CN210195710U

CN210195710U - Fracturing anti-jacking tool

Info

Publication number: CN210195710U
Application number: CN201920945334.4U
Authority: CN
Inventors: Weicheng Liang; 梁伟成; Chuang Liang; 梁闯
Original assignee: Liaoning Xinhua Instruments Co Ltd
Current assignee: Liaoning Xinhua Instruments Co Ltd
Priority date: 2019-06-22
Filing date: 2019-06-22
Publication date: 2020-03-27
Anticipated expiration: 2029-06-22

Abstract

A fracturing anti-jacking tool comprises an upper transmission shaft, a middle transmission shaft, a lower transmission shaft, an upper central tube, a lower central tube, an upper cone, a lower cone, slips, an edge rubber cylinder, a middle rubber cylinder, a release ring and a lower working cylinder, and is characterized in that the fracturing anti-jacking tool is connected to the release sleeve in a key way and placed in a key groove of the upper transmission shaft; the lower part of the middle transmission shaft is provided with a ball groove; the upper central tube is provided with a ball hole for placing a steel ball; the upper cone is fixed on the transmission joint through a deblocking pin, and the lower part of the upper cone is fixed on a lock ring groove of the upper central tube by using an upper snap ring; the limiting pin connected to the lower cone is positioned in the pin groove on the guide sleeve, and the inner end of the guide pin connected to the guide sleeve is positioned in the pin groove of the lower cone; the clamp spring is arranged in the mounting groove on the fixed piston, and the inner cylinder of the release cylinder is provided with anti-falling inclined teeth opposite to the direction of the anti-falling inclined teeth of the clamp spring. The utility model discloses all can prevent spouting down, the shutoff is effectual, and it is convenient to sit the seal, and the anchoring is simple firm, saves time, reduces the operating cost, plays down safety.

Description

Fracturing anti-jacking tool

Technical Field

The utility model relates to an instrument in pit of oil development, especially fracturing well packer need not play out, directly accomplishes the shutoff after the fracturing and open flow function, can drop the fracturing that the oil-well pump produced at any time and prevent a instrument.

Background

In oil exploitation, a plurality of oil wells which cannot be operated due to high pressure exist, particularly, the oil wells after fracturing have large liquid outlet amount and high pressure, cannot be operated and put into production, can be operated only after pressure relief or adopt operation under pressure, and obviously improves the production cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a top instrument is prevented to fracturing to overcome current high-pressure well operation difficulty, the problem that the oil well can not in time be put into production behind the fracturing. The sealing effect is good, the setting is convenient, the operation is reliable, the sealing device can be put into a well along with a fracturing pipe column, the pipe column is lifted to a position above a perforation well section after fracturing, slips are anchored by rotating 10-12 circles (ensuring complete connection of oil pipe threads), the pipe column is lifted to compress a rubber sleeve to complete the setting, and the sealing device can be put into production by inserting a poking rod along with a pump. Can work in the underground for a long time.

