specialized tools catalog

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2008 Catalog

SPECIALIZEDTOOLS

Table of Contents

L I N E R T O P T E S T T O O L S

WELL COMMISSIONER WC 4

Liner Top Test Packer LTTP 6

C A S I N G C L E A N I N G T O O L S

RAZOR BACK CCT RB 8

Heavy-Duty RAZOR BACK CCT HDRB 10

BRISTLE BACK CCT BB 12

SHORTY Tool 13

RIDGE BACK Burr Mill RBBM 14

PUP Tool 16

C I R C U L A T I N G T O O L S

Multi-Function Circulating Tool, Clutch Type MFCT 19

Clutch-Type, Heavy-Duty MFCT MFCT-HD 20

Ported Bypass Sub PBS 22

Dual-Action Bypass Sub DABS 23

Single-Action Bypass Sub SABS 24

Multi-Action Circulating Valve II MACV II 25

CENTURION Circulating Valve CCV 26

D E B R I S R E C O V E R Y T O O L S

WELL PATROLLER WP 28

WELL PROTECTOR WPR 30

Junk Muncher JM 31

PUP Finger Basket 32

Quick-Trip Junk Basket QTJB 33

MAGNO BACK CCT MB 34

PUP Magnet Tool 35

R I S E R C L E A N I N G T O O L S

PUP Riser Brush PRB 36

BRISTLE BACK Riser Brush Tool RBT 37

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B O P C L E A N I N G T O O L S

Single-Action Bypass Sub Jetting Tool SABS-JT 38

Dual-Action Bypass Sub Jetting Tool DABS-JT 39

PUP Quick-Trip Jetting Tool QTJT 40

Short Trip Jetting Sub STJS 41

Multi-Action Jetting Tool MAJT 42

W E L L H E A D C L E A N I N G T O O L S

BRISTLE BACK Surface Wellhead Brushing/Jetting Tool WBJT-SUR 44

Stabilizer Jetting and Circulating Tool SJCT 45

A N C I L L A R Y T O O L S

Posi-Drift Sub PDS 46

Landing Sub LS 47

C U S T O M I Z E D T O O L S

Disengageable Mill Assembly DMA 48

Bearing Sub BS 49

Pressure Shear Sub PSS 50

RAZOR BACK CCT with Integral Top Dress Mill RBTDM 51

VARO BACK Combination Casing Cleanup Tool VB 52

Disposable BRISTLE BACK CCT DBB 53

P A T E N T I N F O R M A T I O N 54

L O C A T I O N S 58

WELL COMMISSIONER WC

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The WELL COMMISSIONER* WELLBORE

PRODUCTIVITY* tool from M-I SWACOis unique in that it is designed toallow inflow and negative tests tobe carried out on a liner overlap andthe liner shoe track on the same tripas the wellbore cleanup. It can alsobe used to perform an inflow ornegative test on the liner top andliner shoe track at any time duringthe life of the well. Regardless ofwhen the tool is run, it results insignificant savings in rig time compared to other methods of per-forming an inflow test. Significantreduction in oil-contaminated sea-water or brine volumes generated isalso possible where OBM is in use.

AdvantagesThe WELL COMMISSIONER tool elimi-nates the need for a controlled dis-placement of the entire well tolower density fluid through thechoke with the blowout preventersclosed. It also eliminates a dedi-cated run with a retrievable packerto perform the test, saving signifi-cant rig time. Positive tests on thecasing or liner can also be carriedout. Significant reduction in waste volumes of contaminated fluids isalso made.

How it worksThe WELL COMMISSIONER tool isrun on the drillstring, spacedout to land on the liner-topPolished-Bore Receptacle (PBR)when the cleanout string is atfinal depth. The integral RAZORBACK lantern cleans ahead ofthe packoff element and pre-pares the area in which the toolitself is to be set. The bypassunder the element is openwhile running in hole andallows high-rate circulationwithout the need for fluids togo around the outside of theelement (Figure 1).

Features• One-piece mandrel

• Integral RAZOR BACK*(scraper) lantern

• Integral liner-top dress mill

• Internal bypass under pack-off element

• Standard tool rated to 5,000 psi(345 bar) differential up to 302° F(150° C)

• High-pressure tool rated to7,000 psi (483 bar) differentialup to 302° F (150° C)

Benefits• Saves rig time and improves

effectiveness of cleanup

• Simple to operate

• Allows inflow/negative teston same trip as cleanup

• Allows drilling and millingwith tool in string

• Reduces waste volumes

Figure 1. Pick up off the liner andbegin circulating and conditioningthe mud.

Safety trip button

Weightgauge

UK Patent 2,374,366; U.S. Patent 6,896,064

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OperationWhen the integral liner-top dressmill lands on the PBR, it can be usedto dress off the PBR top if required.A tieback mill can be run below thetool to clean inside the PBR.

A low-density water- or oil-basefluid is then pumped into the upperportion of the drill pipe to reducethe hydrostatic pressure on the lineroverlap and liner shoe track. Whileback pressure on the drill pipe isheld, the tool is set down on theliner top, the packoff element is setand the bypass closed. Back pres-sure bleed-off is the inflow test performed by monitoring for anincreased pressure in the drill pipe,indicating inflow (Figure 2).

When the test is complete, repressurize to the previous backpressure, pick up to release thepackoff element and open thebypass. The normal cleanup anddisplacement to completion fluid

can now be conducted. The MFCT*(Multi-Function Circulating Tool)can be run above the liner top toboost circulation rates.

Operating ParametersIf an MFCT unit is proposed inthe same string as the WELL

COMMISSIONER tool, M-I SWACOwill perform a torque and draganalysis to verify the effective ten-sion in the string at the liner topwhile tripping in hole at 150 ft/min(46 m/min) without rotation. Whena WELL COMMISSIONER tool is run in

conjunction with an MFCT unit, atleast 10,000 lb (4,536 kg) effectivestring weight (tension) should beavailable below the tool when it isat operating depth. If this is not thecase, consideration should be givento increasing the shear rating onthe MFCT unit or running a Clutch-Type, Heavy-Duty MFCT unit oradding drill-collar weight to thestring below.

It is recommended that a tie -back mill is run below the WELL

COMMISSIONER tool to polish theinside of the tieback receptacle ofthe PBR. This reduces the risk of acement sheath, or other debrisbuildup, preventing the tool fromseating on top of the tieback recep -tacle or PBR. Maximum running-in-hole/pulling-out-of-hole speedis 150 ft/min (46 m/min). Therequired inflow test pressure canonly be achieved, if the resulting loading on the liner hanger systemis within operating guidelines.

MaximumTool Maximum Maximum compression

(casing) rotating speed rotating speed at tool whensize, in. in tension, rpm in compression, rpm rotating, lb (kg)

7 – 85⁄8 100 60 5,000 (2,268)

95⁄8 – 10π 120 90 10,000 (4,536)

Operating Parameters

These are general guidelines only and are subject to review, if required, for individual circumstances.

Figure 2. Slowly bleed down the work-string pressure to begin the inflow test.

Liner Top Test Packer LTTP

ApplicationsThe Liner Top Test Packer (LTTP) isdesigned to perform a negative teston the liner top to ensure liner topintegrity before changing fluids.The LTTP is designed to prevent pre-mature setting while running in thehole and also allows a full comple-ment of wellbore cleanup tools tobe run above and below. Runningthe tool while drilling the PlugBack Total Depth (PBTD) and test-ing the liner top reduces trip timeand operating cost.

Tool UseChoose the desired set-downweight by altering the numberof shear pins used in the tool. TheLiner Top Test Packer provides agenerous bypass area to permitincreased trip speeds. M-I SWACOrecommends the use of a SHORTY*Scraper-Magnet tool just below theLTTP to ensure a clean sealing area. Ano-go gauge can be provided to dressoff the liner top. Once the test areais clean, set down on the LTTP andshear the pins, closing the bypassarea and sealing off the packer. Afterthe test, a simple straight pickup isrequired to unseat the packer andre-open the bypass area.

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Features and Benefits• Large internal bypass area

permits faster trip speedsand eliminates swabbingcaused by element expansion

• The LTTP is an integral component of one-trip displacement system

• Easy handling aroundthe rig floor

• Easy activation is achievedby set-down weight (3,000 to30,000 lb [1,361 to 13,608 kg])

• Easy deactivation is achievedby straight pickup

• Tool design will allowreverse circulation

• Tool engineering and designallows tool to be usedwhile drilling cement

LTTP Casing OD (in.)

7 75⁄8 7π 95⁄8 97⁄8

Stack the outcome inyour favor.Drilling and completingthe reservoir is no game,so it shouldn’t be a gamble, either.

• Engineering/simulation software

• Reservoir drill-in fluids

• Fluid-loss-control systems

• Intervention fluids

• Packer fluids

• Breakers

• Spacers and displacement chemicals

• Specialized tools

• Completion fluids

• Filtration

• Pit management

• Vessel cleaning

• Fluids recycling

©2007 M-I L.L.C. All rights reserved. *Mark of M-I L.L.C.

W E L L B O R E P R O D U C T I V I T Y

The products, services and solutions

within the M-I SWACO* WELLBORE

PRODUCTIVITY* offering remove the

guesswork, and the gamble, from those

critical steps between drilling the well

and effectively completing it. Within our

WELLBORE PRODUCTIVITY solutions, oper -

ators have access to project planning

and management, leading technologies,

and coordinated products and services.

All M-I SWACO WELLBORE PRODUCTIVITY

solutions work in concert with one

another to mitigate risk, minimize for -

mation damage, shorten completion

time, increase production, meet safety

and environmental regulations, and

reduce overall costs.

To hear more about this no-games

approach and our solutions for prepar -

ing your wells for better completions,

contact M-I SWACO, where we leave

nothing to chance.

www.miswaco.com

WELLBORE PRODUCTIVITY Solutions

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RAZOR BACK CCT RB

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This new-generation improvementin metal-bladed scraper designbrings even the most complex well-bore cleanups under control. TheRAZOR BACK CCT (Casing CleanupTool) has critically important fea-tures not found on any other metal-bladed casing scraper that render itmore effective, more robust andsafer to use in wellbore cleanupand casing scraping operations.

AdvantagesThe lantern is self-centralizinginside the tubular to ensure equalcleaning force at all angles of wellinclination. The mandrel rotatesthrough the stabilizer sleeves andlantern to avoid wear or damageto the casing during pipe rotation.The tool is HTHP-compatible andis not vulnerable to chemical oracid attack.

OperationThe RAZOR BACK CCT unit isrun with maximum running-in-hole/ pulling-out-of-hole speed

of 150 ft/min (46 m/min), andshould be positioned at least 30 ft(9 m) above the drill bit/ mill andplaced so that it does not passthrough any drilled-out accessoriessuch as landing or float collars. Thestring should regularly be picked upoff-bottom and circulated to clearany accumulated debris.

Where possible, the bit or mill ODshould be greater than the stabilizersleeve OD of the RAZOR BACK CCTdevice. If this is not possible, it isrecommended that a full-gaugemill be run below the first RAZOR

BACK CCT unit in the bottom holeassembly. It is not recommendedto drill cement with a small RAZOR

BACK CCT (3∑- to 5∑-in.) device.Alternatively, it is suggested that adedicated slick-drilling run be madefirst to drill out the excess cementand establish Plug Back Total Depth(PBTD) prior to the cleanup run.Should a slick run not be possible,a Heavy-Duty RAZOR BACK CCT unitis recommended.

