complete sti brochure usa10 08-2014

Complete Line of

OEM Replacement

Shaker Screens

SCREEN TECH INTERNATIONAL LTD. CO.

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API RP 13C (ISO 13501) Compliant Screens

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Shaker Screens Your First Line of Defense

Shaker Screens are used during the well

construction phase of every drilling project

and in conjunction with the Shale Shaker are

the first line of defense in solids removal from

the drilling fluid system.

Using proprietary mesh technology our

products deliver reliable solids removal

capability combined with high fluid processing

rates and outstanding operational life.

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Reduce Drilling Costs

Screen Tech International

supports the API RP 13C screen

labeling practice and has

implemented this labeling on our

complete screen panel product

offering.

API’s NEW API RP 13C (ISO

13501), the industries standard for

physical testing and labeling

procedures of shaker screens.

Initially screens were easy to

describe. They were square mesh

made with market grade wire.

The mesh size was the number of

openings per inch in two

directions.

The new recommended screen labeling

practice provides the following API RP 13C

information:

API Designation

Conductance in kD/mm

D100 Value

Non-Blanked Open Area in Square

Feet

API RP 13C (ISO 13501) Compliant Screens

API

Designation (micron opening

size)

Manufacture’s Name

Non-blanked Area: xx (ft2)

Conductance: yy (kD/mm)

Manufacture’s

Designation

Country of

Manufacturer

Conforms to API 13C

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API RP 13C (ISO 13501) Reference Chart

API RP 13C Part Number Conversion Chart

STI Cloth

Mesh

Designation

API RP

13C

API RP 13C

d100

(micron)

DX 24 API 18 931

DX 38 API 35 544

DX 50 API 45 355

DX 70 API 60 270

ST 84 API 60 254

ST 110 API 70 225

ST 140 API 80 165

ST 175 API 100 156

ST 210 API 120 125

ST 230 API 140 116

ST 250 API 170 88

DX 250 API 200 70

DX 270 API 230 66

DX 325 API 325 44

Table 5 (found on page 40 and 41 of API RP 13C)

D100 Separation and API

Screen Number

D100 Separation

(Microns) API Screen

Number

>780,0 to 925,0 API 20

>655,0 to 780,0 API 25

>550,0 to 655,00 API 30

>462,5 to 550,0 API 35

>390,0 to 462,5 API 40

>327,5 to 390,0 API 45

>275,0 to 327,5 API 50

>231,0 to 275,0 API 60

>196,0 to 231,0 API 70

>165,0 to 196,0 API 80

>137,5 to 165,0 API 100

>116,5 to 137,5 API 120

>98,0 to 116,5 API 140

>82,5 to 98,0 API 170

>69,0 to 82,5 API 200

>58,0 to 69,0 API 230

>49,0 to 58,0 API 270

>41,5 to 49,0 API 325

>35,0 to 41,5 API 400

>28,5 to 35,0 API 450

>22,5 to 28,5 API 500

>18,5 to 22,5 API 635

As an independent replacement screen manufacturer, Screen Tech International has taken extensive

steps to follow the guidelines established by the American Petroleum Institute for proper labeling with

“Replacement Shaker Screens”. API RP13C compliance in the testing procedure means that

manufacturers test certain meshes using the spelled criteria within the test. The manufacturers then label

both their screens and their screen packaging with the results of the test and are then API compliant.

The procedure tests mesh performance down to a specific micron. That micron number falls into a

range of microns. Screen tech International compliant meshes are listed above, along with Table 5,

page 40 and 41 of the testing procedure to show the breakdown of API numbers and the range of

microns that fall within the API number.

Please note: Screen Tech International acknowledges that lab tests and actual performance of the

screen in the field are completely separate, and not to be interpreted as being the same. The API

designation is merely a unified labeling system set out to provide a common thread amongst all of the

screen manufacturers. In no way does the API designation determine actual screen life, or the ability of

one screen to outperform another.

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Don’t “Screen Around”

Screen Tech International offers quality, reliability and performance in a direct replacement for OEM screen panels

STI manufactures OEM replacement screens for most

shale shakers on today’s market. STI manufactured

replacement screen panels for OEM shale shakers

combine proven mesh combinations with an

innovative, precision punched patterned plate to

improve separation efficiency of the shaker, while

extending screen life. These STI manufactured OEM

replacement screen panels are engineered to meet

the exact design specifications of the OEM shale

shaker and can be installed directly on the unit using

the stock tensioning system in place. STI

manufactured replacement screen panels are

available in a variety of mesh combinations to best

suit the needs of your drilling program. STI is capable

of manufacturing custom “odd size” screen panels for

obsolete shakers that are still operation.

