Fishing tool catchers pipes bells taps milling cutters. Fishing tool. Questions for self-control

The main works in the elimination of accidents in wells are fishing, milling and auxiliary (preparatory). In accordance with this, tools and devices are divided into gripping, cutting and auxiliary.

Catchers are made with a left-hand thread and are used with a centering device (funnel).

The catchers are lowered into the well on the string of left drill pipes.

ShK type rod heads (Fig. 5.60.) are designed to extract the pump rod string and wellhead rods remaining in the well.

Clamps are available in two versions:

Execution 1 - for gripping the body, coupling or head of the pump rod (Fig. 5.60. i);

Execution 2 - for gripping the coupling or the head of the pump rod (Fig. 5.60. b).

The rod heads are made with a right-hand thread and are used with a centering device (funnel).

The rod head consists of sub 1, lower b and upper 2 bodies, interconnected by threads, lower 7 and upper 3 springs, guide screw 8, collet 9, fork 4, dies 5 and funnel 10. On the inner conical surface of the upper body there is a fork with dies for catching rods by the body. The dies moving inside the body on the feathers of the fork are held in the lowest position with the help of the upper spring. In the wall of the lower case there are three through grooves 12 for the exit of the collet feathers and a bayonet groove 11 for moving the guide screw.

The collet inserted into the lower body is designed to grip the rods by the sleeve or head. The lower conical part of the collet forms three feathers located along the circumference at the same distance from each other. On the inside of the collet feathers there are protrusions for gripping the rod by the head or sleeve.

Rice. 5.60. ShK type barbells: a - execution 1; b - execution 2; 1 - sub; 2 - upper body; 3 - upper spring; 4 - fork; 5 - dies; 6 - lower body; 7-lower spring; 8 - guide screw; 9 - collet; 10- funnel; 11 - bayonet groove; 12 - through groove

The lead screw connected to the collet moves in a through bayonet slot. When the head of the guide screw is at the highest point of the bayonet slot, the collet rotates around its axis by 60°, and the lower ends of the feathers are located against the internal projections of the body. In this case, the downward movement of the catcher is stopped.

When lifting the catcher, the collet picks up the rod under the coupling or head and, without rotating, moves down until it stops against the collar of the lower body. In this case, the head of the guide screw from the highest point moves to the vertical section of the bayonet groove and keeps the collet from rotating. The rod heads are lowered into the lift tubing on the sucker rod string.

The combined catcher LKSh-114 is used for catching, unscrewing and extracting from the production string in whole or in parts of pump rods by the body or sleeve, as well as undeformed tubing with a diameter of up to 48 mm.

The catcher (Fig. 5.61.) consists of a body 4, an extension 1, ram holders 3 and 6, a spring 2, rams 5 and 8, a screw 7 and a locking screw 9.

Rice. 5.61. Catcher LKSh-114 1 - extension; 2 - spring; 3, b - die holders; 4 - body; 5.8 - dies; 7 - screw; 9 - locking screw; 10 funnel

An extension cord is attached to the upper part of the body of the catcher, and a funnel 10 is attached to the lower part of the body. In the upper and lower parts of the body, on the inner surface, there are special grooves with a dovetail section profile, in which there are dies for catching rods by the body on top, and bottom - dies for catching rods by the clutch. The dies move in the body synchronously with the help of special ram holders, interconnected by screws, and a spring.

The combined catcher LKShT-136 is used for catching and extracting tubing and sucker rods.

The catcher (Fig. 5.62.) consists of three gripping tiers: the lower one is for gripping tubing with a diameter

73 mm and a bundle of sucker rods; medium - for gripping tubing with a diameter of 48 and 60 mm and sucker rods by the coupling; upper - to capture the pumping rods by the body.

Each tier includes housings: upper 5, middle 6 and lower 12, interconnected by a thread, and the middle and lower - using sub 10.

In the upper case there are two folding scarves 2 with a comb notch, which are fixed in the grooves of the bracket 4 on the axis 3. The dies can be rotated to the upper (opened) position and return to their original position. A sub 1 is attached to the upper body for connection with the drill string, and a special funnel 15 is attached to the lower body for directing the rods and pipes to be caught inside the catcher.

Rice. 5.62. Lovitel LKShT-136: 1 - sub; 2 - folding dies; 3 - axis; 4 - bracket; 5, 6, 12-cases; 7,13-glasses; 8, 11 - springs; 9,14-dice; 10 sub; 15- special funnel

In the middle and lower housings on the inner surface there are inclined grooves with a cross-sectional profile of the "dovetail" type, shifted relative to each other by 120°. Three dies 9 and 14 are located in the grooves. In the gripping part of the dies there are sharp comb grooves, and on the outside there are conical protrusions with a dovetail section profile, which enter the corresponding grooves of the housings. Cups 7 and 13 are installed on top of the ends of the dies, serving as directions for springs 8 and //.

Spears are designed to be retrieved entirely by walking or in parts by unscrewing the tubing or casing remaining in the well as a result of an accident.

According to the nature of the capture and the principle of operation, the pipe spears are divided into internal non-releasing TV, internal releasing TVM, external non-releasing TNZ and external releasing HNO. Inner spears of the non-releasing type have only a gripping mechanism. The releasing type pipe spears consist of mechanisms for capturing and fixing the rams in the released position.

All spears are manufactured with right and left hand threads. Pipe spears with right-hand threads are used when extracting a string of captured pipes as a whole, and with left-hand threads - for unscrewing and extracting pipes in parts.

Pipe spears internal non-releasing TV (Fig. 5.63.), Designed in six sizes, are a checker-type fishing tool and consist of a gripping mechanism, which is manufactured in two versions: single-dart - for pipes with diameters of 48 ... 60 mm and six-dart - for pipes with diameters of 73 ... 114 mm (Fig. 5.63. a, b).

A pipe spear with a six-blade mechanism (Fig. 5.63. b) consists of a rod with six inclined planes arranged in two tiers and offset by 60 ° relative to each other. In the middle part of each plane, there are longitudinal protrusions with a cross-sectional profile of the "dovetail" type. On these protrusions in the vertical direction, together with the die holder, the dies 3 move, having a notch on the outer surface. The movement of the dies is limited in the upper position by an emphasis on the shoulder of the rod, and in the lower position - by an emphasis on the end of the tip b.

In a single ram spear, the function of the opposite ram is performed by a comb notch on the spear rod, and the role of the ram holder is a leash screwed into the upper end of the ram and holding the ram after release.