Features• Non-rotating, 360° coverage, self-

centralizing metal-bladed lantern

• Right-hand spiral stabilizersleeves with flutes for fluid anddebris bypass

• Available in all common casingand liner sizes

• Supplied with drill-pipe box-up/pin-down connections

Benefits• Removes cement sheath, burrs,

pipe scale

• Eliminates risk of casing wear/damage from stabilizers or bladesduring rotation

• Enhances chemical cleaning action

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How it worksThe RAZOR BACK CCT WELLBOREPRODUCTIVITY tool from M-I SWACOis run as an integral part of thedrillstring to scrape the casingas the pipe is run in hole. It canbe run as part of most drilling/milling/polishing assemblies,as a stand-alone device or, moreoften, with circulating tools andthe WELL PATROLLER* tool as part

of the cleanup system. It canbe rotated and reciprocatedwithout fear of damage to casingor the tool itself.

The RAZOR BACK CCT device con-sists of a one-piece main mandrelcomplete with non-rotating, right-hand spiral stabilizer sleeves anda metal-bladed lantern covering360°. The metal-bladed lantern

is both strong and flexible, and provides the force to contact andscrape the pipe ID effectively.While running in hole, it is goodpractice to break circulation andreciprocate the pipe regularly(every 5,000 ft [1,524 m]) to disperse and enhance thecleanup of any debris buildup.

MaximumMaximum Maximum compression

rotating speed rotating speed at tool whenTool size in tension, rpm in compression, rpm rotating, lb (kg)

3∑ 60 60 3,000 (1,361)

3∑ – 5∑ 90 60 5,000 (2,268)

65⁄8 – 85⁄8 100 60 10,000 (4,536)

95⁄8 – 133⁄8 120 90 15,000 (6,804)

16 120 90 50,000 (22,680)



Heavy-Duty RAZOR BACK CCT HDRB

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The Heavy-Duty RAZOR BACK CCT(Casing Cleanup Tool) fromM-I SWACO WELLBORE PRODUCTIVITY

consists of a high-strength, one-piece mandrel and is designed tomeet the demands of complex well-bore cleanups. By allowing a higherRPM and weight-on-bit rating thanthe standard RAZOR BACK CCT device,the Heavy-Duty RAZOR BACK CCTunit is well suited for drilling upcement accessories commonlyfound inside the liner or casing.

AdvantagesThe Heavy-Duty RAZOR BACK CCTdevice is more effec tive, robust andsafer to use in all wellbore-cleanupor casing-scraping operations thanother designs. It has a higher RPMand weight-on-bit rating than thestandard RAZOR BACK CCT unit.

The lantern is self-centralizinginside the pipe to ensure equalcleaning force at all angles of well

inclination. The mandrel rotatesthrough the stabilizer sleeves andlantern to avoid wear or damageto the casing during pipe rotation.The tool is HTHP-compatible andis not vulnerable to chemical oracid attack.

OperationThe Heavy-Duty RAZOR BACK CCTdevice is run with a maximum running-in-hole/pulling-out-of-holespeed of 150 ft/min (46 m/min) andshould be positioned at least 30 ft(9 m) above the drill bit/mill. Thestring should be picked up off-bottom and circulated regularly toclear any accumulation of debris.

Where possible, the bit or mill ODshould be greater than the stabilizersleeve OD of the tool. If this is notpossible, it is recommended that afull-gauge mill be run below thefirst Heavy-Duty RAZOR BACK CCTunit in the bottomhole assembly.

Features• Self-centralizing flexible-

bladed lantern

• Increased strength, one-piecemain mandrel

• Carbide-compound-covered,fixed-mill rings

• Available in all common casing and liner sizes


Benefits• Fixed-mill rings enhance

efficiency when drillingcement accessories

• Lower mill ring ensures largercuttings are ground down toa size that is manageable forother cleanup tools in the string

• Mandrel rotates through stabi-lizer sleeves and lantern toavoid damage to casing duringpipe rotation

• Lantern is self-centralizinginside casing and ensures anequal cleaning force for all holeinclinations

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How it worksThis tool has all the unique featuresof the standard RAZOR BACK CCTdevice, plus a carbide-compoundcoated fixed upper and lower millring and an increased-strength,one-piece mandrel. This ensuresthe tool can cope with thedemands of drilling up cementaccessories commonly foundinside the liner or casing. Whena drill bit or mill is used, cuttingsgenerated are not always smallenough to easily pass inside oraround wellbore-cleanup tools.The lower mill ring of the Heavy-Duty RAZOR BACK CCT unit ensuresthat larger cuttings and debris are

ground down to a size that makesit easier for them to circulate pastany other tools in the string.

The one-piece, main mandrel iscomplete with non-rotating , right-hand spiral stabilizer sleeves anda metal-bladed lantern covering360°. The main tool body rotatesthrough the stabilizer sleevesand lantern, avoiding wearor damage to the casing duringpipe rotation. The metal-bladedlantern is strong, flexible andself-centralizing, providing theforce to contact and scrape thepipe ID equally and effectively.


(casing) rotating speed in rotating speed in at tool whensize, in. tension, rpm compression, rpm rotating, lb (kg)

4∑ – 5∑ 90 60 30,000 (13,608)

7 – 75⁄8 100 60 35,000 (15,876)

95⁄8 – 11π 120 90 50,000 (22,680)

133⁄8 120 100 55,000 (24,948)



BRISTLE BACK CCT BB

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Complex, precompletion/Drill-StemTest (DST) and workover cleanupoperations demand casing cleanuptools with an effective, robustdesign. The BRISTLE BACK* CCT*(Casing Cleanup Tool) unit delivers.

ApplicationsThe BRISTLE BACK tool fromM-I SWACO WELLBORE PRODUCTIVITY

is run as an integral part of the drillstring to brush the casing IDclean as the pipe is run in hole during complex, precompletion/DST-testing and workover cleanupoperations. It can be run as part ofmost drilling/milling/ polishing assemblies and can be rotated andreciprocated without damage toeither the casing or the tool.

Features• Removes mud solids, cement

sheath and pipe scale

• No risk of casing wear/damagefrom rotating stabilizers

• Brush cleaning life prolongedduring rotation

• Self-centralizing, flexible-brush lantern

• Available in all common casing/liner sizes


Benefits• Scouring action ensures a

clean pipe wall

• Non-rotating stabilizer sleevesand lantern avoid wear or dam-age to the casing and the toolbristles during pipe rotation

• Self-centralizing lantern distrib-utes cleaning force equally forall hole inclinations

How it worksWhile the tool can be run as astand-alone device, it is more com-monly used as part of the cleanupsystem in conjunction with circu-lating tools, the RAZOR BACK CCTunit and/or the WELL PATROLLER filter tool.

The BRISTLE BACK CCT unit con-sists of a one-piece main mandrel;non-rotating, right-hand-spiral sta-bilizer sleeves and a non-rotating ,bristle-covered lantern. Duringpipe rotation, the mandrel rotatesinside the stabilizer sleeves andthe lantern, avoiding wear or damage to the casing as wellas the tool’s bristles.

The strong, flexible, non-rotatinglantern is set with spring-steel

bristles and provides the force tocontact and clean 360° of the cas-ing’s internal diameter. It is alsoself-centralizing inside the casingto ensure equal cleaning force atall angles of inclination.

The tool uses no bolts, clamps orthreaded-on rings that can loosen,and there are no springs, multiple-bristle pads or blocks. The tool isHTHP-compatible and is not vul-nerable to chemical or acid attack.As a result of all of these designenhancements, the BRISTLE BACKCCT unit is more effective, morerobust and safer to use in well-bore cleanup operations thanother designs.

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ApplicationsThe modular design allows theclient to configure a tool designfor specific applications or require -ments. SHORTY tools can be deliv-ered in a variety of combinationswith: scrapers to dislodge difficult-to-remove debris; magnets to cap-ture ferrous debris; junk basketsto capture loose debris; and stain-less steel brushes to disturb debrisfrom the inner production riser, casing or liner.

Tool UseRun the SHORTY Tool in the innerproduction riser, casing and linerto remove scale, rust, mud cake, ferrous debris and pipe dope.Additional PUP* tools can be addedto the workstring to accomplishmore in fewer trips.

Features and Benefits• The modular design allows

one tool to carry scrapers,brushes, magnets, junk bas-kets, centralizers and/orgauge rings

• Mandrel can be engineeredand designed with either APIor high-torque connections

• Centralizers’ engineered flutedesign allows large debristo be removed without flowrestriction. M-I SWACO caneliminate the need for agauge-ring run by placingthe centralizers at drifton the tool.

• Double-crimped, stainlesssteel brushes stand up toharsh operating conditions.Engineered and designed toprovide 360° coverage.

• Powerful magnets designedand engineered to be 100% surface active

• Junk basket has an unre-stricted 360° opening at thetop for easy debris collection

• Bidirectional scraper bladeswith aggressive surfacesscrape up and down, makingshort trips more effective.Engineered and designedto provide 360° coverage.

• No external fasteners forreduced risk of having a component dislodged intothe wellbore

• Self-cleaning spiral brush andscraper arrangement allowsunrestricted annular flow forbetter solids/debris removal

• The large ID enhances circu -lation for faster cleanups

• Subs are engineered anddesigned with either API orhigh-torque connections

SHORTY Tool

RIDGE BACK Burr Mill RBBM

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The RIDGE BACK* Burr Mill is anM-I SWACO WELLBORE PRODUCTIVITY

casing cleanup tool developed foruse in perforated casing or linerto remove perforation burrs andto ensure the safe passage of completion equipment.

AdvantagesA unique feature of the RIDGE BACK

Burr Mill is the ability to turn it offonce the milling/cleaning operationis complete if other extensive rota-tion is anticipated before pullingout of the hole. This is achievedby circulating a ball down, andshifting an internal support sleeve,to remove the expanding force onthe milling ribs. These ribs are thenheld recessed into the tool andaway from the pipe ID.

Full circulation through the ID ofthe tool is possible before and afterthe support sleeve is moved. Thetool can also be used to clear offequally stubborn ID-restricting

materials (e.g., heavy pipe scale)from the inside of casing/liner toregain full pipe ID.

OperationAt least one MAGNO BACK* toolshould be run above the RIDGE

BACK Burr Mill to collect themilled material. In addition, con -sideration should be given to run-ning a RAZOR BACK tool and aWELL PATROLLER unit above thetop MAGNO BACK tool. It shouldbe run at a maximum run-in-hole/pull-out-of-hole speed of150 ft/min (46 m/min). If thestring is to be rotated at the samedepth for more than 30 min, it isrecommended that the RIDGE BACK

Burr Mill be deactivated. This isachieved by dropping and circulat-ing a ball to the tool and applyingpressure to shift the internal sup-port sleeve. It should be noted thatwhen the tool is deactivated, it cannot be reactivated.

Features• One-piece mandrel

• Cleans by rotation and up/downpipe movement



• Milling ribs can be deactivatedby ball drop to minimize casingwear during periods ofprolonged rotation

Benefits• Provides advanced wellbore

cleanup in the post-perforatingwell phase, where a high degreeof casing or liner ID smoothnessthrough the perforated intervalis required

• Completely removes perfora -tion burrs, preventing damageto completion equipment, including expandable screens/expandable pipe used in complex/smart completions

• Capability to turn off tool oncethe milling/cleaning operationis complete to avoid casing wear

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How it worksThe RIDGE BACK Burr Mill isbuilt on a one-piece drill-pipe mandrel and is equipped withthree expandable milling ribs thatmake contact with the full ID ofthe casing/ liner. The right-handface of the milling rib is dressedwith a carbide compound so thatthe expanding force, coupled withright-hand rotation, ensures perfo-ration burrs are removed from theID of the pipe.

The lower end of the tool hasa fixed-mill sleeve (Figure 1), alsodressed with a carbide compoundto remove a proportion of the perforation burrs before theexpandable mill ribs removethe remainder of the burrs to

reinstate the full pipe ID. The upperend of the tool has a fixed stabilizersleeve to provide balanced supportto the mill ribs.

