1. PETE 406PETE 406
Fishing OperationsFishing Operations

2. OutlineOutline
• Cardinal RulesCardinal Rules
• Pipe StickingPipe Sticking
• Determining the StuckDetermining the Stuck
PointPoint
• Parting the PipeParting the Pipe
StringString
• Catch ToolsCatch Tools
• JarringJarring
• Wash-overWash-over
• Loose-JunkLoose-Junk
• Mills and RotaryMills and Rotary
ShoesShoes
• Wireline FishingWireline Fishing
• Stuck PackersStuck Packers
• Fishing in CavitiesFishing in Cavities

3. Cardinal RulesCardinal Rules
• Evaluate the situationEvaluate the situation
• CommunicateCommunicate
– Collect complete informationCollect complete information
– Notify the fishing tool companyNotify the fishing tool company
– All parties understand the situationAll parties understand the situation
– Keep all parties informedKeep all parties informed

4. Cardinal RulesCardinal Rules
• Gather informationGather information
– OD, ID, length of fishing stringOD, ID, length of fishing string
– Know limitations of fishing stringKnow limitations of fishing string
– Accurate weight indicatorAccurate weight indicator
– Locate the top of the fishLocate the top of the fish
– Determine freepointDetermine freepoint
– Leave one to two joints above freepointLeave one to two joints above freepoint

5. Cardinal RulesCardinal Rules
• Keep track of pipe talliesKeep track of pipe tallies
• Do not rotate fishing stringDo not rotate fishing string
• Do not pull out of the rope socketDo not pull out of the rope socket

6. Pipe StickingPipe Sticking
• Sand StickingSand Sticking
• Mud StickingMud Sticking

7. Pipe StickingPipe Sticking
• Mechanical StickingMechanical Sticking
– Stuck packersStuck packers
– Multiple strings wrap aroundMultiple strings wrap around
– Crooked pipeCrooked pipe
– Junk in the holeJunk in the hole

8. Mechanical StickingMechanical Sticking

9. Pipe StickingPipe Sticking
• KeyseatKeyseat

10. Pipe StickingPipe Sticking
• Cement StickingCement Sticking

11. Pipe StickingPipe Sticking
• UndergaugeUndergauge
HoleHole

12. Pipe StickingPipe Sticking
• DifferentialDifferential
StickingSticking

13. Blowout StickingBlowout Sticking

14. Lost Circulation StickingLost Circulation Sticking

15. Sloughing-Hole StickingSloughing-Hole Sticking

16. Determining the Stuck PointDetermining the Stuck Point
∀∆∆L= Pipe Stretch,inL= Pipe Stretch,in
• L = Length of free pipe, ftL = Length of free pipe, ft
• E = Modulus of ElasticityE = Modulus of Elasticity
• a = cross section of pipea = cross section of pipe
• SC = Stretch constantSC = Stretch constant
• FPC = Free pointFPC = Free point
constantconstantF
FPCL
L
SCLFL
aE
LF
L
s
×Λ
=
××=∆
×
××
=∆
12

17. Determining the Stuck PointDetermining the Stuck Point
• SC = 0.4/aSC = 0.4/ass
• FPC = 2500 X aFPC = 2500 X ass
• There are stretch tables and stretchThere are stretch tables and stretch
graphs availablegraphs available

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

19. Parting the Pipe StringParting the Pipe String
• BackoffBackoff
• Chemical CutChemical Cut
• Jet CutJet Cut
• Mechanical CutMechanical Cut

20. BackoffBackoff
• Blind backoffBlind backoff
• Backoff toolBackoff tool
– InsideInside
– outsideoutside

21. Chemical CutChemical Cut

22. Jet CutJet Cut

23. Mechanical CutMechanical Cut

24. Catch ToolsCatch Tools
• OvershotOvershot
• Basket GrappleBasket Grapple
• Spiral GrappleSpiral Grapple

25. Catch ToolsCatch Tools
• SpearSpear

26. Jarring AssemblyJarring Assembly

27. Wash-overWash-over

28. Loose-JunkLoose-Junk

29. Mills and Rotary ShoesMills and Rotary Shoes