Screen Tech International lineup includes, but not limited to:

Derrick® Equipment Company

NOV® Brandt™

National®

M-I SWACO®

Fluid Systems®

Vortex Fluid Systems®

Tri-Flo® International

KEMTRON®

Double Life®

Harrisburg®

Triton®

DFE®

RUFF®

Weatherford®

SCOMI®

And many others…

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Screen Panel Packaging, Weights and Dimensions

Brand Series/Type Dimensions

(in/cm)

Weight

(lbs./kg) Pcs/Box

Derrick®

FLC-2000™ (48x30)

41.25” x 27.5”

104.775 x 69.85

30 / 14

3 (three)

Derrick®

FLC-500™ -

503/504/513/514 41.25” x 27.375”

104.775 x 69.53

44 / 20

3 (three)

NOV® Brandt®

Cobra®, Cobra®II,

Cobra®S, Mini Cobra®,

King Cobra®, King

Cobra®II, King Cobra® +,

LCM-3D CS

25” x 49”

63.5 x 124.46

40 / 18

1 (one)

NOV® Brandt®

VSM300® (Primary)

27” x 35”

68.58 x 88.9

35 / 17

1 (one)

NOV® Brandt®

VSM300® (Scalping)

27” x 37”

68.58 x 93.98 36 / 17

1 (one)

NOV® Brandt®

Venom®

25” x 49”

63.5 x 124.46

34 / 16

1 (one)

National®

D235, D285P, D285DM,

D285 OCD, and

Prospector™ by

Weatherford®

46.25” x28”

117.475 x 71.12

40 / 18

1 (one)

M-I SWACO®

Mongoose PT®

Mongoose PRO®

Meerkat PT®

23” x 46”

58.42 x 116.84

35 / 17

1 (one)

Fluid Systems®

All Series

42” x 29”

106.68 x 73.66

32 / 14

1 (one)

Vortex Fluid Systems®

All Series

24” x 46.25”

60.96 x 117.475

32 / 14

1 (one)

DFE

SCR-01, NNF,

Harrisburg Liner

Motion, Triton

48.25” x 28.25”

122.55 x 71.55

40 / 18

3 (three)

NOTE: Dimensions noted are actual screen panel dimension and does not represent overall packaging

dimensions.

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The Solids Control process may seem like a complicated matter; but, in fact, it is very simple. The object of the exercise is to remove as many drill solids at the flow line as possible. If solids slip past the shaker they will be sheared (broken up) either by centrifugal pumps, agitators or drill bit on the next circulation. This makes the solids smaller and more difficult to remove the second time they pass through the system. The more low-gravity solids removed at the flow line, the better. In order to remove the maximum amount of solids, all solids control equipment must be in good operating order. You can help keep these units in good working order by periodically inspecting the machine and reporting your findings to the pusher.

The Flow Line Shaker is the primary line of defense in removing these solids. This apparatus is designed to remove the largest particle sizes, generally larger than 72 microns. These units run at different speeds, strokes and G-Forces. Without getting into too much detail, stroke is the amount of movement in the shaker bed. G-Force represents the amount of energy applied to the shaker bed. And speed is dictated by motor speed. While the shaker will separate better at higher G forces, shaker screens are subjected to higher amounts of abrasion from solids and mechanical force. G-Forces in excess of 7 and above have been shown to be detrimental to screen life and the shaker itself. Most shale shakers run between 3.5 G’s and 6.5 G’s. With today’s screens, we can expect screen life of 4 to 14 days depending on loading conditions and mud weights.

Screen performance is measured by the amount of solids that pass through them (conveyance) and the specific size material they are separating (cut point). The cut point is measured in microns. In order to illustrate just how small the screen openings are, please consider these facts, knowing that 26,000 microns equals one inch - a human hair is approximately 90 microns in diameter. Talcum powder is roughly 30 microns in diameter; thus, performance of solids control equipment is measured by its ability to remove particles in these size ranges.