Removal of perforation burrsis achieved by running in holeand pulling out of hole throughthe perforated interval at a

predetermined speed (10 ft/min[3 m/min]), while rotating atthe recommended 60 rpm. Thisensures sufficient contact timebetween the mill ribs and each per-foration to effectively remove allburrs and leave the pipe ID smoothand free of restrictions.

Figure 2. Burrs on tubular ID prior tocleaning with RIDGE BACK* Burr Mill.

Figure 1. Lower fixed mill sleeve.

Maximum MaximumMaximum rotating speed rotating speed Deactivation

Tool rotating speed in in tension in tension pressure, size, in. compression, rpm (activated), rpm (deactivated), rpm psi (bar)

7 – 81⁄16 60 60 100 1,800 (124)

95⁄8 – 10π 60 60 120 830 (57)



PUP Tool

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ApplicationsThe modular design allows theclient to configure a tool for specificapplications or requirements. PUP

tools can be delivered in a varietyof combinations with: scrapers todislodge difficult-to-remove debris;magnets to capture ferrous debris;junk baskets to capture loosedebris; and stainless steel brushesto disturb debris from the inner production riser, casing or liner.

Tool UseRun the PUP tool in the inner production riser, casing and linerto remove scale, rust, mud cake, ferrous debris and pipe dope.Additional PUP tools can be addedto the workstring to accomplishmore in fewer trips.

Features and Benefits• Safety Feature: The tool design

incorporates an integral pupjoint to facilitate tool pickupwith standard drill-pipe elevatorsand slips

• The modular design allowsone tool to carry scrapers,brushes, magnets, junk baskets,centralizers and/or gauge rings

• Mandrel can be engineeredand designed with either APIor high-torque connections

• Centralizers’ engineeredfluted design allows largedebris to be removed withoutflow restriction. The need for agauge-ring run can be eliminatedby placing the centralizers atdrift on the tool.

• Double-crimped, stainless steelbrushes stand up to harsh oper -ating conditions. Engineered anddesigned to provide 360° coverage.

• Powerful magnets designedand engineered to be 100% surface active

• Junk basket has an unrestricted360° opening at the top foreasy debris collection

• Bidirectional scraper bladeswith aggressive surfaces scrapeup and down, making short tripsmore effective. Engineered anddesigned to provide 360° coverage.

• No external fasteners for reducedrisk of having a component dislodged into the wellbore

• Self-cleaning spiral brush andscraper arrangement allowsunrestricted annular flow for better solids/debris removal

• The large ID enhances circulationfor faster cleanups

• Subs are engineered anddesigned with either APIor high-torque connections

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4 magnets 4 brushes 4 scrapers2 junk baskets, 2 magnets

DRILLINGSOLUTIONS

WELLBOREPRODUCTIVITY

ENVIRONMENTALSOLUTIONS

Wellsite and project engineering

Simulation software

Drilling-fluid systems and additives

ALPINE SPECIALTY CHEMICALS*FEDERAL* Wholesale

HDD Mining & Waterwell

Technical support

Mud mixing

Rig-equipment engineering

Drilling waste management• Solids control• Screens• Cuttings collection• Pneumatic transfer• Cuttings re-injection• Dewatering• Desorption technologies• Site remediation

Pressure control

Engineering/simulation software

Reservoir drill-in fluids

Fluid-loss-control systems

Intervention fluids

Packer fluids

Breakers

Spacers and displacement chemicals

Specialized tools

Completion fluids

Filtration

Pit management

Vessel cleaning

Fluids recycling

Oilfield/production chemicals

Chemical management

H2S removal

Drag reduction

Produced water management

Production-tank cleaning

Production waste management

Mud mixing

Rig-equipment engineering

Drilling waste management• Solids control• Screens• Cuttings collection• Pneumatic transfer• Cuttings re-injection• Dewatering• Desorption technologies• Site remediation

Pressure control

Pit management

Vessel cleaning

Fluids recycling

Production-tank cleaning

Production waste management

PRODUCTIONTECHNOLOGIES

The solutions that drive us

18

Multi-Function Circulating Tool, Clutch Type MFCT

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Features• Does not require darts or balls

to be pumped down the drill pipe

• Can be operated in the holeas many times as requiredby slacking off or picking upthe drill pipe

• Allows drilling or milling totake place with the tool inthe string

• Internal clutch allows drillstringrotation above the tool with thecirculating ports open

• Available to run in all commoncasing and liner sizes

Benefits• Offers the option of performing

the open/closed cycle as manytimes as required without havingto pull out of hole, allowingimmediate control of the circulation route

• More accurate fluid placementthan can be obtained witha conventional ball drop circulation sub

• Only transmits rotating torqueabove the circulating ports, pro-tecting the lower string frompotentially damaging torque

• Increases flow rate in the annular sections

Efficient drilling is dependent onkeeping the hole free of debris. Theclutch-type MFCT (Multi-FunctionCirculating Tool) unit, developed foruse when well cleanout is requiredprior to running completions or teststrings, is a valuable option.

ApplicationsThe MFCT WELLBORE PRODUCTIVITY

tool from M-I SWACO is particularly

suited to wells with small linerdiameters where well cleanups areperformed prior to running com -pletions or test strings. This toolcan be run when drilling cementand milling/polishing liner-topPolished-Bore Receptacles (PBRs),providing pipe rotation above theliner with the ports open while protecting the string below frompotentially damaging torque.

How it worksThe MFCT unit is operated ina similar fashion to a bumpersub used during drilling. Thetool, made up with a shear ringin place (7,000- to 60,000-lb[3,175- to 27,216-kg] shear), isfully stroked out when runningin hole, and circulation passesthrough the end of the drill-string. Rotating torque is trans-mitted to the whole string(clutch engaged). Upon first activation, the required weightis slacked off onto a device, suchas a stabilizer or top-dress mill,at the point of interest (usuallyabove a small-diameter liner)and the outer sleeve movesdown, allowing the fluidbypass to be activated.

The tool is now open and highcirculation rates can be attainedthrough the tool ports. Rotatingtorque is only transmitted abovethe circulating ports (clutch dis-engaged). Circulation is restoredthrough the end of the drillstringby simply picking up the drillpipe, moving the outer sleeveup and re-engaging the clutch.The open-closed cycle can be performed as many times asrequired without the need forexpensive trips out of the hole,giving the driller immediate,positive control of thecirculation route.

Clutch-Type, Heavy-Duty MFCT MFCT-HD

The Clutch-Type, Heavy-Duty Multi-Function Circulating Tool (MFCT*)unit from M-I SWACO WELLBORE

PRODUCTIVITY is a valuable optionwhen well cleanout is required indeeper, deviated wells and/or whenit is necessary to start and stop thecleanout operation at several placesin the wellbore.

ApplicationsThis tool is an enhanced versionof the original MFCT device and issuited for use in deeper, deviatedwells where there is a requirementfor higher tensile and torsional rat-ings. It is also applicable when itis desirable to lock this type of cir -culating tool in the open/closedposition, such as performingan inflow test on a liner lap.

The Clutch-Type, Heavy-DutyMFCT unit has the same basic func-tionality as the original version. Itallows higher cir culation rates to beachieved at various times during a

wellbore cleanup to displace debrisor fluid out of the hole. It also allowsflow rates to be boosted at a linertop to increase the annular velocityof the wellbore fluid, therebyincreasing the cleaning action.The tool is particularly suited towells with small liner diameters inwhich well-cleanup operations areperformed prior to running comple-tions or test strings. The tool canbe run when drilling cement andmilling/polishing liner-top PBRs.

The use of this tool also allowsthe spotting of chemical pills andthe efficient displacement of well-bore fluids. In addition, it offers thebenefit of pipe rotation and circula-tion above a liner, with the jettingports open, while protecting thelower string from potentially dam-aging torque. When the tool is open,only the drillstring above the toolcan be rotated. When the tool isclosed, the complete string can berotated with circulation directedthrough the bit or mill.

Features• Does not require darts or balls to

be pumped down the drill pipe

• Can be cycled open and closedin the hole as many times asrequired by simply slackingoff/picking up the drill pipe

• Allows drilling/milling to takeplace with the tool in the string

• Internal clutch for drillstringrotation above the tool withthe circulating ports open

• Can be locked closed in compres-sion to avoid premature openingwhile RIH; can be locked openin tension to allow the tool tobe picked up off the liner topwhile continuing to circulateat high rates

Benefits• Allows flow rates to be

boosted at a liner top toincrease the annular velocityof the wellbore fluid, therebyincreasing cleaning action

• Allows spotting of chemicalpills and efficient displacementof wellbore fluids

• Gives the benefit of pipe rotationand circulation above a liner withthe ports open, while protectingthe lower string from potentiallydamaging torque

20


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How it worksThe Clutch-Type, Heavy-Duty MFCTdevice is run with a suitable no-godevice (liner-top dressing mill, bearing sub or stabilizer) below it,allowing it to be operated withoutputting the lower string in compres-sion. No darts or balls need to bepumped down the drill pipe, andthe tool can be operated in the holeas many times as required by sim-ply slacking off/picking up the string.When Running In Hole (RIH), thetool is fully stroked out, with all cir-culation passing through the endof the drillstring. In this initial posi-tion, rotating torque is transmittedto the whole drillstring. The tool hasshear screws installed to ensurethat it will not open prematurelywhile RIH. If the shear screws areinadvertently sheared by high dragforces, the tool will remain closedand RIH can continue without anyfurther action being taken.

To operate the Clutch-Type,Heavy-Duty MFCT device, the drillersets the tool down and applies therequired weight to shear the screws.

When the screws are sheared, theouter body of the tool moves downa short distance, putting the toolinto the “locked-closed” position.The string is then picked up andslacked off again to move theouter body down the full strokelength, putting the tool in theopen position. High circulatingrates can now be achieved throughthe circulating ports. If required,

the tool can be picked up off theliner top into the “locked-open”position. Rotation is still not trans-mitted below the tool in this posi-tion. To close the tool, the stringis slacked off and picked up onceagain, returning it to the originalclosed position. The tool can beopened and closed as many timesas required by manipulatingthe string.

Figure 1. Slack off onto the liner top with-out circulation with sufficient weight toshear the shear ring and open the circu -lation ports. Check circulation rates toestablish that the tool is open.

Figure 2. Slack off onto the liner top with-out cir culation to open the tool. Displacethe drill-pipe/ casing annulus and rotatethe string. Note that the clutch is nowdisengaged and only the upper stringis rotated in this position.

Pressure Pump rate

Ported Bypass Sub PBS

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The Ported Bypass Sub helps toestablish communication betweenthe fluids in the drill-pipe pressureand fluid flow around a tool inthe drillstring.

ApplicationsThe Ported Bypass Sub fromM-I SWACO WELLBORE PRODUCTIVITY

is normally run above the WELL

PATROLLER tool to provide an addi-tional means of equaliz ing pres -sure and fluid flow around thetool, should it fill with debriswhile pulling out of hole. TheWELL PATROLLER unit is run as a contingency device, and is onlyopened if required.

The Ported Bypass Sub can alsofunction as a drill-pipe drain sub.

Features• One-piece, full-strength

drill-pipe mandrel

• Ball retained on seat in tool

Benefits• To open up communication

between the internal diameter of the drill pipeand the annulus

Figure 1. The Ported Bypass Sub is run in the hole in the closed position.

RIH closed position

Port

Figure 2. When pulled out of the hole, thetool is in the open position.

Open in bypass position

Port

How it worksThe tool is run in the closedposition, and when required,a ball is dropped to openthe ports. Fluid can then bepumped both through the portsand down through the tool.

The Ported Bypass Sub isopen communication betweenthe drill pipe and the annulus.