The technical scheme of the utility model as follows: including the top connection, go up the transmission shaft, fixed cover, the release cover, salvage the joint, the transmission cover, well transmission shaft, lower transmission shaft goes up the center tube, lower center tube, goes up the cone, slips down go up the pressure cap, limit packing element, gasket, well packing element, release ring, lower working barrel, characterized by: the upper transmission shaft is provided with a liquid inlet hole and a key groove, and the fixed sleeve is connected with the release sleeve through a release pin. The thrust spring is arranged outside the fixed sleeve; the key is connected to the release sleeve and placed in the key groove of the upper transmission shaft; the lower part of the middle transmission shaft is provided with a ball groove. The upper central pipe is provided with a guide pin groove, a lock ring groove and a trapezoidal thread, the lower part of the upper central pipe is provided with a ball hole, the ball hole corresponds to the ball groove at the lower part of the middle transmission shaft, and a steel ball is placed in the ball hole and fixed on the outer side of the middle transmission shaft through the steel ball; and a guide pin is assembled on the transmission joint and is connected to the pin shaft groove of the upper central tube in a sliding manner through the guide pin. The upper cone is fixed on the transmission joint through a deblocking pin, and the lower part of the upper cone is fixed on a lock ring groove of the upper central tube by using an upper snap ring; the lower cone is provided with trapezoidal threads which are matched and fixed with the trapezoidal threads of the upper central tube; the lower slip sleeve and the guide sleeve are of an integral structure formed by welding two parts into a whole, four rectangular holes which are uniformly distributed in the circumferential direction are formed in the integral structure, each rectangular hole corresponds to each slip, a pin groove is formed in the guide sleeve, a pin groove is formed in the lower cone, a limiting pin connected to the lower cone is located in the pin groove, and the inner end of the guide pin connected to the guide sleeve is located in the pin groove of the lower cone; the friction body is connected with the guide sleeve through threads; a nail groove is processed at the lower part of the lower transmission shaft, and a pin groove and a locking ring groove are arranged on the lower central pipe; the connecting joint is connected with the lower end of the upper central pipe through threads and clamped on a lock ring groove of the lower central pipe through an assembled lower clamp ring, the connecting joint is fixed on the lower central pipe through a lower deblocking pin, and meanwhile, the inner end of a lower guide pin assembled on the connecting joint is positioned in a pin groove of the lower central pipe; the fixed piston is connected with the lower central tube through threads and is connected to the release ring through a release pin; the clamp spring is arranged in an installation groove on the fixed piston, the clamp spring is an elastic steel ring with an opening in the circumferential direction, and the outer circumference of the clamp spring is provided with an anti-falling oblique tooth; the inner cylinder of the release cylinder is provided with anti-falling oblique teeth opposite to the anti-falling oblique teeth of the clamp spring, the release cylinder moves upwards when the tool is set, and the inner and outer anti-falling oblique teeth are engaged after the setting is finished, so that the release cylinder is clamped, namely, the clamp spring is clamped at the anti-falling oblique teeth of the release cylinder; the inner end of a transmission pin assembled on the guide ring is positioned in a pin groove of the lower central tube and a pin groove of the lower transmission shaft.

The friction body is provided with a friction block groove, a clamping block groove and an annular groove, the friction block groove and the clamping block groove are uniformly distributed and spaced along the circumferential direction, the friction block is placed in the friction block groove, the spring is placed at the lower part of the friction block groove, the clamping block is placed in the clamping block groove, and the spring is placed at the lower part of the clamping block groove.

The utility model has the advantages that: the plugging device can prevent blowout when being lifted, has good plugging effect, is convenient to set and seal, works reliably, and is simple and firm to anchor; the anti-rotation structure is arranged, and the key is not in the key groove when the well is lowered, so that midway setting caused by misoperation in the well lowering process can be effectively prevented; the fracturing pipe can be put into a well along with a fracturing pipe, the pipe column is lifted to a position above a perforation well section after fracturing, setting is completed through forward rotation, production can be carried out by putting a poking rod along with a pump, and the fracturing pipe can work underground for a long time. The time is saved, the operation cost is reduced, the lifting is safe, and the requirement of field production of the oil field is met.

Drawings

Fig. 1 is a partial schematic view of the upper part of the structure of the present invention.

Fig. 2 is a partial schematic view of the middle part of the structure of the present invention.

Fig. 3 is a partial view of the lower part of the structure of the present invention.

FIG. 4 is a schematic view (cross-sectional view) of a partial structure of a friction body.

Number of parts in the drawings: an upper joint 1, an upper transmission shaft 2, a fixed sleeve 3, a fishing joint 4, a release sleeve 5, a key 6, a transmission sleeve 7, a transmission joint 8, an upper slip sleeve 9, an upper central pipe 10, an upper cone 11, a lower slip sleeve 12, an upper snap ring 13, a slip 14, a lower cone 15, a guide sleeve 16, a positioning block 17, a friction body 18, a friction block 19, a baffle ring 20, a middle transmission shaft 21, a connecting joint 22, an outer sleeve 23, a lower central pipe 24, a lower transmission shaft 25, a lower snap ring 26, an upper pressing cap 27, an edge rubber cylinder 28, a gasket 29, a middle rubber cylinder 30, a release ring 31, a fixed piston 32, a release cylinder 33, a snap spring 34, a lower working cylinder 35, a guide ring 36, a lower joint 37, a transmission pin 38, release pins 39-1, 39-2, 39-3, a lower deblocking pin 40, a lower guide pin 41, a transmission joint 42, a clamping block 43, an inner hexagonal cylinder head screw 44 and a limit pin 45, the device comprises a guide pin 46, a spring 47, a release pin 48, a socket head cap screw 50, a thrust spring 51, a steel ball 56, a spring 57, an upper guide pin 58, a spring 59, a socket head cap end fastening screw 60 and a release pin 61.

