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PETE 406

Outline. Cardinal RulesPipe StickingDetermining the Stuck PointParting the Pipe StringCatch ToolsJarringWash-over. Loose-JunkMills and Rotary ShoesWireline FishingStuck PackersFishing in Cavities. Cardinal Rules. Evaluate the situationCommunicateCollect complete informationNotify the f

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PETE 406

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    1. PETE 406 Fishing Operations

    2. Outline Cardinal Rules Pipe Sticking Determining the Stuck Point Parting the Pipe String Catch Tools Jarring Wash-over Loose-Junk Mills and Rotary Shoes Wireline Fishing Stuck Packers Fishing in Cavities

    3. Cardinal Rules Evaluate the situation Communicate Collect complete information Notify the fishing tool company All parties understand the situation Keep all parties informed

    4. Cardinal Rules Gather information OD, ID, length of fishing string Know limitations of fishing string Accurate weight indicator Locate the top of the fish Determine freepoint Leave one to two joints above freepoint

    5. Cardinal Rules Keep track of pipe tallies Do not rotate fishing string Do not pull out of the rope socket

    6. Pipe Sticking Sand Sticking Mud Sticking

    7. Pipe Sticking Mechanical Sticking Stuck packers Multiple strings wrap around Crooked pipe Junk in the hole

    8. Mechanical Sticking

    9. Pipe Sticking Keyseat

    10. Pipe Sticking Cement Sticking

    11. Pipe Sticking Undergauge Hole

    12. Pipe Sticking Differential Sticking

    13. Blowout Sticking

    14. Lost Circulation Sticking

    15. Sloughing-Hole Sticking

    16. Determining the Stuck Point DL= Pipe Stretch,in L = Length of free pipe, ft E = Modulus of Elasticity a = cross section of pipe SC = Stretch constant FPC = Free point constant

    17. Determining the Stuck Point SC = 0.4/as FPC = 2500 X as There are stretch tables and stretch graphs available

    18. Determining the Stuck Point The best way though is with a Freepoint tool. This is a wireline tool that is run inside the stuck pipe. Periodically (based on calculations) the pipe is stretched and rotated. The freepoint tool detects movement in the pipe. If there is no movement, the pipe is stuck. The deepest point where the freepoint tool detects movement is the freepoint

    19. Parting the Pipe String Backoff Chemical Cut Jet Cut Mechanical Cut

    20. Backoff Blind backoff Backoff tool Inside outside

    21. Chemical Cut

    22. Jet Cut

    23. Mechanical Cut

    24. Catch Tools Overshot Basket Grapple Spiral Grapple

    25. Catch Tools Spear

    26. Jarring Assembly

    27. Wash-over

    28. Loose-Junk

    29. Mills and Rotary Shoes

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