The DABS* (Dual-Action Bypass Sub)WELLBORE PRODUCTIVITY tool fromM-I SWACO is designed to run inthe cleanup string when it is desir-able to jet the riser and BlowoutPreventer (BOP) while Running InHole (RIH) and/or when Pulling OutOf Hole (POOH). It can also be usednearer the bottom of the string as abypass valve above a drilling motoror small-diameter tail pipe.

AdvantagesThe DABS tool permits jetting oper-ations while running in hole and/orwhen pulling out of hole.

Operating ParametersNote that the balls do not need tobe circulated down at this reducedrate. It is only when the ball nearsthe ball seat that these rates shouldbe applied (see table below).


mandrel

• Two sets of ports and twointernal ball seats that can bemoved to open/close ports

• Available in 4π- and6∑-in. OD

• Also available as 11- and16-in. (279- and 406-mm) jetting tools

Benefits• Used to jet BOPs and risers

• Can be used to bypassdrilling motors

• Can be run above small,non-draining pipe

Figure 1. The lower ports are closed bydropping a ball and applying pressure.

Figure 2. The upper ports can be opened by dropping a second ball and applying pressure.

How it worksThe tool is run in the open posi-tion to jet and clean as it movesthrough the riser and BOPs. Theexternal jetting ports on thesub are then closed to circulateonce again, and reopened whenPOOH, allowing jetting to occur.

Circulating position

Closed

Ports

Closed

POOH and jetting position

Open

Ports

Closed

Dual-Action Bypass Sub DABS

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Maximum circulating Maximum circulatingRotating rate when landing rate in the open

Tool size, in. speed balls, gpm (bbl/min) position, bbl/min

3∑ IF No limit 63 (1.5) 15

4∑ IF No limit 105 (2.5) 30

XTM50 No limit 105 (2.5) 30


OperationThe DABS unit is RIH with thecleanup string, self-filling throughthe open ports and circulating/jetting as required. A ball is droppedto close the ports, then drillingor circulating occurs as required(Figure 1). Dropping anotherball opens the ports to trip outwhich allows self-draining and circulation/ jetting to take place asrequired (Figure 2).

Single-Action Bypass Sub SABS

Port

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This tool makes it possible to boostthe flow velocity in a casing stringabove a liner or casing crossoverwhere a smaller liner exists.

ApplicationsThe SABS unit from M-I SWACOWELLBORE PRODUCTIVITY is used:to boost the flow velocity in a cas-ing string above a liner or casingcrossover where a smaller linerexists; to spot lost-circulation material or other pills, bypassingthe motor or measurement-while-drilling tool; to boost flow in theannulus to remove cuttings beds;or to jet wellhead, blowout preventers or risers.


mandrel

• Balls retained on seats in tool

Benefits• When using the SABS (Single-

Action Bypass Sub) tool to jetthe riser, wellhead and/or BOPstack, the large, 11- to 16-in.(279- to 406-mm) OD sleevesallow the jets to clean closerto the profile

• To reopen and close portsafter the initial cycle, twoSABS units can be runin tandem

How it worksInitially, the tool is run in holewith its ports in the closed posi-tion. To open the ports, a ballis dropped, and the pumprate is increased to circulate athigher annular velocity throughthe ports in the tool. To close theports, a second ball is dropped,and pumping can be resumedthrough the string below thesub. Once dropped, both ballsremain on seat at all times.

To have the option of reopen-ing and then re-closing portsafter the initial cycle, two SABSunits can be run in tandem.

The SABS tool is used toboost flow velocity in a cas-ing string above a liner or casing crossover.

Figure 1. When desirable during the well-bore cleanup, a ball is dropped to a ball seatand pressure applied to open up the ports.

RIH position

Port (closed)

Figure 2. The pump rate can then beincreased to circulate at increased annularvelocity through the ports in the tool.

Open and circulating position

Port (open)

Multi-Action Circulating Valve II MACV II

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ApplicationsThe Multi-Action Circulating Valve II(MACV II) allows communicationof fluid from the workstring to thecasing annulus when increasedannular velocities are necessaryto enhance wellbore cleaning. Theupper string can be rotated andreciprocated while the lower stringremains stationary.

Tool UseChoose the desired shear-pinrating. Install the MACV II toallow circulation above the linertop, riser or mud motor. Set weightdown to shear the pins and openthe circulating valve.

Features and Benefits• No trip-speed limitation

• Large bypass area increasesdisplacement efficiency

• Shear weight — variable setting

• Unlimited cycles(index mechanism)

• No activation/ deactivation balls

• Rotation isolation

• Circulation bypass valveabove mud motor

• Increases annular velocityin casing, liner or riser

• Indexing feature allows forthe MACV II to remain in theopen or closed position

MACV II (in.) Casing (in.)

5 7 to 87⁄8

7 95⁄8 to 24


CENTURION Circulating Valve CCV

Critical drilling operations demandmultiple capabilities such as flowsplitting, reverse cir culation andfluid displacement. The advancedCENTURION* Circulating Valve (CCV)WELLBORE PRODUCTIVITY tool fromM-I SWACO per forms many func-tions, including spotting Lost-Circulation Material (LCM) pills,boosting annular flow velocities,pulling dry pipe and flow-splittingduring drilling.

AdvantagesNo complicated ball/dart sequenceor potentially problematic pumpon/off hydraulic sequencing isrequired to open and close the tool.Use of unique ball-seat technologyallows the same-size ball to openand close the tool, eliminat ing therisk of dropping the wrong size ball.In addition, high circulation rateswill not cause the tool to function prematurely. Removal of cuttingsbeds in high-angle/horizontal wellsis possible through boosting ofannular velocities.

OperationWhen run with the Bypass BallCatcher, other ball-drop tools canbe run below the CCV. The designof this Bypass Ball Catcher allowssmaller balls to be dropped past thetool and continue down the stringto operate the other tools.

The CCV can be run or pulled outof hole, with the ports locked openor closed and remains in that posi-tion until activated by dropping aball. The same size activation ballis used to open and close the tool,and the only limit on the numberof cycles is the capacity of theball catcher. The CCV is normallypositioned above the BHA orsmall-diameter drillstring.

When spotting coarse LCM, alower ball seat is installed in thetool whereby the flow to the bitis shut off by dropping a special“shut-off” ball to this seat afteropening the tool (Figure 2).

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Figure 1. Figure 2.

Drilling fluid

Circulation path

Drilling fluid

Circulation path

Majority of flow up the annulus

100% flow into the annulusSmall % of flow

down the hole


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Features• Generous port flow-through area

• Multiple open/close cycles(14 balls)

• Available in a range of sizesfor various drillingstring configurations

Benefits• High circulation rates do

not cause the tool to function prematurely

• Prevents coarse LCM from entering sensitive BottomholeAssembly (BHA) elements suchas LWD/MWD, etc.

• Optional ball or wireline accessbelow the tool is possible, evenafter it has been activated

• Eliminates risk of droppingwrong size ball

• Reverse circulation possiblethrough tool

How it worksThe tool can be run in hole orpulled out of hole with the portslocked open/closed and willremain in the same position until activated by dropping a ball. Thesame size of activation ball is usedto open and close the tool and theonly limit on the number of cyclesis the capacity of the ball catcher.

When run with the Bypass BallCatcher (BBC), other ball-drop tools

can be run below the CCV. Thedesign of the BBC allows smallerballs to be dropped past the tooland continue down the string tooperate the other tools. Wirelineaccess (e.g., to retrieve a radioactivesource from a stuck BHA or torun a gyro survey) is also possible(depending on the size and config-uration of the tool string) throughthe CCV/BBC combination.

Flow splittingwith theCENTURION

CirculatingValve.

Boostingannular velocity withthe CENTURION

CirculatingValve.

Spotting LCM with theCENTURION

CirculatingValve whileprotecting sensitive BHAcomponents.

Dropping asmaller ballthrough theBypass BallCatcher.

Running wire-line throughthe WirelineAccess BallCatcher.

Maximum circulating rate or Maximum pressure when pumping balls circulating rates Opening and

Tool Rate, Pressure, Open, Closed closing pressuresize, OD gpm (L/min) psi (bar) gpm (L/min) gpm (L/min) psi (bar)

4π 84 (318) 1,500 (103) 840 (3,180) 672 (2,544) 2,500 (172)

6π 126 (477) 1,200 (83) 1,050 (3,975) 840 (3,180) 2,000 (139)

8∏ 126 (477) 1,000 (69) 1,680 (6,359)† 1,344 (5,088)† 1,800 (124)

9∑ 126 (477) 1,000 (69) 1,680 (6,359)† 1,344 (5,088)† 1,800 (124)

These are general guidelines only and may be subject to review, if required, for individual circumstances.†Maximum circulating rates stated are for 18 lb/gal (2.16 kg/L) mud. Please contact your M-I SWACO representative at the planning stage of the well if the mud weight is heavier than 18 lb/gal (2.16 kg/L).

The maximum surface circulating pressure must be no greater than the above values at these recommended pump rates.

WELL PATROLLER WP

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The WELL PATROLLER downhole filtertool is an advanced M-I SWACOWELLBORE PRODUCTIVITY wellborecleanup tool developed for use inthe precompletion/ drill-stem testphase of a well, where a high degreeof cleanliness and validation of suchis required.

AdvantagesPerforming a dual function, theWELL PATROLLER tool first performsa cleaning action and then vali -dates the effectiveness of thecleanup operation.

OperationAs the string is RIH, the divertercup/wiper cleans the ID of the casing, removing the film of gunk(oil-base mud, barite, cement andmagnetized steel particles) clingingto it (Figure 1). The cleanup opera-tion is carried out in the normalway, pumping down through theWELL PATROLLER drill-pipe mandreland back up between the mandreland the filter jacket. When cir cu -lation is complete, the string ispulled and the diverter cup/wipercleans the ID of the casing anddiverts the annular fluid into thetool through its large annulus.

The fluid passes through the wirescreen filter with debris beingretained inside the tool screenbody (Figure 2).

One other application is thatthe tool is often positioned in thecasing below the wellhead duringriser cleaning and blowout preven-ter wellhead jetting to collect any dislodged debris that falls intothe well.

Features• Available in all common

casing and liner sizes

• No balls/darts

• Run in conjunction withthe Ported Bypass Sub

• 0.025-in. (0.6-mm) screen tofilter out small particles

• New kidney-shaped valves available to allow larger piecesof debris to pass into tool

• Large flow areas through thetool even though diverter cupis in contact with casing ID(so no swab or surge)

• Field redressable

• Rupture discs relieve pressure inthe unlikely event that the toolbecomes completely full ofimpermeable material

Benefits• No balls or darts pumped

down drill pipe

• The tool is operated simplyby Running In Hole (RIH)and Pulling Out Of Hole (POOH)

• Allows milling or drilling to takeplace with tool in the string

• Dual functionality tool, first performs a cleaning action,then validates the effectivenessof the cleanup operation

• Tandem and triple runs possible

Figure 1. Running in hole, wiping the ID ofthe casing.

Figure 2. Pulling out of the hole, collectingresidual debris.

Standoff sleeve

Screen

Debris

The arrows indicate thepath of fluid circulation

The arrows indicate thepath of fluid circulation

UK Patent 2,335,687; U.S. Patent 6,250,387

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How it worksUntil the introduction of theWELL PATROLLER tool, the onlyway to check that debris hadbeen removed from the annuluswas by measuring the turbidityand solids content of the fluidreturning to surface. The toolis designed to be run in thecleanup string and completesthe cleanup by filtering theremaining debris from theannulus through a wirescreen filter. It is usually runin conjunction with the MFCT(Multi-Function CirculatingTool), RAZOR BACK and BRISTLEBACK tools.