In a well with a small gap between the production string and the fishing string, pipe spears without centering devices are used. With a significant gap, the pipe spears are equipped with a special sub and a centering device (directions with a cutout or with a funnel) (Fig. 5.63. c, d). The design of the spear makes it possible to get rid of trapped pipes at the wellhead.

Rice. 5.63. Pipe spears internal non-releasing TV:

a, b - assembled pipe spears without a centering device; c - pipe spear assembly with a centering device (direction with a cutout); g - pipe spear assembly with a centering device (direction with a funnel); 1 - sub; 2 - rod; 3 - die; 4 - wedge; 5 - die holder; 6- tip; 7- special sub; 8 - direction with cutout; 9 - direction; 10 funnel

Internal releasing pipe spears TVM are developed in nine standard sizes in two versions: TVM-1 - pipe spears resting against the end of the captured pipe string, and TVM-2 - pipe spears that are inserted into the captured pipe string to any depth.

Pipe spears TVM-1 consist of a mechanism for capturing and fixing the rams in the released position. The gripping mechanism, located in the lower part of the spear, is manufactured in two versions - single and six rams.

The six-piece mechanism (Fig. 5.64. a) of the capture consists of a rod having six inclined planes arranged in two tiers and displaced relative to each other by 60 °.

Rice. 5.64. Internal releasing pipe spears TVM-1 (a) and TVM-2 (b): a: 1 - sub; 2 - body; 3 - latch; 4 - rod; 5 - nipple; 6- brake shoe; 7 - die holder; 8 - dies; 9 - tip; 10- leash; b: 1 ~ rod; 2 - dies; 3 - lower rod; 4 - latch; 5 - spring holder; 6 - flat springs; 7 screws; 8 rings; 9-tip

In the middle part of each plane there are longitudinal protrusions with a dovetail section profile, along which the dies 8 move synchronously in the vertical direction with the help of the 7 die holder. tip 9.

Rice. 5.65. Universal (a) and special (b) taps: 1 - connecting thread, 2 - fishing thread

The MEU and MES taps are a mortise non-releasing type fishing tool and are designed to extract the pipe string remaining in the well, ending at the top with a sleeve or a upset part of the pipe.

Capturing occurs by screwing into the inner surface of the body of the emergency pipe or coupling, while universal MEU taps are screwed into the pipe body, special taps - by screwing into the thread of the coupling (Fig. 5.65.).

The body of the tap is made in the form of a truncated cone, the upper end of which has an internal locking thread for screwing with the fishing string, and the lower end has a fishing thread. Along the entire body of the tap, grooves are provided for the exit of chips when cutting into an emergency object. To improve the cutting conditions, the front faces of the longitudinal grooves of the tap on the cutting part are made at an angle of 3° to its axis. The tap thread is carburized, followed by quenching and tempering.

Taps are manufactured with right and left threads. Bells KS and K are mortise-type fishing tools. Designed for capturing and extracting the pipe string remaining in the well. Capture occurs by screwing into their outer surface. By purpose, the bells are divided into through type KS and non-through type K (Fig. 5.66.).

The peculiarity of through bells, in contrast to non-through bells, is that they provide the ability to pass a broken or sleeveless end of a catch pipe through the bell body, followed by its capture by threading on the outer surface of the lock or coupling. Bells of both types are made with a funnel thread. The thread in the upper part of the bell serves to connect it to the pipe string, the thread in the lower part is a fishing thread, of a special profile, with a taper of 1: 16. Along its entire length, longitudinal grooves are made for the exit of chips when cutting into a fished object. To improve the cutting conditions, the front faces of the longitudinal grooves on the cutting part of the bell are made at an angle of 3° to its axis.

Rice. 5.66. Non-through (a) and through (b) pressure bells:

1 - thread connecting to the clone; 2 - fishing thread; 3 - thread connecting to the funnel

Bells are made right - with right-hand fishing and connecting threads and grooves and left - with left-hand connecting threads and grooves. The right bell is used to extract the whole column of the right pipes and the left ones in parts (by unscrewing), the left bell is used to extract the column of the left pipes in whole and the right pipes in parts. With small gaps between a cased or open well and a string of fishing pipes, the bells are used without funnels, in wells with a significant gap - with funnels.

Milling cutters. The cutting-abrasive annular mill FK is designed for milling stuck drill and tubing pipes (along the body), as well as sucker rods in cased wells.

Anti-jamming channels are evenly located on the outer surface of the cylindrical body of the router. The lower end of the body is reinforced with composite carbide material (Fig. 5.67.).

The milling cutter is connected to the drill string by means of a receiving pipe made from the corresponding drill pipe so that its inner diameter is not less than the inner diameter of the milling cutter.

Downhole milling machines of types FZ and FZS (Fig. 5.68.) are designed for milling metal objects in cased and open holes in order to clean wells throughout the entire borehole section.

Rice. 5.67. FK type milling cutter

Rice. 5.68. Milling cutters of types FZ (a) and FZS (6)

The upper end of the cylindrical body of the milling cutter has a thread for screwing with the drill string, and the lower end is reinforced with a composite carbide material. In the reinforced layer, flushing channels are provided, having a spiral insert, through which the flushing-cooling liquid enters directly into the cutting zone.

The magnetic milling cutter FM is designed for milling and extracting small metal objects with ferromagnetic properties located at the bottom of the well.

The cutter-catcher (Fig. 5.69.) consists of a sub, a housing and a magnetic system.

The lower part of the case is made in the form of a milling crown. The magnetic system is a set of permanent magnets, which are placed in a metal cup that serves as a magnetic circuit. The locking thread on the upper end of the sub provides connection of the cutter-catcher to the drill pipe string. The flushing liquid flow is directed along the periphery of the magnetic system.

Milling reamer well FRL is designed to cut a "window" in the casing string for subsequent drilling of the second wellbore. The milling reamer consists of cutting and fishing parts. The cutting part includes a cylindrical and conical reamer and an annular mill. The fishing part is a special grip installed inside a cylindrical reamer (Fig. 5.70.).

In the upper part of the milling reamer, a key thread is cut for attaching to the drill pipe string. The flush hole is central.

"Windows" of the required profile and length in the casing string are cut in one run with simultaneous extraction to the surface of a part of the casing string - the "band" formed in the process of cutting the "window".

Rice. 5.69. Magnetic milling cutter type FM: 1 - sub; 2 - body; 3 - magnetic system

Rice. 5.70. Downhole milling reamer type FRL

The universal seal is designed to determine the position and type of the upper end of the object left in the well due to an accident, as well as the state of the production string, using the imprint obtained on the aluminum shell. The main printing units (Fig. 5.71.) include a body with "details for obtaining an imprint of an object and a clamping device.

