wf_fishing open hole

© Weatherford International, Inc. All rights reserved.

DRILLING & INTERVENTION SERVICES

Basics of FishingOpen Hole Fishing



Responsibilities of the Fishing Tool Supervisor

Gather details and conditions of the following:

• Open Hole • Casing • Mud • Work String • Drilling Jars• Operation at time of incident• Rig Details• Additional Tubulars

Open Hole Fishing



Rig Details Pump Detailsrotarty amp = 40 ft*lb 2 x 7"x14" stroke d.a. triplexMax RPM 250 pump 1 stroke = 8.05 galpull cap. N/A max flow 110 SPM / pump

max pressure 3600 psiworkstring5" 19.50# S-135 DP 13.6 lb/gal wb mudT.J. O.D. 6 1/2" 53 fvis 11 plastic yieldT.J. I.D. 3 1/4" limited dehydrationMU torq 25,724 ft*lbMax torq 62,387 ft*lb Casing DetailsMax Ten 712,070 lb 9 5/8 53.50# L-80Set @ 9322

Special drift 8.5" 5" HWDP 50lb/ftMU torq 29,400 ft*lb 8 1/2 Openhole to 12,700Max torq 51,375 ft*lb 3° max devationMax Ten 691,195 lb

12 to 14' ROP to 11,940'6 1/2" O.D x 2 13/16 I.D. DC 45' ROP to 12,099'4 1/2 IF 12 to 14' ROP to TDMU torq 29,500 ft*lb Became stuck during Wt/ft 91lb connection

J-22 Insert Bit w/ gauge pro.Insert gauge pro. stabilizers6 1/2 Dailey Hyd Drlg Jars(not hitting)

Tally Book

Open Hole Fishing



Open Hole Fishing

Differential Sticking

Stuck Pipe

High pressureformation

High pressureformation

Low pressureformation

DrillingFluid

Formation

Drill Pipe



Stuck PipeDifferential Sticking

Solution•Pipe Freeing Agents•Back-off and Run Jars•Washover

Open Hole Fishing




Pipe Freeing Agents

Open Hole Fishing



Mechanical Sticking

• Inadequate Hole Cleaning• Sloughing and Swelling Formations• Keyseating• Undergauge Well Bore• Plastic Formations

Stuck Pipe

Open Hole Fishing



Inadequate Hole Cleaning

8” drill collars in 12 1/4” gauged openhole

Annular capacity 3.51 gal/ft

5” drill pipe in 12 1/4” openhole washed out to 15” I.D.

Annular capacity 8.16 gal/ft

Stuck Pipe

Open Hole Fishing



Stuck Pipe

Solution•Back-off and Run Jars•Washover

Inadequate Hole Cleaning

Open Hole Fishing



•Sloughing and Swelling Formations

Stuck Pipe


Open Hole Fishing



Key seating

Stuck Pipe

Open Hole Fishing



Stuck Pipe

Solution•Ream out Keyseat•Back-off and Run Jars•Washover

Keyseating

Open Hole Fishing



Under gauge Hole

Stuck Pipe


Open Hole Fishing



Plastic FormationsStuck Pipe

Swelling Plastic Formation

Solution•Back-off and Run Jars•Wash over

Open Hole Fishing



Fishing Assemblies

Engaging Device

Bumper Sub

Fishing Jars

Drill Collars

Accelerators

Open Hole Fishing



Engaging DevicesExternal, Internal and Screw-in Assemblies

Properties:• Strength• Releasable• Circulation• Wireline• Torque Capabilities• Jarring Up• Jarring Down

For the following tools we will rank the properties of each tool from 1 to 5, 5 being the highest