(casing) rotating speed rotating speed at tool whensize, in. in tension, rpm in compression, rpm rotating, lb (kg)

4∑ – 5∑ 90 60 5,000 (2,268)

65⁄8 – 85⁄8 100 60 10,000 (4,536)

95⁄8 – 133⁄8 120 90 15,000 (6,804)



Operating ParametersThe tool should be placed so that itdoes not pass through any drilled-out accessories, such as landing collars or float collars. Run at amaximum running-in-hole/pulling-out-of-hole speed of 150 ft/min(46 m/min), the tool should be posi-tioned at least 30 ft (9 m) above thedrill bit/mill. It is possible to reversecirculate through a WELL PATROLLER

tool, but it is recommended thatone hole volume is circulated the“long way” before any reverse circulation is performed.

WELL PROTECTOR WPR

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Thorough cleaning of the wellheadand Blowout Preventer (BOP) areasof any surface well must includecatching the harmful debris loosened by the operation.

ApplicationsThe WELL PROTECTOR* tool fromM-I SWACO WELLBORE PRODUCTIVITY

captures material loosened duringcleaning of the BOP and wellheadand/or operational testing of theBOP rams. It acts as a backup tocatch debris that is not circulatedout or that falls downward intothe well.

How it worksThe tool is run below the wellheadinside the casing during BOP andwellhead jetting or functioning ofthe BOP rams. It can be positionedin the casing during riser cleaningoperations or when retrieving wearbushings/bore protectors.

The tool features a large-capacity,6-ft (2-m) wire-wrap screen to fil-ter out small and large debris thatfalls into it. A rounded bullnose onthe bottom acts as a guide and isequipped with a large valve foreasy removal of collected material.Above the filter screen is a divertercup and ported standoff guide toensure that all the debris is col-lected rather than falling aroundthe outside of the tool.

The WELL PROTECTOR tool isequipped with an integral drill-pipe-handling sub for slips and elevators and a 4∑-in. (114-mm)IF (NC 50) box connection.

Features• Large debris/junk collec-

tion capacity

• 0.025-in. (0.635-mm) screenfilters out small particles

• Diverter cup preventsbypass of debris

• Integral drill-pipe handling sub

• Can be redressed in the field

Benefits• Available for all common

casing sizes located directlybelow the wellhead

• Simple to run and redressand can be used multipletimes without the needfor onshore service andinspection

The Junk Muncher WELLBORE

PRODUCTIVITY tool from M-I SWACOis used to validate wellbore cleanupoperations. It collects larger piecesof milling debris generated duringcasing milling or window-cuttingoperations. It can also clean up per-foration debris that restricts the IDof perforated pipe.

AdvantagesThe Junk Muncher tool is suitable torun after casing-milling or window-cutting operations to collect largerpieces of milling debris sometimesproduced during these oper ationsand which cannot other wise beremoved. It is also suitable for usein already perforated pipe to cleanup or remove perforation debristhat restricts the ID while retrievingjunk that cannot be circulated out.

The milling profile can be sup-plied suitable to dress off liner-topPolished-Bore Receptacle (PBR) pro-files. The bypass and swallowingcapacity have been maximized byusing a smaller, high-torque, rotary-shouldered connection on the bottom of the tool.

OperationThe Junk Muncher can be run ina combination drillstring to collectjunk in larger casing above a liner,or directly above a mill or bit to

collect large pieces of junk off thebottom. The bit or mill acts to jetand circulate the junk up intothe catcher.

When the integral liner-top dressmill lands out on the PBR it can beused to dress off the PBR top. Ifrequired, a tieback mill can be runbelow the tool to clean the PBR ID.The Junk Muncher is run with amaximum running-in-hole/pulling-out-of-hole speed of 150 ft/min(46 m/min), which means thatthere are no restrictions comparedto others in the string.


Junk Muncher JM

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Features• One-piece mandrel with

box-up/pin-down connections

• Integral liner-top dress-millprofile or junk-mill profileavailable

• Pilot mill available

Benefits• Designed to remove large

pieces of debris from the wellbore through largeentry throats

• Run as part of the cleanupoperation or as part of a dedicated junk cleanout run

• When run below the WELLPATROLLER device, the toolallows smaller debris to passthrough to be collected bythe WELL PATROLLER tool

How it worksThe collection vessel is a large-OD tube ported to allow debris,cuttings, cement particles andsmaller pieces of junk to passthrough and be circulated outof the hole. The large pieces ofjunk that enter the collectorare retained and preventedfrom falling out the bot tomby flapper valves that are flow-assisted to open andspring-assisted to close.

A significant volume oflarge junk pieces can be col-lected in the tool. In the case ofextremely large pieces of junk, drilling/milling services can beprovided to assist in reducingthe size of the junk.

The Junk Muncher can be run on the sametrip as a precompletion mechanical well-bore cleanup run or during a dedicatedjunk cleanout run.

MaximumBox Maximum Maximum compression

connection rotating speed rotating speed in at tool whensize, in. in tension, rpm compression, rpm rotating, lb (kg)

3∑ IF 100 60 5,000 (2,268)

4∑ IF 120 90 10,000 (4,536)

5∑ NK DSTJ 120 90 10,000 (4,536)


PUP Finger Basket

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ApplicationsThe PUP Finger Basket design trapsthe larger debris generated whendrilling/milling various types ofplugs and other downhole equip-ment. The debris is captured by twoevents: activation of the fingerswhile pulling out of the hole, andduring conventional circulating upthe annulus.

Tool UseThe PUP Finger Basket is placedin the workstring to capture andremove large debris generated dur-ing drilling of plugs and retainers,jetting operations, and chemicaldisplacements and cleanups.

Features and Benefits• Safety Feature: The tool design

incorporates an integral pupjoint to facilitate tool pickupwith standard drill-pipeelevators and slips

• Large entry and capacityallow for effective debriscollection

• Allows solids to be circulatedout of the wellbore

• Captures larger problematicdebris from the wellborewhen pulling out of the hole

• The large ID enhances reversecirculation, facilitatingfaster cleanup

• The robust, non-rotatingdesign allows the tool to beused while drilling cement

• The PUP Finger Basket comple-ments the PUP Scraper/ Brush/Magnet tool, the PUP Quick-Trip Jetting Tool or Multi-Action Jetting Tool, and thePUP Riser Brush

• The generous basket annulusdoes not impede the fluid’s ability to remove debris fromthe well

• The PUP Finger Basket isdesigned to withstandpipe rotation and recipro -cation without hamperingoperations

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Quick-Trip Junk Basket QTJB

ApplicationsThe Quick-Trip Junk Basket (QTJB) isa mechanical device that preventsdebris from entering the wellboreduring jetting action in the BOPstack, marine riser and/or the casing/ wellhead area.

Tool UsePlace the QTJB in areas where debriscan fall into the wellbore. It shouldbe used in conjunction with the PUP

Quick-Trip Jetting Tool, the Multi-Action Jetting Tool or the PUP RiserBrush to assist in the removal ofcontaminants by preventing debrisfrom re-entering the clean wellbore.

Features and Benefits• Safety Feature: The tool

design incorporates a pupjoint to facilitate tool pickupwith standard drill-pipe elevators and slips

• Simple design makes the tooleasy and safe to handle forthe rig crew

• Versatile design comple -ments any drilling or completion operation

• Diverter element sendsdebris to a larger bootwhen the BOP is jetted

• Basket can capture up to 6 gal(22.7 L) of debris

• Ideal for use with the PUPQuick-Trip Jetting Tool or theMulti-Action Jetting Tool

• Robust design


MAGNO BACK CCT MB

Specifically designed to meet thedemands of complex wellborecleanup operations, the MAGNO

BACK* CCT tool is a magnetic down-hole sub that is well suited to pre-completion/ drill-stem tests andworkover cleanup.

ApplicationsThe MAGNO BACK CCT WELLBORE

PRODUCTIVITY tool from M-I SWACO

is run as an integral part of the drillstring during cleanup to collectand remove ferrous metal debrisfrom the well. It can be run as partof most drilling/milling/polishingassemblies, and can be rotatedand reciprocated without fear ofdamage to casing or the tool.

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Features• One-piece main mandrel,

complete with non-rotating stabilizer sleeves

• Provides standoff above andbelow magnet with two non-rotating, right-hand-spiral stabs

• Magnets protected by stainless steel sleeve

• No risk of casing wear/ damage from stabilizersor blades while rotating


• Available in common casing/liner sizes

• Standard drill-pipe connections

Benefits• Main body rotates through

sleeves, avoiding casing wear during pipe rotation

• Ferrous metal debris is attractedto the tool and is POOH withthe unit

How it worksSimply Run In Hole (RIH), theMAGNO BACK CCT unit attracts fer-rous metal debris, then Pulls Out OfHole (POOH) (Figure 1). The deviceconsists of a one-piece main man-drel, complete with non-rotating,right-hand-spiral stabilizer sleevescovering 360°. The main bodyrotates through the stabilizersleeves, avoiding wear or damageto the casing during pipe rotation.A stainless steel sleeve covers thestrong magnets and is free to rotatebetween the stabilizer sleeves.

The magnets are strong enoughto collect ferrous metal debris whileRIH while still allowing somedebris to be circulated out of thewell once fluid circulation is estab-lished (Figure 2). While POOH, the

magnets collect any remaining fer-rous metal debris which was notcirculated out to surface. The stabi-lizer sleeves provide standoff andprevent the captured material frombeing dislodged by pipe movement.

Figure 1. Figure 2.

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ApplicationsFor retrieving ferrous debris fromthe wellbore, the PUP tool carriersare dressed with powerful rare-earth magnets. The magnetic fieldcovers the carrier area from topto bottom and a full 360° around.Rugged stainless steel gives thecarriers inherent corrosion resist-ance and the ability to be usedmany times.

Because the carriers rotate inde-pendently of the mandrel and drill-string, they will not damage thecasing. Centralizers above andbelow the carriers keep the mag-nets centered in the wellbore sothat no debris is knocked off whilemoving the drillstring.

Tool UseThe PUP Magnet tool has been usedin all types of wells; from verticalto high-angle and in many situa-tions such as milling casing andmaking post-perforation runs. Thetool can also be run in conjunctionwith other debris-collecting toolssuch as the PUP Finger Basket andthe WELL PATROLLER.

The PUP Magnet tool is just oneway in which the basic PUP Toolcan be easily customized to meetthe needs of specific applications.

PUP Magnet Tool

Features and Benefits• Safety Feature: The tool’s

design incorporates an inte-gral pup joint to facilitatetool pickup with standarddrill-pipe elevators and slips

• The mandrel can be engi-neered with either API orhigh-torque connections

• The engineered, fluted designof the centralizers allows largedebris to be removed withoutflow restrictions. M-I SWACOcan eliminate the need for agauge-ring run by placingthe centralizers at drift onthe tool.

• The powerful magnetsare 100% surface-active

• Eliminating externalfasteners reduces the riskof a component dislodginginto the wellbore

• The tool’s large ID enhancescirculation for faster cleanups

• M-I SWACO subs are availablewith either API or high-torqueconnections


PUP Riser Brush PRB

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ApplicationsThe PUP Riser Brush utilizes threeaggressive stainless steel brushrings to remove debris from themarine riser or outer productionriser ID. The design of the tool pro-vides a flow path through thebrush-ring carrier, with the major -ity of the flow passing through65 in.2 (41,935 mm2) of flow areain the brush carrier, minimizingpressure drops above and belowthe tool.