A rubber cup is attached to the thickened lower part of the case with four screws. Aluminum is put on the glass

a shell, the "feathers" of which are bent onto the annular shoulder of the body. A guide screw is installed on the middle cylindrical part of the body and a trapezoidal thread is cut. A clamping device moves along the screw and thread, with the help of which the "feathers" of the aluminum shell are clamped. The clamping device consists of a pressure sleeve and a nut.

A sub with a locking thread is screwed onto the upper part of the body for attaching to the drill pipe string, on which the seal is lowered into the well. If necessary, the descent is carried out with flushing.

The seal is installed in the well at the upper end of the object, while the load on it should not exceed 20 kN.

Rice. 5.71. Universal seal type PU2:

1 - sub; 2 - body; 3 - pressure nut: 4.7 - guide screws; 5 - pressure sleeve; 6- aluminum shell; 8 - rubber cup

Fishing rods are a tool for catching and extracting pump rods, tether lines, logging cables, bailers and small items from wells.

Non-articulated fishing rods UOY68, UK1-168, UOOSH-168 and UOSh-168 are designed for catching and extracting from wells tar-tal ropes with a diameter of 19 mm or less, as well as logging cables with a diameter of not more than 22 mm.

Fishing rods (Fig. 5.72.) Are rods 3 of circular cross section with welded hooks 4 of a special shape.

At the upper end of the rod, a left-hand thread is cut for screwing in a transfer sleeve 1, which has a threaded lock of 89 mm drill pipes for screwing in a fishing rod. A funnel 2 is screwed onto the lower end of the transfer sleeve, which serves as a direction and at the same time a limiter for the entry of the rod into a ball of tangled rope or cable.

Rice. 5.72. Fishing rods:

a-rod-hook UK1-168; b-rod UO1-168; e-rod UOOP1-168; g-rod UOP1-168; d-articulated rod USh1-168

Each of these fishing rods has its own distinctive features associated with the specifics of fishing conditions. The one-horned fishing rod U 01-168 is equipped with four hooks located on a single rod from its different sides and at different heights. The one-horned fishing rod UOSh-168 is equipped with two hooks located diametrically opposite. Inside the rod there is a through hole for the passage of the flushing liquid. The one-horned one-sided fishing rod UOOSH-168 is equipped with two hooks located on one side of the rod at different heights. This rod has a through hole in the rod to circulate the washing liquid.

The articulated fishing rod USh1-168 (Fig. 5.72. e) is a solid forged rod 3 of circular cross section, on the upper thickened end of which a thread is cut for screwing into sub 1. At the upper end of this sub, a locking thread of drill pipes is cut to attach the fishing rod to the drill string , and a funnel 2 is screwed onto its lower end. Slots are made in the body of the rod at different distances from each other, into which hinged hooks 7 are inserted, connected to the rod with the help of fingers 6. A leaf spring 5 is fixed above each hook, which serves to throw the hooks into extreme down position.

Hooks 7, turning on fingers b, enter inside the slots, thereby facilitating the insertion of the rod into a tangle of tangled emergency rope or cable.

Other types of fishing tools - a fishing spider, a “crumpled” pipe, a fishing hook, a corkscrew-ripper - are designed to capture and lift objects that have fallen on the bottom, to extract the ESP cable from the well, as well as to loosen and lift oil seals.

Questions for self-control:

1. Where are the power guys attached to the mobile mast?

2. The procedure for mounting a telescopic wing.

3. What is a tackle system?

4. Appointment of covers of the crown block and traveling block.

5. Lubrication of rope pulley bearings.

6. Similarities and differences between cast and forged hooks.

7. Appointment of the hook spring.

8. Appointment and types of ropes.

9. Similarities and differences between beam and rod elevators.

10. What is the versatility of the ETA elevator?

11. How are EHL and ETA elevators closed?

12. In what cases is the operation of the elevator not allowed?

13. How can one rod elevator handle all rod sizes?

14. Similarities and differences between the keys of CTN and CTND.

15. Advantages of the KLTU key in comparison with the KTG.

16. Assignment of KSM keys.

17. How many standard sizes of rod wrenches are in one set?

18. What determines the carrying capacity of a spider?

19. What are the advantages and disadvantages of the APR-2 gearbox?

20. How is the maximum torque on the rotator of a mechanical key ensured?

21. How is the rotation of the split ring gear ensured?

22. How is the APR-2VB key mounted at the wellhead?

23. Features of drilling rotor with hydraulic drive.

24. Why is the high-speed rotor shaft mounted on thrust bearings?

25. What type of gearing does the rotor gear pair have?

26. How and why is the rotor table locked?

27. How is the power take-off to the winch in the UPT1-50 unit?

28. How many gears does the gearbox of the AzINmash-37 A installation have?

29. What types of couplings are used on the A50U unit?

30. Appointment of a hydrodynamic brake on the AKI-80 unit.

31. Purpose and principle of operation of the anti-drug.

32. What is the essence of the calculation to determine the rational use of the lift?

33. Purpose of the hydraulic system of the units.

34. Purpose of the compressor on the unit.

35. How is the swivel shaft fixed in the body?

36. What is the difference between a ram preventer and a universal one?

37. What is the difference between blind and pipe dies?

38. How are BOPs controlled?

39. The principle of operation of a screw downhole motor.

40. Purpose and principle of operation of the barbell.

41. Similarities and differences between TV, TVM, TNZ and TNO pipe spears.

42. Difference between MEU and MES taps.

43. Purpose of the bell.

44. Appointment of the milling reamer FRL.

45. The purpose of the seal is universal.

46. How is logging cable retrieved?

FISHING TOOL (a. catching tool; n. Fanggerat, Fangwerkzeuge; f. outil de repechage, attrapeur, attrapetout; i. arpon pescatubos) - devices and mechanisms used to extract from a stuck drill string, its individual elements, downhole motors or foreign items. By purpose, the fishing tool is conditionally divided into the main one (catchers, overshots, taps, bells, magnetic milling cutters, etc.), used for direct connection with the emergency object and its subsequent removal from the well, and auxiliary, which serves to study the emergency object and prepare for liquidation accidents.

Catchers (Fig. 1) are used to extract the part of the drill string remaining in the well by connecting it to its upper end by gripping the outside of the pipe or lock.

The catcher consists of a body in which axially movable rams are installed, fixed with dowels from rotation relative to the body. In the lower part, the catcher is threaded with a guide funnel, in the upper part - with an adapter or pipe. On the dies, a left-handed screw thread is made along their inner surface. The contact surfaces of the body and rams are made conical, which ensures a reliable grip of the upper end of the emergency pipe.