As the primary separator, the shaker will remove the primary share of drilled solids if screened correctly. There are no rules set in stone; but, there are many practical methods of sizing shaker screens. Normally, screen progression begins with a shaker screen having a larger opening, and then use progressively finer meshed screens throughout the well. In most cases the consultant or mud engineer will determine what initial screen size is desired.

Each shaker is slightly different in appearance, but each operates in very similar fashion. Mud is introduced into the “Possum Belly” from the flow line. It is then channeled over a weir gate, onto the energy plate, and finally over the screens. As flow rates are commonly up to 350 G.P.M. per shaker, the shaker screens need to fit well and seal totally on the shaker bed. As fluid then passes over the shaker screens, separation of the drilled cuttings from the actual drilling fluid is accomplished.

The fluid should completely cover at least the first 2 screens of the shaker, leaving the 3rd screen to dry the cuttings somewhat before being discharged. As screens are made up of at least 3 layers of wire, there is some abrasion between meshes. Running fluid over screens keeps the wire cloth lubricated, extending life.


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When and if you are visiting the rig, especially on initial sales, try to visually inspect the shakers for missing or damaged components. Check screen cushions and bed seals for wear. A little time on the tanks allows everyone involved to know that you are interested in more than just selling screens.

Most people do not realize how much material the shakers actually process. If we take a 12-¼ inch hole being drilled to a depth of 8,500 feet, the screens have conveyed 382.56 tons of drilled material. This doesn’t include the constant weight of fluid used to remove cuttings from the well bore. Most of this material is very abrasive on the top layer of wire cloth. If you have ever tried to tear a piece of 210 mesh wire cloth, you will understand how fragile it really is. So when you hear a consultant ask, “why did my screens fail in 3 days?”, remember the figures listed above before you decide on premature failure of a screen.

Most shakers use either balanced elliptical or linear motion. Linear motion is common and is expressed as a straight line of movement by the shaker basket. The basket moves horizontally conveying solids in a straight line motion. Balanced Elliptical motion uses circular and linear motion to create an elliptical motion. Depending on the formation that is being drilled through, each motion has its advantages and disadvantages. Regardless of what motion the machine, they all use the same type screens and have similar problems.

Most problems you will encounter in the field are traced back to operator error or abuse. Most rig personnel have little or no solids control knowledge, and they rely on more experienced hands and mud engineers that have only basic knowledge about the solids control equipment they run. A derrick hand has to work the rig’s derrick board , mix all the chemicals for drilling mud, keep the mud to the proper weight, keep the mud engineer and consultant informed of mud properties, watch for increase or decrease in mud volume, and run all equipment on mud pits as well as keep an eye on the mud pumps. In other words he doesn’t have time to baby-sit shale shakers. If they are running, he is happy. He does not really care what screens are on the shaker or mud cleaner. Realize that he can help you sell your shaker screens if he does not have to change them every day. So walking the tank and watching for shaker problems will help you both. Making a tool pusher aware that he is missing a tension bolt, will keep your screen from failing, which makes the derrick hand’s job easier, which gets you a “thumbs up” when the company man asks how your screens are doing.

As screens are being installed on the shakers, no tools, boards, bolts or any other items should be placed on the wire cloth. Make sure screens have been properly sealed against the shaker bed. Make sure the screen is secure and not loose fitting. A loose fitting screen will not convey material. Make sure there are no hammer strikes directly on screens, using the wedge blocks. Look for missing or bad tension bolts on the units that use them. Missing tension bolts causes uneven tightening that shortens screen life.


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Some misunderstood things about Shale Shakers.

“Replacement Screens Will VOID a Warranty” The Original Equipment Manufacturers (OEM) are trying to force the issue on using their screens on their own equipment. It has been said that in most cases the OEM will cancel the warranty on their shakers if you do not use their screen. It is our understanding that NONE of the OEM ever warranted their shaker baskets. To our knowledge, when asked, they will admit the shaker frame or bed is warranted for defects such as cracking, warping etc., but not for wear.

“Replacement Screens Will Ruin the Shaker Basket” All screens wear out the cushions, support rubbers, seals, cross and side supports etc. of the shale shaker. When asked about replacement screens, OEM’s cite that wear on these items occur faster using screens other than OEM screens. We must remember that these items are expendable items and are to be replaced at frequent intervals. How quickly depends on several factors. Screens cannot be the sole factor considered for replacement of these items.