Tool UseThe PUP Riser Brush mechanicallycleans marine risers and outerproduction risers.


design incorporates an inte-gral pup joint to facilitate toolpickup with standard drill-pipe elevators and slips

• Aggressive, non-rotatingstainless steel brushes (synthetic brushes available)

• Workstring can be rotatedand reciprocated with thePUP Riser Brush in the workstring

• Debris can be effectivelycirculated through andaround the tool

• The large mandrel IDenhances circulation

– Available in 133⁄8- through24-in. OD

– Large flow-through areareduces the probabilityof swabbing/surging inthe hole or pulling out ofthe hole

– Eliminates the need for ajunk basket tool above theRiser Brush

– Can be run as a stand-alonetool, and it is typically runin conjunction with thePUP Quick-Trip Boot Basketor PUP Finger Basket to pro-tect the well from debrisre-entering the wellborewhile jetting the BOP

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The wellhead area has been widelyrecognized as one which requiresparticular attention during well-bore cleanup operations performedbefore running the completion. Thistool cleans more effectively thantool designs previously available.

ApplicationsThe BRISTLE BACK Riser Brush fromM-I SWACO WELLBORE PRODUCTIVITY

is used to scour, scrape, wipe andretrieve debris from the riser.

BRISTLE BACK Riser Brush Tool RBT

Features• One-piece main mandrel,

full drill-pipe strength

• Spring-steel bristles scourand scrape

• Flexible nitrile wipers

• Bristle/wiper housing freeto rotate

• Built-in junk catcher

• Simple, robust design

Benefits• Reduces Non-Productive Time

(NPT)

• Ensures surfaces are cleanedand free of debris beforerunning the completion

How it worksThe one-piece mandrel has fulldrill-pipe strength with 4∑-in.(114-mm) internal-flush box-up/pin-down connections forinsertion in a cleanup or drill-string. The bristles and wipersare mounted on a housing thatcan rotate around the main

mandrel if pipe rotation is neces-sary. Because only relatively lowannular velocities between drillpipe and riser are common, evenat high pump rates, looseneddebris is often not circulated outand could fall down the well.

BRISTLE BACK Riser Brush debris samples.


Single-Action Bypass Sub Jetting Tool SABS-JT

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During drilling operations, debrissuch as drill cuttings and mud cakeattach to riser, Blowout Preventer(BOP) and wellhead walls. Removingthese contaminants is crucial toensuring clean cementing and completion operations.

ApplicationsThe SABS (Single-Action BypassSub) Jetting Tool from M-I SWACOWELLBORE PRODUCTIVITY is designedto run in a cleanup string for jettingthe riser, BOPs and wellhead areas.

How it worksThe sub is run with the nozzles inthe closed position. Dropping anactuator ball opens them so thepump rate can be increased to jetthrough the nozzles for cleaning.Dropping a second ball closes the

nozzles to allow flow through thesub and to circulate the string. Theballs remain on seat at all timesbut, when the nozzles are closed,pumping can be resumed throughthe string below.

Features• One-piece, full-strength mandrel


• Designed to boost annular velocity

• Available with 11- or 16-in.(279- or 406-mm) OD sleeve

• Sixteen 0.437-in. jet nozzles at22° phasing

Benefits• When using the SABS Jetting Tool

to clean the riser, wellhead orBOP stack, the large 11- or 16-in.(279- or 406-mm) OD sleevesallow the jets to clean closer tothe profile

• Where it is necessary to reopenand close ports after the initialcycle, two SABS units can be runin tandem

Dual-Action Bypass Sub Jetting Tool DABS-JT

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During drilling operations, debrissuch as drill cuttings and mud cakeattach to riser, Blowout Preventer(BOP) and wellhead walls. Removingthese contaminants is crucial to ensuring clean cementing and completion operations.

ApplicationsThe DABS Jetting Tool fromM-I SWACO WELLBORE PRODUCTIVITY

is designed to run in a cleanupstring for jetting the riser, BOPsand wellhead areas.

How it worksThe DABS Jetting Tool is runin the open position for jettingand cleaning while travelingthrough the BOPs, wellheadand riser. The external jettingnozzles on the sub are thenclosed, by dropping an actuatorball, to allow flow through thesub and to circulate the string.By dropping another ball, theyare reopened when pulling out,allowing jetting of the riser andBOPs. The balls remain on seatat all times.

Features• One-piece, full strength mandrel


• Available with 11- or 16-in.(279- or 406-mm) OD sleeve

• Sixteen 0.437-in. jet nozzles at22° phasing

Benefits• When using the DABS (Dual-

Action Bypass Sub) unit to jetthe riser, wellhead or BOP stack,the large 11- or 16-in. (279- or406-mm) OD sleeves allow thejets to clean closer to the profile

PUP Quick-Trip Jetting Tool QTJT

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ApplicationsThe PUP Quick-Trip Jetting Tool isa mechanical device that enhancesthe cleaning efficiency of the othercleanup tool assemblies by provid-ing jetting action in the BlowoutPreventer (BOP) stack, marine riserand/or the casing/wellhead area.

Tool UsePlace the PUP Quick-Trip Jetting Toolin areas where debris is not easilyaccessible in the BOP. The Quick-Trip Jetting Tool should be used inconjunction with the PUP Quick-TripBoot Basket or the PUP Finger Basketto assist in the removal of contami-nants by preventing debris fromre-entering the clean wellbore.


design incorporates an inte-gral pup joint to facilitatetool pickup with standarddrill-pipe elevators and slips

• Simple design makes thetool easy and safe to handlefor the rig crew

• Spiral jet design ensuresmaximum effective coverage

• No darts or balls required toactivate or deactivate the tool

• Versatile design comple-ments any drilling orcompletion operation

PUP Quick-Trip Jetting Tool OD (in.)

7∑ 9 11 14

Short Trip Jetting Sub STJS

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The Short Trip Jetting Sub fromM-I SWACO WELLBORE PRODUCTIVITY

is designed for mechanical wellborecleanup in risers, Blowout Preventers(BOPs) and wellheads, and is wellsuited for operation from platforms,jackups and land locations.

AdvantagesThe STJS is suitable for operationfrom platforms, jackups andland rigs.

OperationWhen the STJS is in the BOP stack, amaximum of 10 bbl/min should bepumped through the tool. When inthe riser, an optimum rate of 25to 30 bbl/min should be pumped(dependent upon riser ID and drill-pipe OD) to achieve a minimumannular velocity of 80 ft/min(24 m/min) to efficiently carrydebris from the well. As much as25 to 30 bbl/min can be achievedby pumping through the tool aloneor by a combination of pumpingthrough the tool and through thechoke/kill/booster lines.

The STJS is normally run in conjunction with, and above, theWELL PATROLLER or WELL PROTECTOR

tools. Any pieces of debris that aredislodged, but not circulated outduring the cleaning operation,are collected in the WELL PATROLLER

or WELL PROTECTOR tools as they fallor are pulled out of hole.

Features• One-piece mandrel,

full drill-pipe strength


• Six replaceable jet nozzles

• Standard drill-pipe box-up/pin-down connections

• Can be used to jet BOP and risers with 11- and 16-in. (279- and 406-mm)sleeves available

Benefits• Ball drop is not required

to open the tool How it worksThe Short Trip Jetting Sub (STJS)is equipped with standard drill-pipe box-up/ pin-down connec-tions for insertion in a cleanupor drillstring when it is neces-sary to jet. The tool is generallyshort-tripped and run in holeand pulled out of hole with thejets open at all times.


Multi-Action Jetting Tool MAJT

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ApplicationsThe Multi-Action Jetting Tool (MAJT)is a mechanical device that enhancesthe cleaning efficiency of the othercleanup tool assemblies by providingjetting action in the BOP stack,marine riser and/or the casing/wellhead area.

Tool UsePlace the Multi-Action Jetting Toolwhere debris is not easily accessi-ble in the BOP or other areas. TheMAJT should be used in conjunc-tion with the Quick-Trip BootBasket or the PUP Finger Basket toassist in the removal of contami-nants by preventing debris fromre-entering the clean wellbore.

Features and Benefits• Safety Feature: MAJT is

supplied with a 10-ft (3-m)pup joint to facilitate tool handling with standarddrill-pipe elevators and slips

• Spiral jet design ensures maximum effective coverage

• Tool design will allow reversecirculation through the MAJT

• One ball required to activatethe tool

• Index the tool by cyclingthe pumps

• No deactivation ball required

• Versatile design comple-ments any drilling or completion operation

Multi-Action Jetting Tool OD (in.)

8∑ 11 14 16

Cleanup efficiencyincreased by 300%


W E L L B O R E P R O D U C T I V I T Y

Safeguard your downhole assetsUnique solutions that optimize

the quality of your wellbore

and fluid systems

www.miswaco.com

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BRISTLE BACK Surface Wellhead Brushing/Jetting Tool WBJT-SUR

The wellhead area has been widelyrecognized as one which requiresparticular attention during well -bore cleanup operations performedbefore running the completion.This tool ensures that the multi -ple profiles are cleaned and freeof debris prior to completion, reducing the incidence ofNon-Productive Time (NPT).

ApplicationsThe BRISTLE BACK SurfaceWellhead Brushing/Jetting Tool(WBJT) from M-I SWACO WELLBORE

PRODUCTIVITY simultaneously per-forms brushing/jetting functionson surface wellheads.

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How it worksThe tool is constructed on a one-piece, full-strength mandrel withbox-up/pin-down drill-pipe con-nections. Mounted on the mandrelis a brass bristle-impregnatedsleeve with jetting slots, sized forthe various ID changes within thehanger area. The sleeve is rotation-ally locked to the mandrel and provides an annular space for cir-culation between the ID of thesleeve and the OD of the mandrel.A bearing/diverter ring is mountedat the bottom of the bristle sleeve toact as a “no-go” ring when runningin hole.

When the ring bottoms-out inthe hanger area, the circulationis diverted to the jetting slots,and the tool is run to hangerdepth while slowly circulatingand rotating. The bristles sweepthe profiles and sealing surfaceswhile they are being jetted withthe circulated fluid.

When running, the tool shouldbe landed with minimum weight;a small pressure increase will benoted. Rotate and jet for approxi-mately 5 min, then pick up andincrease pump rates to circulateloosened material out of the well.

Debris cannot fall down the wellwhen the landing ring is in contactwith the hanger.

The tool cannot be operated prematurely and, because themandrel is solid, it is safe in well-control situations. A separate jet-ting sub can be run below the toolto allow operation and jetting ofthe blowout-preventer rams beforebrushing-jetting the wellheadhanger area. For extra assurance, aWELL PATROLLER or WELL PROTECTORunit is often run below the tool to collect any debris which falls intothe well when the WBJT is notseated in the hanger area.

Features• One-piece, full-strength mandrel

• Brass bristle-impregnated sleeve

• Integral jetting slots on tool

• Jetting activated by bearing/diverter ring

• Simple and easy to operate

Benefits• Reduces NPT

• Ensures surfaces are cleanedand free of debris beforerunning the completion

Stabilizer Jetting and Circulating Tool SJCT

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One tool that can either boost annular flow velocity or jet the low-pressure housing, high-pressurewellhead, casing-adaptor profilesor Blowout Preventers (BOPs).

ApplicationsThe Stabilizer Jetting and CirculatingTool (SJCT) from M-I SWACOWELLBORE PRODUCTIVITY is designed

to be run as part of the bottomholeassembly of a drillstring when it isdesirable to boost the annular flowvelocity and/or jet the low-pressurehousing, high-pressure wellhead,downhole casing adaptor profilesand BOPs. Other uses includereplacement of a conventionalstabilizer and a secondary-recoverymeans for a bore protector.