Extraction of the emergency drill string (up to 400 m long) by capturing its upper end under the lock is carried out with an overshot. The overshot consists of a body, inside of which spring plates are installed, grabbing the joint of the drill pipe. Having completely skipped the lock, the plates are installed with their upper ends against the supporting end of the lock, which ensures that the pipe is captured when lifting the overshot.

If the upper end of the emergency string ends with an internal thread, then taps are used for fishing operations. Taps with a right-hand thread are used to extract the remaining column as a whole, with a left-hand thread - for unscrewing and extracting the column in parts. Often, taps are used with a centering device (Fig. 2), which increases the accuracy of its entry into the hole of the emergency string. A signal indicating that the tap has entered the hole correctly is a pressure surge on the pump that supplies the flushing fluid.

In cases where large torques and axial forces are required to eliminate an accident, bells (Fig. 3) are used, which are connected to the emergency pipe along its outer surface, or pipe spears (Fig. 4), which are used at large depths and small annular gaps between the wall wells and emergency pipe.

The fishing sleeve of the spear is made longitudinally cut with a conical inner surface (the slope angle is about 2°). The surface of the spear body contacting with it has the same angle. With the help of a guide cone, made at the end of the body, the spear is inserted into the emergency pipe. When lowering, the fishing sleeve first abuts against the end of the pipe and moves in the upper position, where, under the action of part of the mass of the working string and due to the presence of a cut, it is compressed and goes inside the pipe. Further, when the working string is tensioned, the fishing sleeve expands due to interaction with the body along the conical surfaces and cuts into the body of the emergency pipe, providing a reliable grip. The design of the spear eliminates the deformation of the pipe when it is captured.

To clean the bottom of the well from foreign metal objects, a magnetic milling cutter is used (Fig. 5), consisting of an adapter, a body, upper and lower poles, a bushing, a magnet and a bit.

Downhole milling cutters are used to clean the bottom of the well from foreign metal objects by grinding them. As an auxiliary fishing tool, a shoe mill is used, with the help of which the ends of emergency strings are prepared and rocks and metal objects are destroyed in the annular space between the emergency pipe and the borehole wall. To extract foreign objects from the face, so-called spiders are also used (Fig. 6).

The rope or logging cable left in the well is retrieved using the so-called ruff (Fig. 7).

A funnel is placed above the ruff hooks, which serves to fix the retrieved rope and prevent it from jamming in the well. If the lifting capacity of the derrick and traveling system is insufficient to free the drill or casing string from sticking, then hydraulic jacks are sometimes used for this purpose.

In cases where it is not possible to release the stuck string or it has complex fracture contours, a fishing tool is used, with which the string is cut for the purpose of subsequent extraction from the well in parts. The pipe is cut from the outside with an external pipe cutter (Fig. 8).

To cut the pipe from the inside, internal pipe cutters are used. The dismemberment of the emergency string is also carried out with the help of torpedoes, to determine the location of which in the well, a magnetic locator is used (Fig. 9).

With the help of a locator, coupling and interlock connections are registered.

Fishing operations are understood as a set of operations necessary to free the wellbore from foreign objects before drilling is resumed in it.

Fishing tool. For fishing operations, special (fishing) tools of various types and purposes are used. Let's dwell on the main ones.

The taps are designed to catch the drill pipe string remaining in the well if a break occurs in the thickened part of the pipe, in the lock or coupling. The right taps are used to extract the entire string, and the left taps (on the left drill pipes) are used to extract the string in parts.

The fishing tap has the shape of a truncated cone for cutting into the details of the lock of drill pipes during fishing operations. At the upper end of the tap, a drill pipe lock thread is cut, and at the lower end - a special fishing thread (right or left).

The bells are used to catch drill or casing pipes when a break occurs in the body of the pipe, as well as when the threaded connections of the pipe are broken, except for cases when the thread is broken from the side of the lock nipple.

If the breakage is uneven with bands or there is a crack along the pipe that is not covered by the bell, then for fishing it is necessary to use a “through” (open) bell with an appropriate branch pipe or pipe. To extract the bit remaining in the well due to unscrewing or stripping of the thread, a bell-caliber is used.

The right bells are used when catching the entire remaining string with the right drill pipes, and the left bells are used when catching with the left drill pipes to unscrew part of the left string.

Bells are made from forged blanks, in the upper part of which threads are cut to attach to drill pipes. In the lower part of the bell, an internal fishing thread of a special profile is cut to grip drill pipes during fishing operations.

When the end of the drill pipe remaining in the well turned out to be uneven as a result of breaking and there are longitudinal cracks, then a “through” (open) slip with an appropriate branch pipe or pipe is used to catch the first from the broken end of the coupling or for the whole part of the pipe. The slip allows the well to be flushed through the trapped drill string. If the rest of the column cannot be lifted, the slip can be released.

The overshot is used to extract the drill string with a locking grip. It is used mainly where the catcher cannot be used, and the bell and tap cannot be connected to the remaining part of the drill string at the bottom, and where the length of the string does not exceed 400 m and it is not stuck.

An overshot is a body made of a thick-walled, usually shoe-type tube, inside of which four steel springs are riveted. The upper ends of the springs are bent according to the size of the drill pipes for which the overshot is intended.

An external pipe cutter is used in cases where it is not possible to release a stuck drill string using oil, water, acid baths or by torpedoing and the pipes remaining in the well are not bent.

A fishing rod (“ruff”) is used to retrieve the steel rope and logging cable left in the well. A fishing rod is made by welding hooks onto a rod or a tap in a checkerboard pattern, or from a casing pipe, on the body of which cuts are made that bend inward. It is forbidden to lower a fishing rod (“ruff”) into the well without a special clamp that limits the passage of this tool to the area where the abandoned rope or cable is located.

Withdrawal hooks are designed to center the end of the drill pipe remaining in the well.

The diameter (outer) of the hook mouth is usually 52 - 50 mm less than the diameter of the well. On the inner surface of the throat of the hook, before descending into the well, notches are made, according to the workability of which they judge (after lifting) how the hook worked, whether it touched the column or not. It is allowed to use a retractable hook only when it freely reaches the “head” of the break.

The milling cutter is used for partial or complete removal of metal protruding parts or parts. The work of a milling cutter (milling) consists in the destruction of a metal object and turning it into chips. The external shape of the router depends on its purpose:

a) frontal action: flat; conical; and cylindrical;

b) external influence: in the form of a truncated cone, conical , cylindrical and cylindrical-conical.

c) internal impact: cylindrical-conical shape and combined impact.