“The “Replacement” screens are heavier than the OEM screens, thus somehow impacting the life and performance of the shaker.” Every manufacturer of shaker screens builds their screens in a different manner. Some screens are lighter than others, and some screens are heavier than others. Some are made of a lightweight composite material, while some are made from steel tubing. The myth here is that the weight difference between the OEM vs. Replacement Screen would somehow affect the life of the shaker itself. For these purposes, let me offer you the following example:

If a shale shaker is under normal operating conditions, the shaker bed will be flooded with at least 50 gallons of fluid. Some shakers will run 84 gallons of fluid. At 10ppg this equals 840 pounds displaced over the 4 screens, an average of 210 pounds of fluid per screen.

Now, does anyone really think 8-10 pounds in screen weight will matter? If so, how can the shaker withstand 17ppg mud weight with an average of 357

pounds of fluid per screen?

As you can see the weight between OEM screens vs. “Replacement” screens really does not impact the shaker in field application.

There are a number of other myths about screens and shakers. Just remember when you hear the next tidbit of “free advice”, be sure and “check the price.”


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TEN MOST FREQUENT CAUSES OF PREMATURE SCREEN FAILURE

1. Personnel improperly trained on handling, storage, maintenance and installation of deck (channel/crown) rubbers and screens 2. Careless storage of screen panels prior to use 3. Screen damage before use from improper handling during installation 4. Deck (channel/crown) rubbers improperly installed 5. Deck (channel/crown) rubbers dirty, worn or missing 6. Dried cuttings or drilling fluid left on screen during shutdown or shaker(s) 7. Personnel walking on screens or using the shaker as a work table 8. Tools being dropped on screens 9. Extremely high mud weights or heavy solids loading 10. Defective or improperly manufactured screens


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SUGGESTED GUIDELINES FOR MAXIMUM SCREEN PERFORMANCE

Operations and Maintenance for Improved Screen Life

1. Make certain that the components of the screen tensioning system, including any rubber supports, nuts, tension bolts, rails, springs, etc., are in place and in good shape.

2. Install screens according to the equipment manufacturer’s recommended installation procedure.

3. Ensure the deck rubber support seals are not worn or missing. 4. Lubricate and maintain the unit according to the equipment manufacturer’s instructions. 5. Check the tension of screens at 1, 3, and 8 hours after installation and hourly thereafter. 6. Check the tension of and adjust the drive belts according the equipment manufacturer’s

instructions. 7. Wash screens at the beginning of a trip so as not to allow fluid to dry on them. 8. Check fluid bypass valve and other places for leaks around the shaker screens. 9. Remove drilling-fluid buildup from the vibrating bed, vibrators, and motors. 10. Make certain that no hose, cables, etc., are in contact with the vibrating bed. 11. Drilling fluid should cover most of the screen. If drilling fluid covers only one fourth or one

third of the screen, the screen is too coarse. 12. A screen with a hole in it should be repaired or replaced at once. 13. Holes in screens can be plugged. (Rig hands should not punch holes in screens to stop fluid from running off the edge of

the shaker) 14. Shaker screen replacements should be made as quickly as possible. If possible, change the

screen during a connection.

Troubleshooting Equipment for Proper Screen Performance

1. Are shaker motors set exactly alike? Are motor speeds the same? Remove covers and check weight indicators. The speed could be set differently on a replaced motor.

2. Motors should turn in opposite directions. 3. Float mounts should not be overfilled. If air pressure is too high, basket movement is

affected. Pressure should be between 15 – 20 psi. 4. Check wedge blocks for wear. Wedge should fit roughly in center of screen when tight. 5. Check shaker bed, it should be as level as possible.


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Partial Client List

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Contact Information & Stocking Points

CONTACT INFORMATION STOCKING POINTS

United States of America ● Tulsa, Oklahoma

● Houston, Texas Singapore Oman ● Muscat

UAE ● Dubai

● Abu Dhabi

Kuwait

Iraq

India ● New Delhi Indonesia ● Jakarta

● Batam

● Duri

● Balikpapan

● Surabaya Australia ● Perth

● Brisbane

Screen Tech International, Inc. 11509 E. Pine Street

Tulsa, Oklahoma 74116

United States of America

Phone: +1-918-234-0010

Fax: +1-918-234-0015

Web: www.stiscreens.com

Matt Peters – [email protected]

Tom Remy – [email protected]

Scott Crawford – [email protected] -

complete sti brochure usa10 08-2014

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