How it worksThe SJCT consists of a one-piecebody with two sets of portsand four internal ball seats thatcan be moved to open-close theports when necessary. It can beused for a variety of functionswith the use of different stabilizersleeves. M-I SWACO offers threeversions of this tool:

• Dual Jetting. The tool is Run InHole (RIH) in the closed position.To open the lower set of ports, aball is dropped to the lowest ballseat and pressure is applied. Thepump rate can then be increasedto pump through the lower rowof jets in the tool. To close thelower set of ports, a second ballis dropped and pressure applied.The cycle can be repeated bydropping a third ball and pres-suring up to open the upper setof ports for jetting. A fourth ballis dropped and pressure appliedto finally close the upper setof ports.

• Circulating and Jetting. The toolis RIH in the closed position. To

open circulate at increased annu-lar velocity through the lower setof ports, a ball is dropped to thelowest ball seat and pressure isapplied. To close the lower set ofports, a second ball is droppedand pressure applied. For jet -ting, a third ball is dropped andpressure is applied to open theupper set of ports. A fourth ballis dropped and pressure applied tofinally close the upper set of ports.

• Single Jetting. The tool is RIHin the closed position, and atthe appropriate time, a ball isdropped to the lowest ball seatand pressure applied to open thelower set of ports. The pump ratecan then be increased to pumpthrough the jets in the tool. Tostop jetting, a second ball isdropped and pressure appliedto close the upper set of ports.

In all versions of the tool, the ballsremain on their seats at all times,but when the ports are closed,pumping can be resumed throughthe string below.

Features• Full-strength body


• Available in different versionsfor specific applications

• Secondary function asbore-protector retrieval tool

Benefits• Replacement of a

conventional stabilizer

• Secondary-recovery capabilityfor a bore protector

Posi-Drift Sub PDS

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It is important to check the drift IDof casing while running drill pipein the well. The Posi-Drift Sub hasbeen designed as the ideal tool tomeet this need while not interfer-ing with normal drilling operationsor harming the casing.

ApplicationsThe Posi-Drift Sub from M-I SWACOWELLBORE PRODUCTIVITY is specifi-cally designed to drift the casing notonly during drilling but wellborecleanup operations as well, prior torunning the completion equipment.Customized outside diameters canbe supplied.

Features• One-piece main mandrel

• Free-rotating gauge sleeve

• Standard drill-pipe connections

• Generous fluid/debris bypass

• No square shoulders to hang upin well


• Available for most casingsizes/IDs

Benefits• The tool has been designed to

check the drift of the casingwhile running drill pipe in thewell and during wellbore cleanupoperations, prior to running the completion equipment

• Two or more units can be run con-secutively to “mimic” a packer orother long completion assembly

How it worksThe machined OD of the gaugesleeve matches the API or a cus-tom drift size of the casing. Thetool is built on a one-piece mainmandrel with box-up/ pin-downdrill-pipe connections. Thegauge sleeve is free to rotate onthe mandrel and remain staticwhen the drill pipe is rotated,preventing wear and/or dam-age to the casing ID. There areno bolts, threaded-on rings,clamps or welding used in theconstruction of the tool, sothere are no components toloosen and fall off downhole.The tool should be run aboveother casing-cleaning tools toensure the casing has beencleaned prior to drifting withthe sub.

Landing Sub LS

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Compatible with other tools fromM-I SWACO WELLBORE PRODUCTIVITY,the Landing Sub acts as a “no-go” forlanding and activating other tools.

ApplicationsThe Landing Sub can be used to activate an MFCT device or act asa “no-go” for other tools. This is usu-ally done on a liner-top polished-bore receptacle or other similarinternal-diameter restriction.

Features• Lands on liner top, polished-

bore receptacle or other suitable shoulder

• One-piece, rugged construction

• No restriction in internal diameter

Benefits• Designed to be run below an

MFCT (Multi-Function CirculatingTool) unit and act as a “no-go”device for activating the tool

• Fluted body for generousfluid bypass

How it worksThe unit is manufactured fromone piece with box-up/ pin-down drill-pipe connectionsand has a central set of large,tapered, fluted outer lugs.

Disengageable Mill Assembly DMA

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The Disengageable Mill Assemblyhas been designed to allow liner-hanger-top Polished-BoreReceptacles (PBRs)/Tieback-Bore Receptacles (TBRs) to becleaned and dressed off with noneed for complicated space-out considerations, especially whendrilling inside the liner below.

ApplicationsThe Disengageable Mill Assemblyfrom M-I SWACO WELLBORE

PRODUCTIVITY allows conventionalliner-top PBRs/TBRs to be dressedoff or cleaned in the normal man-ner. This unique tool allows two different PBR/TBR combinationsto be dressed off on the same run,eliminating a separate trip foreach receptacle.

Features• Allows two different PBR/TBR

combinations to be dressed inone run

• Has a set of “trip buttons” whichprevents premature release of themills from the mandrel

• Enables liner-hanger PBRs/TBRs to be cleaned and dressedwithout the need for complicatedspace-out considerations

• Permits drilling in the liner belowwithout “no-going” on PBR/TBRas a restriction

Benefits• Saves valuable rig time by

eliminating trips

• Drilling is enabled in the linerbelow without “no-going” onPBR/TBR as a restriction

How it worksAfter dressing off and cleaning thePBRs/TBRs, additional weight isapplied and the inner mandrelof the mill set shears through themills, allowing the drill pipe aboveto be tripped in the hole further.The mill set remains in the PBR/TBR to protect the already cleanedreceptacles while other drill pipeis tripped in the hole and/orrotated. The ability to disengagethrough the upper PBR/TBR meansthat a conventional set of mills canland on another PBR/TBR belowthe first, and allow it to be dressedin the conventional manner. Thedisengageability allows drilling-milling to take place in the linerbelow without “no-going” or land-ing on the existing liner top andpreventing further progress inthe hole.

The Disengageable MillAssembly left behind in thePBR/TBR is then collected by theinner mandrel as the drill pipe isretrieved from the well. A uniquefeature of the unit is a set of “tripbuttons” that prevents the sepa -ration of the mills from the man-drel until the mill set is correctlypositioned inside the relevantPBR, thus preventing unwanted,unplanned premature release.

When the unit has been locatedand left inside the PBR, additional“no-go”/landing subs can be spacedout to land and stop. This allowsactivation of other weight-set toolssuch as the MFCT (Multi-FunctionCirculating Tool).

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The Bearing Sub allows the entiredrillstring to be rotated while cir -culating with the Standard-TypeMFCT (Multi-Function CirculatingTool) device in either the open orclosed position.

ApplicationsIn addition to allowing the drillstring to be rotated while

circulating with the Standard-TypeMFCT device, the Bearing Sub fromM-I SWACO WELLBORE PRODUCTIVITY

prevents debris from enteringthe liner when the Bearing Subis located on the liner top.


Features• Lands on liner-top polished-

bore receptacle or other suitable shoulder

• No internal connections

• No restriction on internal diameter

• Simple, rugged construction

• Fluted mandrel withbronze bearings

• Utilizes AISI steel for body andparts; SAE 660 bronze bearings

Benefits• Allows the whole drillstring to

be rotated while circulating withthe Standard-Type MFCT device

• When the Bearing Sub is locatedon the liner top, prevents debrisfrom entering the liner

How it worksThe sub lands on the liner-toppolished-bore receptacle or othersuitable shoulder and allows theMFCT tool to be sheared openand remain open while circulat-ing. When resting on the sub’sshoulder, the whole string canbe rotated as fluid circulatedthrough the MFCT ports. When

the string is lifted, the MFCT portsclose and the Bearing Sub leavesthe shoulder and opens the flowpath, allowing circulation downthe string and up the liner andcasing annulus over the liner top.The whole string can still berotated with the Bearing Suboff the liner top.

Bearing Sub BS

Pressure Shear Sub PSS

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Features• One-piece, full-strength body

• Full pressure integrity —no holes or ports in body

• Ball retained on seat in tool

Benefits• Enables pressure to be applied

to other tools in the stringwhen required

Sometimes, a reliable source ofadditional pressure inside the drill-string is required to activate othertools. The Pressure Shear Sub isdesigned to meet this need.

ApplicationsThe Pressure Shear Sub (PSS) fromM-I SWACO WELLBORE PRODUCTIVITY

is specifically designed to be runin a drillstring to apply temporarypressure for actuating anothertool above the PSS, such as anear-bit reamer.

How it worksThe tool consists of a one-piecebody with an internal inner- andouter-sleeve arrangement. The toolis run in the initial position, whichallows flow through the string.When additional pressure isneeded inside the drillstring, theball is dropped and landed on theinner sleeve. Pressure is then builtup behind the ball to activate the

other tool above the PSS. Once theother tool has been actuated, thedriller increases fluid pressure untilthe predetermined shear pressure isreached. The inner sleeve shears andmoves downward, re-establishingflow to the bit.

The PSS is used to apply addi-tional pressure required to activateother tools in the string.

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RAZOR BACK CCT with Integral Top Dress Mill RBTDM

The RAZOR BACK CCT (CasingCleanup Tool) with Integral TopDress Mill from M-I SWACOWELLBORE PRODUCTIVITY ensuresthat the casing is scraped to a pointvery close to the top of the liner sothat subsequently installed liner-top tieback packers will be set andsealed in a clean, properly preparedsection of casing.

ApplicationsThis tool is designed as a mechani-cal aid for cleaning wellbore casings

and dressing liner-top Polished-Bore Receptacles (PBRs). The toolis HTHP-compatible and not vul -nerable to chemical or acid attack.It can be run as a stand-alone deviceor in conjunction with circulatingtools, BRISTLE BACK CCT units andchemical cleaning agents. TheRAZOR BACK CCT unit is very robustand effective in removing mudsolids, heavy cement sheath, heavypipe scale and perforation burrsfrom the casing ID, in addition todressing off the liner-top PBR.

Features• Secure components

• Self-centralizing, flexible-blade lantern

• Available in all common casing-liner sizes; completewith top dress mill for all common PBR sizes


Benefits• Removes cement and mud

solids, burrs, pipe scale


• Scrapes casing very closeto the liner top

How it worksThe RAZOR BACK CCT device consists of a one-piece body, anon-rotating stabilizer sleeve,a non-rotating scraping bladedlantern, and an integral liner-top dress mill. The body rotatesthrough the upper stabilizer sleeveto avoid wear/damage to the casingduring pipe rotation. The bladedlantern is strong and flexible and

provides the force to contact andclean 360° of the pipe ID. Thelantern is self-centralizing insidethe pipe to ensure equal cleaningforce at all angles of inclination.No clamps, bolts, threaded rings,springs or multiple scraper blocksthat may be lost downhole areused in tool construction.


VARO BACK Combination Casing Cleanup Tool VB

52


Features• Removes mud solids,

cement sheath, pipe scaleand ferrous debris



Benefits• Scouring action ensures a

clean pipe wall


• Suitable for remote locationsdue to its field-redressable characteristic

The VARO BACK* Combination CasingCleanup Tool from M-I SWACOWELLBORE PRODUCTIVITY is amechanical aid for cleaning well-bore casings. It consists of a one-piece body onto which brush pads,scraper blades, magnet pads andstabilizer sleeves can be added. Thescraper blades and bristle pads arestrong, durable and provide theforce to contact and clean 360degrees of the pipe ID. The HTHP-compatible VARO BACK tool is cen-tralized inside the pipe to ensureadequate cleaning force at allangles of inclination.

ApplicationsThe VARO BACK tool can be run as astandalone device or in conjunctionwith circulating tools and chemicalcleaning agents. The unit is veryrobust and effective in removingmud solids, heavy cement sheath

and heavy pipe scale from the ID ofcasing. The tool will catch and holdsmall quantities of ferrous material.

OperationThe VARO BACK Combination CasingCleanup Tool is run as an integralpart of the cleanup string to scrapeand brush the casing as the pipe isrun in the hole. The tool operatesas the string is reciprocated. Whilerunning in the hole, it is good prac-tice to break circulation and recipro-cate the pipe regularly (for exampleevery 5,000 ft [1,524 m]) to disperseany debris buildup.