LIQUIDATION OF ACCIDENTS

Elimination of accidents with drill pipes and bits

Successful recovery of drill pipe accidents depends to a large extent on how soon the moment of pipe breakage is noticed. When accidents with drill pipes are detected, the driller lifts them at maximum speed. The raised end of the broken part of the drill string at the surface is cleaned, washed and inspected to ascertain the nature of the break. Then, the number of candles remaining in the well is counted, the depth at which the upper end of the broken pipe string is located is determined, and measures are planned to eliminate the accident.

Work to eliminate an accident (any) in a well is carried out by a drilling foreman under the guidance of a senior engineer (foreman) for complex work or a chief (senior) engineer of a drilling enterprise (exploration, site), depending on the complexity of the work.

Before lowering the fishing tool into the well, a sketch of its general layout and fishing part is drawn up, indicating the main dimensions. To catch the drill string, a catcher (slip) with flushing, a tap or a bell is used. These tools make it possible to reciprocate and clean out the well after grabbing the remaining drill string. The length of the fishing tool lowered into the well should be selected in such a way that the fishing tool is fastened by a rotor with a leading drill string passed through the rotor table.

A catcher (slip) is used both for catching a lock and for a pipe. To extract the string with a catcher, they give a stretch, turn on the mud pump, restore circulation, and then begin to lift it. If the column does not rise, it is walked around without rotation.

The tap is usually run with a larger diameter guide tube ending in a funnel. The tap, lowered on the drill pipes, covers the torn end of the pipe with a funnel and enters the inside of the pipe with a cone until it rests against the edge of the pipe. Raising the drill string a little to relieve pressure on the broken end of the pipe, turn it clockwise by 90 °, then back by 45 ° and again by "/4 turns clockwise. When the drill string is gradually lowered down, the tap cuts into the pipes and is fixed in them. It is forbidden to finally fix the fishing tool on the scrap until the circulation of the drilling fluid through the bit is restored. After that, they try to raise the string. In case of sticking, they walk around. When walking, it must be remembered that lifting forces above the permissible ones cause the fishing tool to break, break the drill pipes , breakage of the drilling line or destruction of the tower.If the circulation cannot be restored, the tap is torn off under tension.

Similarly to the one described, work is underway to connect and extract the remaining column with the help of a bell.

With a strong deviation of the end of the string from the center of the well, it is taken to the center by means of a withdrawal hook, and only after that a tap or a bell is lowered.

When, even after the restoration of circulation, it is not possible to free the column by pacing, resort to an oil bath or take other measures. If all attempts to release the tool are unsuccessful, they proceed to unscrew it in parts with the left tap or bell on the left pipes. Sometimes, instead of unscrewing in parts, the milled part of the remaining tool is cut out using an external pipe cutter. In this case, the cut off part is removed from the well along with the pipe cutter.

The main tool for extracting bit parts remaining in the well is a magnetic milling cutter, which is lowered into the well on drill pipes. Before reaching the bottom of 6 - 7 m, flushing begins, rotating the rotor at low speed. Having reached the face, with a small axial load, the milling cutter collects the remaining parts in the center of the face, the magnetic milling cutter bit is drilled into the rock, the lower pole approaches the parts remaining on the face and holds them. Then flushing stops and the rise of the drill string begins. In no case should you work on the remaining metal parts for a long time - this in most cases leads to a complication of the accident. A magnetic milling cutter is also used to catch all kinds of small metal objects that have fallen into the well.

Elimination of accidents with turbodrills

Accidents caused by thread breaks in a turbodrill are eliminated fairly quickly with a gauge (turbodrill sub is usually used as a gauge) screwed onto the broken thread of the body, or with special catchers that grab the turbodrill by the heel locknut, or with a special tap passed inside the upper hole of the shaft. Bit jamming causes great difficulties in turbine drilling. In this case, bit breaking by rotation of the drill string with the help of a rotor is excluded, since the bit and the drill string are connected through the turbodrill bearings and the rotation of the drill pipes leads to the rotation of only the turbodrill body. Therefore, before hitting the bit with rotation, it is necessary to wedged the turbodrill shaft in the body. To do this, it is necessary to throw small metal objects into the pipes. Throwing these objects should be carried out with drilling fluid pumping in order to ensure that small metal objects enter the turbine of the turbodrill. When drilling fluid is pumped and the drill string is slowly rotated by the rotor, metal objects, falling between the upper blades of the upper turbine stages, destroy these blades, which, in turn, fall into the next stages and cause the stators and rotors to jam.

In the event of a shaft jamming in the turbodrill body, the bit is beaten off in the same way as in rotary drilling, by rotating the drill string, since the rotation of the drill pipes will also ensure the rotation of the bit.

Accidents during drilling of the same well can occur when turbodrills of smaller diameters are replaced by turbodrills of larger diameters. This is explained by the fact that benches are formed in the borehole walls at the transition points from one rock to another, which determine the passability of a given standard size of a turbodrill with a well-defined bit diameter.

Moving away from the tool left in the well. When the drill string left in the well cannot be lifted or when it takes too long to retrieve it, one should move aside, i.e., drill a new (second) wellbore. To do this, above the place where the end of the remaining tool is located, they begin to drill a new shaft.

If there is no strongly curved section in the wellbore, from where it is most convenient to drill, a cement bridge is placed over the remaining column and, after it has hardened, a new wellbore is drilled using a rotary or turbine method, Well torpedoing. Works to eliminate accidents in wells sometimes last a long time and do not give positive results. In these cases, it is advisable to torpedo the string remaining in the well, and then drill a second wellbore to the target depth. Torpedoing consists in the fact that an explosive is lowered into the well to a certain depth, which, exploding, destroys the column remaining in the well.

For successful crushing of large metal pieces or for driving them in a crushed state into the walls of the well, a projectile with an explosive (torpedo) is installed in close proximity to the object to be destroyed. To do this, they carefully work out with a chisel the place where the projectile should be installed, first lower the template, and then lower the projectile with explosive for an explosion.

For explosion inside stuck drill pipes, a torpedo should be used, the diameter of which should be 10 mm less than the diameter of the bore of the drill pipes. The torpedo must be blasted against the collar or lock, otherwise the explosion may result in only a longitudinal crack in the pipe, which will be useless, because it will not be possible to raise the upper part of the drill string.

