Fishing operations including overshot and spears

fishing operations guide lines

1. ميحرلا نمحرلا للها مسب

2. Fishing
•What is there?
•Recovery
•Free Point and Back-off

3. Identifying the fish
•What is it?
•Where is it?
•What is looking up?
•How damaged is it?
Only when you know the answers to
these questions can you devise a
fishing attempt.

4. 4
FISHING OPERATIONS
1.In case of stuck pipe operations are failed to free stuck
objective.
2.Tools and equipment at surface fall down hole.
3.Down hole equipment was lost in hole (metal fatigue).
4.Lost drilling bits cones down hole.
5.Retrieving production packers or completion string.
Prepared by: Engineer Nasser
Hussein

5. 5
FISHING OPERATIONS
6.Completion string was parted or corroded.
7.Casing fall down hole.
8.Drill String Failure due to twist off or wash outs.
9.Wire line or SSSV control line was cut or left down hole.
Prepared by: Engineer Nasser
Hussein

6. 6
FISHING OPERATIONS
Successful fishing operations require:
1.Selection of suitable fishing tool which must be in
excellent condition.
2.An accurate measurements about dimensions of fish
down hole.
3.An excellent operator experience and back ground.
4.Available data about operations which led to have fish
down hole.
5.Condition of hole (either cased or open).
6.Good luck.
Prepared by: Engineer Nasser Hussein

7. Economics of Fishing
fishing uses the following equation:
D = V + Cs
R + Cd
where:
D = number of days to be allowed for fishing
V = replacement value of fish
Cs = estimated cost of sidetracking
R = daily cost of fishing tool rental and services
Cd = daily rig operating cost

8. Very Important:
•For every piece of equipment that goes in a well, you
should have:
–Diameter of every body, neck, shoulders, etc.
–Length of each section and the overall length.
–Thread type & if pin or box will look up.
–Break strength of all weak joints or thin tools.
–Drawing or photo of all unusual.
Prepared by: Engineer Nasser Hussein

9. 9
FISHING TOOLS
1.OVERSHOOT.
2.CASING SPEAR.
3.JUNK BASKET.
4.REVERSE CIRCULATION JUNK BASKET.
5.MAGNET.
6.SCREW IN SUB.
7.TAPER TAP.
8.BOX TAP.
9.PACKER PICKER.
10.WIRE LINE SPEAR.
Prepared by: Engineer Nasser Hussein

10. 10
OVERSHOOT SERIES
Prepared by: Engineer Nasser Hussein
Series 70 Short Catch O.S for pipes
Series 150 Regular pipes O.S
Series10 Regular Sucker rod O.S
Series 20 Short Catch O.S for Sucker rod

11. 11
TYPES OF OVERSHOOTS
Has 3 types:
1.Regular overshoot
2.Short catch overshot
3.T dog overshoot
Overshoots are tools which catch rounder fish from
its outside diameter.
Prepared by: Engineer Nasser Hussein

12. 12
COMPONENTS OF OVERSHOOT
Main components of overshot are:
1.Lip guide
2.Bowel
3.Basket or Spiral grapple
4.Mill control
5.Stop ring (Short catch overshoot)
6.Back off element
Prepared by: Engineer Nasser Hussein

13. 13
BOWEN OVERSHOOT STRENGTH DATA
Prepared by: Engineer Nasser Hussein
BOWEN OVERSHOT STRENGTH DATA
Max catch
size w/ Spiral Basket Grapple
spiral O.D. Grapple w/o stop w/ stop
grapple (in) (lbs) (lbs) (lbs)
8" 9 5/8" 602,700 510,750 422,000
6 3/4" 8 3/4" 637,000 542,250 408,250
7 1/4" 8 7/8" 586,900 515,600 426,500
7 3/4" 9 3/8" 592,000 520,000 340,000
6 1/4" 7 5/8" 486,900 431,100 348,000
3 1/8" 3 7/8" 154,100 138,800 77,100
6 1/4" 7 7/8" 586,800 515,600 413,700
6 1/2" 8 1/8" 586,500 515,500 413,500
3 1/2" 4 3/8" 276,400 220,700 144,300
3 1/16" 3 15/16" 265,400 219,000 160,100
3 1/8" 4" 262,900 217,000 125,100
3 21/32" 4 9/16" 276,400 228,100 157,900
4 1/4" 5 1/8" 356,800 301,000 232,200
4 3/4" 5 5/8" SH 360,400 308,400 234,500
5" 5 7/8"SH 323,500 238,500 218,500
6 3/4" 7 7/8" 396,000 347,500 279,000
8" 9 1/8" 396,000 347,500 236,000
8 7/8" 10 1/2" 586,600 515,400 413,600
9" 10 5/8" 586,800 515,600 426,500
10 1/8" 11 3/4" 616,000 528,000 435,000