Open Hole Fishing



Engaging DevicesExternal

Bowen Series “150” Circulating and Releasing Overshot

4 Strength5 Releasable3 Circulation5 Wireline3 Torque Capabilities4 Jarring Up1 Jarring Down

Open Hole Fishing




Bowen Series “70” Short Catch Releasing Overshot


Open Hole Fishing




Box Tap or Die Collar


Open Hole Fishing



Engaging DevicesInternal

Bowen Itco Releasing Spear

5 Strength5 Releasable0 Circulation *2 Wireline3 Torque Capabilities4 Jarring Up1 Jarring Down

Open Hole Fishing



Engaging DevicesInternal

Taper Tap

3 Strength0 Releasable0 Circulation 0 Wireline3 Torque Capabilities2 Jarring Up1 Jarring Down

Open Hole Fishing



Screw-in AssembliesEngaging Devices

Cutlip Screw-in Sub


Open Hole Fishing



Engaging DevicesExternal, Internal and Screw-in Assemblies

Series 150 Overshot 25Series 70 Overshot 22Box tap 15Itco Spear 20Taper Tap 9Screw In sub 33

Open Hole Fishing



Engaging Devices

Overshot Extension

Accessories

Overshot Stop Rig

Open Hole Fishing



Engaging DevicesAccessories

Open Hole Fishing




High Pressure Pack-off

Open Hole Fishing




Oversize Guide

Open Hole Fishing




Wall hook Guide

Open Hole Fishing




Open Hole Fishing




Hollow Mill Insert and Container

Open Hole Fishing




Spear Pack-Off

Open Hole Fishing



Bumper Subs

Provides free travel for:• downward impact• controlled weight down

Open Hole Fishing



Fishing Jars

Provides time delay necessary to store energy in the accelerators and work string then releases allowing upward motion and impact

Open Hole Fishing



Drill Collars

Provides the mass which provides the force for the impact

Open Hole Fishing



Jar Accelerators

Provides the energy for the movement of the mass to create the impact

Further energy is supplied by the stretch in the work string.

Open Hole Fishing



•Stretch in work string creates tension energy

Work String

•Overpull creates increase in internal pressure in the pressure body of Accelerator creating tension energy

JarAccelerator

Drill Collars

•Time delay in fishing jars allows jar to remain partially cocked for several seconds

FishingJar

BumperSub

EngagingDevice

Fish

During overpull prior to jar opening:

Open Hole Fishing



During jar opening:

•Stretch in work string creates upward movement of drill collars

•Internal pressure in body of Accelerator creates upward movement of drill collars

•Jar opens. Stored tension energy in Accelerator and work string is released. Upward movement is stopped when the mandrel knocker comes in contact with the washpipe body.

Fish

EngagingDevice

BumperSub

FishingJar

Drill Collars

Work String

JarAccelerator

Open Hole Fishing



Washover OperationsWashovers operations are performed in open hole to:

• cut the formation or wall cake away from a fish

• mill junk away from the outside of a fish

• mill away parts of BHA that cannot be washed over

Open Hole Fishing




Washover

Open Hole Fishing



Washover OperationsOpen Hole Washover Shoe Design

Scallop Bottom for medium and hard formations

Scallop Bottom for burning over stabilizers

Tooth Type for soft formation

Crown Type offers greater strength for any design

Open Hole Fishing



Washover OperationsWashover Back-off Safety Joint

•Attaches Washpipe to work string

•Allows safety release from washpipe

•Makes back-off during washover trip possible

Open Hole Fishing



Junk Retrieval

Combination Ball Type Jet Junk Basket

Open Hole Fishing



Junk Retrieval

Reverse Circulating Junk Basket

Open Hole Fishing



Junk Retrieval

Globe Type Junk Basket

Open Hole Fishing



Junk Retrieval

Open Hole Fishing



Junk Retrieval

Junk Mill

Open Hole Fishing



Junk Retrieval

Boot type Junk Basket

Open Hole Fishing

wf_fishing open hole

Documents

open hole fishing

stuck pipedifferential sticking

engaging device fish

fishing jars

fishing jar

run jars

engaging devicesexternal

engaging devicesaccessories