Casing accidents

The most common type of casing failure is loosening the casing shoe and rubbing the casing. The column shoe is unscrewed when the bottom of the string is not secured, for example, when the cement is pumped above the shoe or has not seized at the shoe. With further drilling, especially in a rotary way, the non-cemented shoe is unscrewed from friction of the drill pipe couplings. To determine the location of a loose shoe, a seal made from a piece of casing is usually lowered into the well. The bottom of the seal is funnel-shaped. A wooden cork is inserted into this part, into which nails are hammered; nails are braided with wire and filled with tar or lead. The seal is lowered to the unscrewed shoe. The imprint is used to judge how the shoe is located in the well. Such an accident is eliminated with the help of pointed bits, which tend to put the shoe vertically so that the full size bit passes freely through it. The best remedy against the occurrence of such accidents is the strengthening of the lower pipes of the conductor and technical columns by welding. During long-term operation, drill pipes with their couplings and locks sometimes completely wipe the casing pipes. Safety rings serve as a means of protection from wiping. Casing wiping will be much more intense in a deviated well.

When there is a cement sheath against a worn casing string, no complications occur in the string during the drilling process. If there is no cement sheath, then the casing pipes can be torn in bands during drilling, which makes it difficult for the bit to pass. If, in addition, there are crumbling rocks behind the pipes, wiping may be complicated by crushing. In all these cases, the only measure to eliminate the accident is running and cementing an intermediate casing of a smaller diameter.

Fishing operations are understood as a set of operations necessary to free the wellbore from foreign objects before drilling is resumed in it.

Fishing tool. For fishing operations, special (fishing) tools of various types and purposes are used. Let's dwell on the main ones.

The right bells are used when catching the entire remaining string with the right drill pipes, and the left bells are used when catching with the left drill pipes to unscrew part of the left string.

An external pipe cutter is used in cases where it is not possible to release a stuck drill string using oil, water, acid baths or by torpedoing and the pipes remaining in the well are not bent.

Withdrawal hooks are designed to center the end of the drill pipe remaining in the well.

a) frontal action: flat; conical; and cylindrical;
b) external influence: in the form of a truncated cone, conical, cylindrical and cylindrical-conical.
c) internal impact: cylindrical-conical shape and combined impact.

Fishing tools:

a - slips; b - bell; c - tap; g - magnetic milling cutter; d - spider

Elimination of accidents with drill pipes and bits

Successful recovery of drill pipe accidents depends to a large extent on how soon the moment of pipe breakage is noticed.

When accidents with drill pipes are detected, the driller lifts them at maximum speed. The raised end of the broken part of the drill string at the surface is cleaned, washed and inspected to ascertain the nature of the break. Then, the number of candles remaining in the well is counted, the depth at which the upper end of the broken pipe string is located is determined, and measures are planned to eliminate the accident.

The catcher (slips) is used both for catching by the lock and by the pipe. To extract the string with a catcher, they give a stretch, turn on the mud pump, restore circulation, and then begin to lift it. If the column does not rise, it is walked around without rotation.

The tap is usually run with a larger diameter guide tube ending in a funnel. The tap, lowered on the drill pipes, covers the torn end of the pipe with a funnel and enters the inside of the pipe with a cone until it rests against the edge of the pipe. Raising the drill string a little to relieve pressure on the broken end of the pipe, turn it clockwise by 90 °, then back by 45 ° and again by "/4 turns clockwise. When the drill string is gradually lowered down, the tap cuts into the pipes and is fixed in them. It is forbidden to finally fix the fishing tool on the scrap until the circulation of the drilling fluid through the bit is restored. After that, they try to raise the string. In case of sticking, they walk around. If the circulation cannot be restored, the tap under tension is torn off.

Similarly to the one described, work is underway to connect and extract the remaining column with the help of a bell.

With a strong deviation of the end of the string from the center of the well, it is taken to the center by means of a withdrawal hook, and only after that a tap or a bell is lowered.

Pipe spear external released type tln and tlnt.

Purpose of the product:

The external releasing spear is designed for gripping by the outer cylindrical surface and subsequent extraction of elements of tubular strings during fishing operations in wells.

TLN - for standard working conditions.

TLNT - for difficult working conditions.

Design:

The external releasing spearhead includes a sub, a body, a funnel and a set of replaceable elements (collet or spiral guide rings).

The freed-up pipe spear can additionally be equipped with:

- extension cords, 500...1000 mm long;
- guide funnels of increased diameter;
- restrictive sleeve.

To ensure the sealing of the connection of the pipe spear with the emergency string, it is possible to install sealing packers when using grips (installed in the annular groove of the upper part of the body).

The external releasing pipe spear has two versions - right and left.

Purpose Tapered fishing taps are the simplest and most economical internal gripping tools for retrieving a tool from a hole. They come in a variety of sizes, lengths and connections, or can be custom made to customer specifications.

Design The fishing tap is cast in one piece from a high-grade alloy and subjected to a special heat treatment for strength. There are two types of fishing taps: plain and skirted.

Simple type Fishing taps of simple type do not have a thread on the outer diameter of the shoulder.

Skirt type Fishing taps with a centering direction are designed to move the tool for proper grip and retrieval of the tool. The outer diameter of the shoulder has a thread for a skirt. Skirts can be with a simple head, with a head with an edge or a thread. Threaded head skirts must be used with oversized guides. Skirted fishing taps and threaded head skirts have thread protection.

Rods All taper taps are made with hardened rods (cutting teeth) that provide a good grip for light retrieval work and a strong, secure grip on the tool.

Standard bars have a simple, sealed design with no grooves to allow circulation below the sticking point. Grooved rods are available on request. They are designed to provide circulation to flush out cuttings when gripping the tool. All conical fishing taps have a circulation hole in the center.

Right-handed clockwise rotation grapple bars are standard on taper fishing taps. Left hand bars available on request. There is no additional cost for left-hand bars.

Removing the tool from the well. A taper tap is attached to the fishing string and lowered into the hole on the top of the tool. Apply less than 1 lb. of force and rotate the tap until the tapered thread engages the tool. Excessive force and rotation can damage the bars. When a firm grip is achieved, stop rotation and lift the tool out of the hole.

fishing bells

Purpose Fishing bells are the simplest external fishing tools for retrieving a tool from a hole. The bells come in two types: type A and type B. They can be of various sizes, lengths and connections and can be manufactured according to the customer's specifications.

Type A Type A fishing bells have an internal guide. The end of the bell guide can be flattened or with folded edges.

Type B Type B fishing bells have a bottom threaded to accept a standard guide with folded edges or your choice of retractable hook.

Construction All fishing bells have reinforced rods to ensure a secure grip on the tool.