14. 14
OVERSHOOTS
Fishing through washout holes
Prepared by: Engineer Nasser Hussein

15. Top Sub
Piston Spring
Piston Spring Seat
Release Piston
Release Piston Bolt
Main Piston
Basket Grapple
Basket Grapple Control
Bowl
Guide
HYDRAULIC RELEASE OVERSHOTS
Operation
The Logan Hydraulic Release
Overshot requires only set down
load or movement to engage the
fish.
If the fish can not be retrieved and
release is necessary, simply relax
any tension that might have been
applied to the string during the
retrieval operation. Increased flow
rate through the tool will cause the
fish to be released.
No drop ball is necessary for the
tool to work.

16. Type B
Die
Collar
with
Lipped
Guide
Type A Die
Collar
Oversize
Guide
Bowen Rotary Die Collars
Die Collars are simple, rugged,
dependable external catch fishing
tools.
Operation
Run the Die Collar in the hole to the top of
the stuck fish. Apply less than one point
of weight and rotate the die collar until the
tapered threads have engaged the fish.
Stop rotation and pull the fish from the
hole.
Type “A” Die Collars have a smooth end
on the large diameter end, the guide is
integral with the die collar.
Type “B” Die Collars have a threaded end
on the large wicker diameter end so that
an optional guide can be used to better
adapt the die collar to changing hole
conditions.

17. 17
CASING & Tubing SPEAR
Casing or Tubing spears are tools which catch rounder
fish from its inside diameter.
Main components of spears are:
1.Guide nose or ball nose
2.Friction block
3.Slips internal dogs
4.Slips
5.Locking system
6.Spear body
7.Stop ring
8.Back off element
9.Adjustable centralizer
Prepared by: Engineer Nasser Hussein

18. To Engage the Fish:
When the Spear has reached the point of desired engagement with the
fish, rotate sufficiently to move the Mandrel one full turn to the left. This
turns the Mandrel down through the Grapple, placing the Grapple into the
engaging position. A straight pull will then wedge the Grapple into positive
engagement with the fish.
To Release:
Bump down to break the freeze, then rotate two or three turns to the right.
This moves the Mandrel up through the Grapple, forcing the Grapple
against the Release Ring and putting the Spear in released position. A
straight upward pull will then generally free the Spear;
CASING & Tubing SPEAR
The Stop Sub is designed to be used with the Spear when use of a stop is
required. It is installed in the box connection at the top of the Mandrel.

19. 19
JUNK BASKET
Junk Basket is a device which planned to be used for cleaning bottom of
hole from all small junk resulting from any milling operation or loosing of
drilling bits teeth or inserts.
Main components of J.Basket are:
1.Body
2.Basket beveled from top edge
Junk Basket working as follow:
1.Stop pumping and wait for 5 minutes
2.Get drilling bit close to bottom of hole
3.Start pumping with high rate for 5 minutes
4.Stop pumping and wait for 10 Minutes.
5.Repeat above steps for 5 times (depending on amount of junk)
6.POOH and off load basket from junk
The theory of that is with pumping , junk take velocity to move up, when Stopping,
junk start falling down with gravity in different direction & slower velocity where
some junk goes inside basket.
Prepared by: Engineer Nasser Hussein

20. 20
REVERSE CIRCULATION JUNK BASKET
Reverse circulating junk basket is a tool which is used
to catch drilling bit cones or junk or tools similar in bit
cones size.
Main components of Reverse
Circ.J.Basket are:
1.Core head (Mill shoe)
2.Catcher sub
3.Core barrel
4.Ball seat
5.Ball
6.Top sub.
7.Circulating holes
Prepared by: Engineer Nasser Hussein

21. 21
MAGNET
Magnets are tools which can be used to clean bottom of hole from iron junk.
Main components of magnets are:
1.Face plate
2.Barrel
3.Strong Magnet
4.Top Sub
Prepared by: Engineer Nasser Hussein
Fishing Magnets are used to retrieve all types of
small objects having magnetic attraction from bore
hole bottoms.
Such un-drillable objects as bit cones, bearings,
slips, tong pins, and milling cuttings can often be
retrieved only by magnetic attraction.