When running or pulling the toolfrom a floating rig, ensure that thetool is not in the BOP/wellhead areawhen making or breaking a connec-tion on the rig floor. This will avoidany damage to the well or the tooldue to rig heave.

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How it worksIn the case of bridge plugs orcement retainers, the tool isattached to the bottom of thepacker. As the device is run inhole to setting depth, it brushesand cleans the casing or tubing.The setting area for the packer or

plug can be thoroughly cleanedby reciprocating the device priorto the setting sequence.

The Disposable BRISTLE BACKCCT unit is run in conjunctionwith drillable or permanent bridgeplugs or cement retainers.

Features• Removes mud solids, cement

sheath and pipe scale


• Supplied with customer-requested connection

• Drillable with polycrystallineor rock bits

Benefits• Area for setting plug or packer

can be thoroughly cleaned byreciprocation immediately priorto setting

The area in which a plug/packeris to be set often requires thoroughcleaning by reciprocation prior tothe setting sequence. Having theoption to run a drillable cleanuptool in conjunction with drillableand permanent bridge plugs andcement retainers can greatlyimprove the reliability ofthe setting operation.

ApplicationsIn addition to running in conjunc-tion with drillable or permanentbridge plugs or cement retainers,the Disposable BRISTLE BACK CCT(Casing Cleanup Tool) unit fromM-I SWACO WELLBORE PRODUCTIVITY

can be attached to cementingplugs to brush-clean the pipewall as the plugs are pumpeddown the casing/ tubing duringcement-displacement operations.

Disposable BRISTLE BACK CCT DBB


Patent Information

54

WELL PATROLLER*Downhole Filter and Debris Extraction ToolDesigned to enhance the per -formance of the wellbore cleanupand validate the effectiveness ofthe process.

UK and International Patents and Patent Applications

GB2335687B; GB2373529B; GB2336612B

U.S. Patents and Patent Applications

US6250387; US6347667

M-I SWACO has taken the lead in introducing a comprehensive range of mechanical wellbore cleanup tools. Thesetools are precision-engineered, problem-solving products which are specifically built for precompletion wellborecleanup operations. An international portfolio of broad base patents and patent applications, providing protectionfor these tools, is summarized below.

MFCT* Multi-FunctionCirculating ToolDesigned to boost achievable flowrates in the well during the cleanupand displacement process.


GB2342666B; GB2341405B; GB2323111B; GB2326180B; GB2339814B;GB2272923C


US6279657; US6253861; US6102060; US6152228; US6454009

RAZOR BACK*Casing Cleanup ToolA casing scraper designed to bemore effective and robust thanold-style conventional tools.

BRISTLE BACK*Casing Cleanup ToolIncorporates all the unique featuresof the RAZOR BACK in a brush-typecasing scraper for when high levelsof cleanliness are required.


GB2334541B; GB2336612B; GB2373529B; GB2340862B; GB2354272B;GB2359105A; GB2346629B; WO02/35055


US6227291; US6347667; US6152220; US6401813;

US6530429; US6152221

BRISTLE BRUSH*Casing Cleanup ToolA brush tool designed for usewhere high levels of cleanlinessare required.


GB2338257


US6209647; US5947203; US5829521;

US6464010

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SABS* Single-Action Bypass SubDesigned to be run in a cleanupstring where it is desirable to boostthe flow velocity above a liner orcasing crossover.

DABS* Dual-Action Bypass Sub Designed to be run in the drillstringwhere it is desirable to jet the riserand BOPs while running in and/orpulling out of the hole.


GB2341405B; GB2323111B; GB2327445B


US6253861; US6102060; US6220357

MAGNO BACK*Casing Cleanup ToolA magnetic downhole tool for usein wellbore cleanup operations toretrieve ferrous debris.


GB2350632A

WELL COMMISSIONER* CasingCleanup and Inflow Test ToolA tool designed to allow aninflow or negative test to becarried out on a liner overlapand shoe-track on the same tripas the wellbore cleanup.


GB2374366A

WELL PROTECTOR*Debris Extraction ToolDesigned to protect the well frompotentially harmful debris duringthe wellhead/BOP jetting process.


GB2327445B; GB2335687B


US6220357; US6250387

Completions GUARDIAN*Completions tool developed foruse in wells where a high degreeof cleanliness is required when run-ning and setting production packersand other completion equipment.


GB2335687B; GB2373529B; GB2336612B


US6250387; US6347667

VALIDATOR* Downhole Fluid Sampling ToolDesigned to check and validate thecleanliness of the completion fluidleft in the well.


GB2367844A


US6609569

Patent Information

56

RIDGE BACK* Burr MillWellbore cleanup tool developed foruse in the post-perforating phase ofa well to deburr perforations for thesubsequent passage of packers orother close tolerance equipment.


GB2346629B


US6152221

SJCT* Stabilizer Jetting and Circulating ToolDesigned to be run as part of theBHA of a drillstring when it is desirable to boost the annular flowvelocity and/or jet the low-pressurehousing, high-pressure wellhead,downhole casing adapter profilesand BOPs.


GB2341405B


US6253861

CENTURION* Circulating ValveDeveloped for use in the drillingand completion phase of wellswhen high circulating rates or analternative flow path are required.


GB2341405B; GB2326180B; GB2309470B; GB2325682B


US6253861; US6152228

Other tools UK and International Patents and Patent Applications

GB2346401A; GB2338734A; GB2358208A; WO02/081857; WO03/036014;WO03/040516; GB2340864B; GB2338257; GB2354542B; GB2309470B;GB2325682B; W002/61236


US6343648; US6302214; US5829521; US5947203; US6464010; US6453996

Disengageable Mill AssemblyDesigned to allow more than oneliner-top PBR to be cleaned anddressed off during the same wellbore cleanup trip.


WO03/062582

Additional Patent Applications are pending in other jurisdictions.

Specialized tools for wellbore productivitySpecialized tools for wellbore productivitySmoother completions, less NPT, lower costsFrom the Gulf of Mexico and Saudi Arabia to the North Sea and West Africa, the

well-cleanup tools and services offered by M-I SWACO* are helping operators save

time and money on their completions. The result: faster completions in less time

with lower costs.

www.miswaco.com

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Locations

58

Texas5950 North Course DriveHouston, TX 77072Tel: +1·281·561·1300Fax: +1·281·561·1556

Northwoods Industrial Park – West12243 A FM 529Houston, TX 77041Tel: +1·713·983·1700Fax: +1·713·983·1720

8150 North Central Expressway, Suite 675Dallas, TX 75206Tel: +1·214·691·1396Fax: +1·214·368·2139

4401 E. Hwy 80Midland, TX 79705Tel: +1·432·687·5757Fax: +1·432·687·2156

Louisiana1615 Poydras Street, Suite 830New Orleans, LA 70112Tel: +1·504·524·4516Fax: +1·504·561·6393

305 Ida RoadBroussard, LA 70518Tel: +1·337·837·8655Fax: +1·337·837·5812

1819 W. Pinhook Road, Suite 205Lafayette, LA 70508Tel: +1·337·233·1714Fax: +1·337·233·1769

Oklahoma727 N. Morgan RoadOklahoma City, OK 73127Tel: +1·405·324·5360Fax: +1·405·324·4071

Colorado410 17th Street, #800Denver, CO 80202Tel: +1·303·623·0911Fax: +1·303·572·7044

4221 W. Centenial Parkway Rifle, CO 81650Tel: +1·970·625·8326Fax: +1·970·625·3904

Alaska721 West First AvenueAnchorage, AK 99501Tel: +1·907·646·3201Fax: +1·907·279·6729Toll-Free: 877·274·5564

51490 Wik RoadP.O. Box 7364Nikiski, AK 99635Tel: +1·907·776·8680 (24 hr)Back line Tel: +1·907·776·7637Fax: +1·907·776·5698

M-I SWACO North Slope Operations100 Old Spine RoadDeadhorse, AK 99734Tel: +1·907·659·2292Fax: +1·907·659·2292

Canada700 2nd Street SW, 5th FloorCalgary, Alberta T2P 2W2CanadaTel: +1·403·290·5300Fax: +1·403·290·5323

Trinidad#403 Pacific Avenue,Point Lisas Industrial Estate,Point Lisas,Trinidad,West IndiesTel: +1·868·679·8200Fax: +1·868·679·8320

86 Abercromby StreetPort of SpainTrinidad & TobagoTel: +1·868·624·5302Fax: +1·868·624·3254

BrazilM-I DRILLING FLUIDS DO BRASIL, LTDA.Rua 19 de Fevereiro, n 30, 4 andarBotafogoRio de Janeiro, RJ CEP: 22280-030BrazilTel: +55·21·3094·5700Fax: +55·21·2266·5756

Rua Jesus Soares Pereira, n 507Costa do SolMacaé – RJCEP: 27923-370BrazilTel: +55·22·2105·6700Fax: +55·22·2105·6742

Middle EastM-I SWACO EHSExecutive Building 3Oilfield Supply CenterJebel Ali FreezoneP.O. Box 213379Dubai — UAETel: +971·4·8831922Fax: +971·4·8831939

West AfricaM-I OVERSEAS LIMITED –SOUTH AFRICA BRANCH101 Newport HouseCnr Ebenezer & Prestwichs RoadGreen Point 8051Cape Town, South AfricaTel: +2721·4199151Fax: +2721·4199149

North AfricaM-I OVERSEAS LIMITED – EGYPT4 El Saha El Shabia StreetMaadi, Cairo, EgyptTel: +202·23588463

23588416 23597776

Fax: +202·23585944

59

Far EastM-I DRILLING FLUIDS (MALAYSIA) SDN. BHD.Suite 13.2, West Wing, RohasPerkasaNo. 8, Jalan Perak, 50450Kuala Lumpur, MalaysiaTel: +603·2161·7655Fax: +603·2161·7485

IndonesiaP.T. M-I INDONESIABeltway Office ParkBuilding A, 3rd FloorJl. Let. Jend. T.B. Simatupang No. 41Jakarta 12550, IndonesiaTel: +62·0·21·780·6578Fax: +62·0·21·780·6608

AzerbaijanAZERI M-I DRILLING FLUIDS COMPANY LTD.201 Murtuza Mukhtarov StreetFloors 4, 5, 6Baku, Azerbaijan 1065Tel: +99412·497·4213Fax: +99412·497·2221

United KingdomEndeavor DriveArnhall Business ParkWesthillAberdeenshireAB32 6UFTel: +44·0·1224·742200Fax: +44·0·1224·742288

HollandM-I DRILLING FLUIDS INTERNATIONAL B.V.Pannekeetweg 171704 PL HeerhugowaardThe NetherlandsTel: +31·725763120Fax: +31·725763131

NorwayM-I SWACO NORGE ASRisavika Havnering 2244056 TanangerTel: +47·51·64·89·90Fax: +47·51·64·89·99


SMC.1900.0802.R1 (E) 3.5M Litho in U.S.A.

P.O. Box 42842Houston, Texas 77242-2842

Tel: 281·561·1300Fax: 281·561·1441

www.miswaco.comE-mail: [email protected]

Technology Centers:

HOUSTON, TEXASTel: 281·561·1300 · Fax: 281·561·1441

ABERDEEN, SCOTLANDTel: 44·1224·334634 · Fax: 44·1224·334650

STAVANGER, NORWAYTel: 47·51·577300 · Fax: 47·51·576503

This information is supplied solely for informational purposes and M-I SWACO makes noguarantees or warranties, either expressed or implied, with respect to the accuracy and useof this data. All product warranties and guarantees shall be governed by the Standard Termsof Sale. Nothing in this document is legal advice or is a substitute for competent legal advice.

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