Standard bars have a simple, sealed design with no grooves to allow circulation below the sticking point. Grooved rods are available on request. They are designed to provide circulation to flush out cuttings when gripping the tool. All fishing bells have a circulation hole in the center.

Right hand clockwise rotating grapple bars are standard on fishing bells. Left hand bars available on request. There is no additional cost for left-hand bars.

Operation The fishing bell is attached to the fishing string and lowered to the tool. Applying less than 1 pound of force on rotation allows the tool to be gripped. The tool can be lifted out of the hole when a firm grip is made.

Fishing magnets and magnet charger

Purpose Fishing magnets are designed to retrieve small, irregularly shaped metal objects from the bottom of a borehole, such as milling chips, cone bits, cutters, bearings, dies, key bolts, and hand tools. Usually these items are the result of broken bits, the accumulation of fallen parts from indestructible objects. In almost all of these cases, the object left in the well cannot be captured in the usual way. Fishing magnets successfully remove these objects from the well. A distinctive design feature of the tool are wide flush holes, from which chips and other debris are washed out, which can interfere with contact with the magnet. Various guides are also produced to adapt to any fishing application. Construction The fishing magnet consists of a housing, built-in housing, built-in pole plate, magnetic element and a standard flushing guide funnel. The body is made of high-strength alloy steel with a tool joint pin on top and wide flush holes. The magnetic element is the most efficient and powerful permanent magnet. If necessary, the magnet can be charged again. During assembly, the magnet body, shroud, and pole plate are threaded and welded to the magnetic element in place. The standard flush funnel at the bottom is threaded and can be easily removed. Edged guide funnels and milling guide funnels are also produced. Operation Fishing magnets usually work on tubing or drill pipe, but can also work on wireline. Rope adapters available. Fishing magnets are attached to the bottom end of the fishing string and are lowered into the hole to a depth of six to twelve inches of the left tool. Circulate to flush the left item. Decrease the circulation and lower the fishing magnet towards the object. Rotate slowly to ensure positive contact. Stop the circulation and lift the fishing magnet out of the hole.

Optional accessories Guides A flushing guide funnel is standard. Also available are guide funnels with edges and milling guide funnels. A guide funnel with edges center the object to ensure contact with the magnet. The milling guide funnel allows any soft structure to be crushed or sediment to be separated to release debris at the bottom of the well. Storage Cells Since magnets must not lose their power during normal use, storing a magnet near an electric motor or bringing the magnets too close together can adversely affect their charge. To reduce the attraction of various metal objects or particles, it is recommended to use cells for storing magnets. Cells for storage are necessary for air cargo transportation.

Magnet chargers With our advanced remote control, recharging is quick and easy. There are no restrictions on the number of repeated charges for a magnet. Magnetic chargers guarantee maximum charging performance with ease of use and long service life.

Fishing fender subs

Purpose One of the most commonly used fishing tools is the jack sub or mechanical jar. The design of the tool allows you to transmit rotation and freely flush the well at any time. The Fishing Breaker Sub can be used to strike up and down to grab or release overshots or spears, or as a feed tool for milling or cutting. Standard operations also include freeing stuck drill pipe, drill collars, tubing, test tools and safety (disconnect) subs. The Fishing Breaker Sub can be used in conjunction with an overshot or spear.

Construction This simple tool consists of five main elements: the top sub, the striker, the middle body, the stem body, and the stem itself. All components are made from high quality heat treated alloy steel. The hexagonal shape of the stem provides movement within the stem body, matching the shape for downhole rotation. The standard 20″ stroke is suitable for most applications, and subs are also available with longer strokes of 30″, 36″, 42″, 48″, and 60″. A striker O-ring, seal guard and anti-extrusion ring are supplied with the standard hammer. Chevron hammer packing sets are available upon request and are recommended for extended circulation through the fishing sub.

Operation A fishing sub usually operates directly over a spear, overshot, screw-in sub, or safety (disconnect) sub. When a load is applied, the impact sub will slide open until the hammer strikes the stem. If the drill string is unloaded to the fishing sub, the stem body will slide down the stem until the bottom shoulder of the stem body strikes the top shoulder of the stem.

Using Downstroke At the surface, mark the open and closed positions of the fishing fender sub on the pipe. Raise the fishing string to expose the fender and allow additional string extension. Throw the string hard and brake to a stop about 4-6 inches above the closed position of the impact sub to give a hard downward blow. To transmit a strong downstroke, throw the entire weight of the fishing string without applying the brake.

Using the upstroke At the surface, mark the open and closed position of the fishing fender sub on the pipe. Raise the fishing string to expose the fender and allow further stretching of the string. Throw the column exactly as far as it was stretched and stop it with the brake. As soon as the pipe bounces off the bottom of the hole, the impact sub will give a sharp upward blow.

Fishing tool for lifting packers

Purpose The packer puller is designed to remove drillable full bore packers from casing strings. If necessary, with the right tooling, the tool can cut through the packer. Once the fishing tool cuts through the packer to capture the bottom end of the packer, it will always be in a suitable catching position, making milling and catching in one run and run possible. The tool can be released and recaptured, and can also be used in conjunction with the jar knot.

Design The packer pulling tool consists of only three parts: top sleeve, stem, and rams. An optional screw plug is available which can be coated with tungsten carbide.

Operation The fishing tool for lifting the packers is installed on the lower end of the milling unit. Sufficient extension subs allow the packer fishing tool to clear the packer hole from the bottom end before the equipped shoe or cutter comes into contact with the outer surface of the packer. As the packer-lifting tool enters the packer, the catcher slip is forced upward to allow passage through the packer opening. The ram automatically drops into the trap position as it clears the bottom end of the packer. Milling can now be carried out and the packer removed. The fishing tool for lifting the packers must always be in the catching position. It will not release the packer prematurely due to sudden packer movement and will withstand strong downward pull. If necessary, once the slip has made contact with the packer walls, the tool can be released by right-hand rotation and sinking of the fishing string.

Purpose Mechanical jars are used for any cable work in the well, where it is necessary to release the tool remaining in the well with the help of a jar. They are particularly suitable for use as accessories for shear pins, actuating pistons and other similar applications. They are simple, light in weight and have a particularly robust design, unpretentious in maintenance.

Overshots

Purpose

The overshot is a versatile fishing tool used in the oil and gas industry.

Its purpose is the capture, sealing, extraction and release of the caught tool of various types. Reliability Simplicity and ruggedness of design are the main qualities for which overshots are preferred to other types of external grip fishing tools in the oil and gas industry.