22. 22
SCREW IN SUB
Screw in sub is a cross over with pin on its bottom
had threads similar to top of fish threads.
This sub can be used if top of fish is box looking up or
after back off for drilling or completion string.
To run with Screw in sub, the recovered part of string
at surface must ended with complete PIN in good
condition.
Prepared by: Engineer Nasser Hussein

23. 23
TAPER TAP
If top of fish is not Box or Pin looking up or damaged
irregular rounded tubing body or Pin is partially
broken inside fish, taper tab can be used in fishing
job.
Taper tap is a sub with threaded long PIN with range
of thread OD diameter (start with smaller OD than top
of fish ID).
Taper Tap can screw into top of fish and create new
threads in fish top.
Taper tap fishing internally.
Prepared by: Engineer Nasser Hussein
Skirt Type
Taper Taps
Run the taper tap in the hole to the top of the stuck fish,
Apply less than one point of weight, rotate the tap until the
tapered threads have engaged the fish. Stop rotation and
pull the fish from the hole.

24. 24
BOX TAP
If top of fish is partially broken Pin looking up and
overshoot or spear can not catch fish, Box tab can
be used in fishing job.
Box tap is a sub with threaded long Box with range
of threads ID diameter (start with bigger ID than top
of fish OD).
Box Tap can screw into top of fish and create new
threads in fish top.
Box tap fishing externally.
Prepared by: Engineer Nasser Hussein

25. 25
PACKER PICKER
Packer picker is a combination tool for milling &
retrieving permanent Completion Packers.
Main components of Packer Picker are:
1.Retrieving spear guide or Junk mill
2.Packer retrieving Spear.
3.Extension Bar.
4.Wash over mill
5.Wash pipe Extension
6.Top Sub.
Prepared by: Engineer Nasser Hussein

26. Downhole Bowen Simplex Packer Retrievers are internal engaging fishing tools designed to retrieve
all types of “drillable” production packers in a single run.
They are used in an assembly which consists of a retriever, stinger, mill shoe and bushing.
A Bowen Simplex Packer Retriever has a top sub, mandrel, cage and bottom nut.
The retriever is attached to the stinger which is long enough to extend through the packer, when the
milling operation is started.
The mill shoe must be of a length which will shroud the packer.
A short mill shoe may be used with a piece of washpipe in place of the long mill shoe.
Mill shoes are faced on the bottom and I.D. with Bowen Itcoloy (sintered tungsten carbide). They will
not damage the well casing.
On the bottom of the bushing there is a box connection for attaching the stinger and a pin connection
for attaching the washpipe or long mill shoe. On top is a box string connection.
To operate, lower the assembly until the Bowen Simplex Packer Retriever passes through the bore of
the packer.
Continue lowering until the mill shoe contacts the packer’s slips. Begin circulation and rotation, and
mill away the slips and sealing element until the packer is free.
Then cease rotation, elevate the string and the retriever will engage and retrieve the packer. At any
time after the retriever enters the packer, it can be released by lowering a few inches, rotating 90° to
the right and slowly elevating the string.

27. 27
WIRE LINE SPEAR
W.L spear is a tool for fishing dropped wires
or
SSSV control line down hole.
Prepared by: Engineer Nasser Hussein

28. Fishing Fingers

29. Pre-Run Post-Run
Cable Catcher Sub

30. Swabbing Tool
Applications
This tool is designed to run for creating under balance
condition inside D.P compared to annulus.
Advantages
Designed to allow draw-down to be created across the
bottom of hole in order to remove junk above fish.
Theory:
RIH with semi-full D.P, Once get bottom, Slack weight,
internal Valve will be opened and fast U tube effect from
annulus to D.P side bushing junk inside D.P.
Note:
While U tube is running, keep pumping down annulus to
avoid well flowing.