Fishing Operations (Best Practices)

CUT & THREAD FISHING PROCEDURES AND BEST PRACTICES Version 2005Jan15

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A CUT & THREAD FISHING OPERATION is the most dangerous operation involving wireline. Prior to starting a cut & thread operation ensure the following is completed: A written HARC is completed and discussed with all involved This “CUT & THREAD” procedure is reviewed with all involved The operation involves several companies, including the operating company, the rig company, the fishing hand and Schlumberger. It is an integrated effort with one supervisor, the Operator Wellsite Supervisor. Communication is critical for a safe & successful fishing job EVERYONE INVOLVED IS EMPOWERED TO STOP THE OPERATION IF THEY FEEL IT IS UNSAFE!!

1 Hang Sheave In Derrick Try to hang sheave with fishing sling so it will not interfere with the handling of drillpipe Lower sheave must be moved away from rotary to prevent interference with rig floor operations and cable contact with top drive Clear the rig floor while derrick man hangs the sheave.

Use Longest Links Available

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In order to determine the proper fishing assembly to use, the derrick man should provide a best estimate of the distance available between the top of pipe and the sheave.

Top Drive

108” ones are standard; try to use 140” ones or longer Top Drive

Inspect every 5,000’ and before going into open hole for cable wear, damage of fishing equipment, and tightness of fishing equipment If available, install roller assembly on top drive to eliminate cable rubbing; If one is not available, have rig make one

108” >108”

Do not use the Varco Wireline Adapter commonly known as “Bicycle Wheels” Not Desirable

Desirable

Tension Device Switch to TDK if using CMTD ( if available) (Prevents cable backlash)

CMTD Schlumberger

Compare TDK and CMTD readings so that fishing operation is performed under correct tension Do not pre-load lower sheave with air hoist tension; Sheave should hang freely until weight is applied

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TDK

the Cable 2 Cut Pull 1,000 to 2,000 lbs over normal tension and secure T-Bar cable clamp to cable If hole is straight, cut cable 5 to 7 feet above rotary table

Cable

If hole is deviated, cut cable 10 feet above rotary table plus 1 foot for every 1,000 feet greater than 10,000 feet T-Bar

T-Bar

Test T-Bar for slippage before cutting cable Tapered Cone

Use tapered cones from LEH-Q on top of fishing weights If available, use heavier-shorter fishing weights with knuckle joints and swivel, or Wire Rope Weight with Cooper Knuckle-Swivel (a must on top drives!!) Minimum restrictions for all drilling hardware (jars, drill collars, and heavy weight) must be known to determine size of overshot guide to use Always use the largest guide that will fit through drilling hardware

Highly Recommended

Rig Up Spearhead Overshot O r

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Use proper size cable bushing in T-Bar and mark cable to ensure there is no slippage

Or

Knuckle Joints

Cooper Knuckle -Swivel

Never use “after-market” non-SLB rope sockets. Swivel used to prevent cable torque from backing off spear assembly.

Overshot Guide

Rig Up Spear Never use spears which contain “W’s” in their work order numbers Always use Hexagon Adapter when stripping over; Hexagon Adapter will stop on top of no-go if dropped accidentally Only use plain adapter when drill pipe ID is too small for Hexagon Adapter and switch back to Hexagon Adapter as soon as drill pipe ID permits Never use “after-market” non- SLB rope sockets

Work Order Number Stamped Here

Hexagon Adapter

If basket type grapple is used, assemble 5-3/4” overshot, basket grapple, and no-go

Bowl to Top Sub 5 3/4” 7600

4 11/16” 3200

4 11/16”

Assemble 4-11/16” overshot, spiral type grapple, and no-go (preferred method)

Make-Up Torque

5 3/4”

3 Assemble Overshot

Not Desirable

Desirable

Bowl to Guide 5 3/4” 4 11/16” 1700 1300

ALWAYS VISUALLY INSPECT grapple for proper size for job and NEVER install a used grapple

Remove hex adapter, pass well end of cable through downhole overshot and reinstall hex adapter (Remember, 2 1/4” hex adapter will not pass through the smaller ID no-go)

Install Drain Sub Drain sub with blow out disk aids in grapple cleaning and prevents pulling wet drillpipe after disk is blown Install above downhole overshot assembly

Blow Out Disk

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Thread Cable Thru Overshot

4 Thread Through Slowly (