The range of the company includes 4 most commonly used types of overshots:

overshot for 10 series sucker rods
overshot for 20 series small diameter sucker rods
Series 70 Small Diameter Releasing Overshot
150 series release overshot with flushing

Each overshot of different series has a different strength, which is reflected in the tool code

A - high strength (FS) for all torsion and impact tensile loads

B - very high strength (XFS) for excessive loads

C - increased strength (SFS) maximum strength for special well conditions

D - small diameter holes (SH) for high tensile loads only

E - very small diameter wells (XSH) for coiled tubing lifting only

If operating conditions (casing, hole size and retrievable tool size) allow, the use of high strength overshots, type A, is recommended.

Overshot Components

Top sub

The top sub is the top component of the overshot. It is usually equipped with a tool joint according to the customer's specifications to ensure good adhesion to the retrievable string.

The body, the main working component of the overshot, is located between the top sub and the guide. The inside diameter has a threaded section that matches the external thread of the ram gripper. This design allows you to evenly distribute any expansion or compression stress over the entire working surface of the body, grip and retrieved tool. The possibility of damage to the tool or overshot is minimized.

guide

The lowest component of an overshot is the guide. As the name suggests, it guides the tool into the internal grip mechanism (plate grip) of the overshot. The guide also minimizes the possibility of damage to the overshot by preventing the passage of a tool larger than the maximum size of the overshot.

gripping mechanisms

The gripper attaches to the body and is the overshot gripper mechanism. There are two main types of grabs: spiral and basket.

spiral grip

The shape of the left-hand spiral of the spiral grip corresponds to the internal beveled notch of the clip. The special hardened internal notch of the gripper ensures positive fixation of the extracted pipe.

basket grip

Basket grip - a split expanding cylinder, on the inner surface of which notches are made to fix the retrieved tool. Its conical outer part matches the inner part of the case. There are three types of basket grapples for different fishing applications: simple (standard), short pipe stop and long pipe stop.

Regular basket grip

The conventional basket grapple is used to retrieve a pipe or tool with a constant outside diameter. During fishing operations, the retrieved tool passes completely through the grip. Notches along the entire length of the inner part of the grip securely fix the retrieved tool. The regular basket grapple is standard equipment on all overshots and is always supplied unless another grapple type is specified.

Basket gripper with stop for removing short pipes

This grip is used to retrieve couplings attached to a ruptured section of pipe located above the coupling. Two sections of notches with different inner diameters are used. The smaller diameter notches grip the pipe above the transition sleeve and act as a stop to ensure that the larger diameter notches grip the sleeve before sealing with the packer.

Basket grapple with stop for catching long pipes

This type of basket grapple is designed to retrieve tool joints and adapters while leaving enough length below the grapple to pack with a conventional or milling packer. An internal stop on the top of the grip prevents the pipe being retrieved from being completely passed through the grip. This stop also serves to position the basket packer on the retrievable pipe/tool for optimal sealing.

Gripper control devices

The grapple control device acts like a key that transmits torque from the overshot body to the grapple while allowing the grapple to move vertically within the body while working. There are two types of gripper controls: spiral and basket. Helical control devices are used with helical grips and always have a conventional design, i.e. do not have milling teeth or sealing mechanism. Basket grapple controls are used with basket grapples. They may be of conventional design, and may also have a sealing mechanism and/or milling teeth.

Sealing mechanism

When fishing requires circulation, a sealing mechanism must be used to circulate through the retrieved pipe rather than around it. The type of sealing mechanism is determined by the type of grip used (spiral or basket).

Type A packer

Type A packer is used in overshots equipped with helical grips. The Type A packer seals the outer surface with the inner surface of the body. The packer has an inner edge that provides a seal along the diameter of the extracted pipe. Each Type A packer is designed to seal a specific size retrievable pipe according to the size of the helical grip; a separate packer must be ordered for each grapple size.

Packer with milling face

The Cutter Face Packer is used in conjunction with overshots equipped with a basket grapple. There are two types of milling packers: plain and milling face packers. A simple packer is used when milling is required prior to fishing. A cut-off packer should be used if minor straightening of the pipe to be retrieved is required before gripping. Only one milling packer can be installed in an overshot assembly at a time.

Milling packers are made to fit specific size basket grapples. A separate milling packer must be ordered for each size of basket grips ordered.

Overshot Accessories

The 150 Series Circulating Releasing Overshots can be equipped with a wide range of accessories including: extension subs, oversized guides, hook guides, milling guides, internal and external seals for milling packers, milling E-type packers.

Lead Borehole Seal

Purpose Lead borehole printing is an effective tool used to determine the dimensions, configuration, conditions and location of the upper end of the object left in the borehole. Construction Lead borehole seals have a body made of high-strength alloy steel and a soft lead insert at the bottom end. All downhole seals (with the exception of seals with sucker rod connections) have a chute for flushing the top of the abandoned item before the seal is lowered onto it. Lead seals without a groove can be provided upon request. The range of outside diameter of the lead part is from 1 to 12 ¼ inches. Additional sizes are available upon request.

Operation Attach a downhole seal to the bottom of the fishing string and lower into the hole. Don't spin. Slowly lower the well string until it contacts the abandoned object. Place a weight on the well seal and lift it out of the well.

Fishing rod type “U” Fishing rod type “U” - is intended for capture with subsequent extraction of rope, electric cable and wire from the well. The rod consists of a body, a sub with a funnel, three hooks, and a pointed tip.

The design of the “U” type fishing rod: - On the body, in the upper part, there is a thread designed for connection with drill pipes. - On the case, in the middle part, at an angle of 120 degrees, open hooks are located. - On the body, in the lower part, on the threaded connection, a pointed tip is fixed. - Above the hooks there are grooves for laying the captured element. - On the bottom of the sub there is a funnel designed to center the rod in the hole.

A broken rope, cable or wire is picked up by hooks, and when the rod is rotated, it is wound around its body, after which the tool is lifted to the surface.

Spider hydraulic PG

Purpose

The reverse circulation hydraulic spider is used to extract from the well a variety of debris, drill bit cutters, bearings, broken rams, cable scraps, various hand tools, fragments and fragments of broken drill pipes (as a result of twisting), milling chips and so on.

Design The hydraulic spider has two versions: right and left, depending on the direction of the connecting threads, and eight versions of the annular router, which are determined by the shape of the soldering of the cutting-abrasive surface - flat, wavy, serrated, protruding or ground flush with the body. The hydraulic spider is screwed onto the column using the top sub. In addition to the top sub, the components include a catcher, a body with a seat and a ball valve funnel, and an annular cutter. The catcher is made of manganese bronze, equipped with long and short fingers alternating and elongated towards the center of the device.

Seal

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