Detailed Description

Referring to fig. 1, an upper joint 1 is in threaded connection with an upper transmission shaft 2, and the upper transmission shaft 2 is provided with a liquid inlet hole a and a key groove B. The fixed sleeve 3 is connected with the release sleeve 5 through a release pin 39-1. The thrust spring 51 is placed outside the fixed sleeve 3. The key 6 is connected to the release sleeve 5 by a socket cap screw 50 and is placed in the keyway B of the upper drive shaft 2. The fishing joint 4 is in threaded connection with the transmission sleeve 7 and is provided with an inner hexagonal cone end fastening screw 60, and an inner hole of the fishing joint 4 is provided with fishing threads C. The transmission sleeve 7 is provided with a key groove D, is in threaded connection with the transmission joint 8 and is placed on the outer side of the upper transmission shaft 2. Referring to fig. 2, the middle transmission shaft 21 is in threaded connection with the lower end of the upper transmission shaft 2, and a ball groove G is formed in the lower portion of the middle transmission shaft 21. The upper central tube 10 is provided with a guide pin groove F and a lock ring groove H, the trapezoidal thread I, the lower part of the upper central tube 10 is provided with a ball hole, the ball hole corresponds to the ball groove G at the lower part of the middle transmission shaft 21, and a steel ball 56 is arranged in the ball hole and fixed on the outer side of the middle transmission shaft 21 through the steel ball 56. The transmission joint 42 is provided with a pin shaft hole, a guide pin 58 is assembled on the pin shaft hole, the transmission joint 42 is in threaded connection with the transmission joint 8, and is connected to the pin shaft groove F of the upper central tube 10 in a sliding mode through the upper guide pin 58. The upper cone 11 is fixed on the transmission joint 42 through a deblocking pin 48, and the lower part of the upper cone 11 is fixed on a lock ring groove H of the upper central tube 10 by using an upper snap ring 13. The lower cone 15 is provided with trapezoidal threads which are matched and fixed with the trapezoidal threads I of the upper central tube 10. The positioning block 17 is fixed on the lower end face of the lower cone 15 by an inner hexagonal socket head cap screw 44. The slips 14 are placed between the upper cone 11 and the lower cone 15, the slips 14 are machined with spring grooves, and the springs 47 are placed in the spring grooves. The upper slip sleeve 9 is connected with the lower slip sleeve 12 through threads, the upper slip sleeve and the lower slip sleeve are fixed on a transmission joint 42 through release pins 39-2, the lower slip sleeve 12 and the guide sleeve 16 are of an integral structure formed by welding two parts, four rectangular holes are uniformly distributed in the circumferential direction on the integral structure, each rectangular hole corresponds to each slip 14, a pin groove J is processed in the guide sleeve 16, a pin groove is processed in the lower cone 15, a limit pin 45 connected to the lower cone 15 is located in the pin groove J, and the inner end of a guide pin 46 connected to the guide sleeve 16 is located in the pin groove of the lower cone 15. Referring to fig. 2 and 4, the friction body 18 is provided with friction block grooves, clamping block grooves and annular grooves K, the friction block grooves and the clamping block grooves are uniformly distributed and spaced along the circumferential direction, the friction block 19 is placed in the friction block grooves, the spring 59 is placed at the lower part of the friction block grooves, the clamping block 43 is placed in the clamping block grooves, the spring 57 is placed at the lower part of the clamping block grooves, and the friction block 19 and the clamping block 43 are fixed on the friction body 18 through the guide sleeve 16 and the retaining ring 20. The friction body 18 is connected to the guide sleeve 16 by means of a thread. Referring to fig. 3, the lower driving shaft 25 is screw-coupled to the lower end of the middle driving shaft 21, and a nail groove L is formed at the lower portion thereof. The lower central tube 24 is provided with a pin groove M, a pin groove N and a locking ring groove, and the lower central tube 24 is arranged on the outer side of the lower transmission shaft 25. The connecting joint 22 is connected with the lower end of the upper central tube 10 through threads and clamped on a lock ring groove of the lower central tube 24 through the assembled lower snap ring 26, the connecting joint 22 is fixed on the lower central tube 24 through a lower unsealing pin 40, and meanwhile, the inner end of a lower guide pin 41 assembled on the connecting joint 22 is positioned in a pin groove M of the lower central tube 24. The upper pressing cap 27 is connected with the outer sleeve 23 through a thread and is placed outside the connecting joint 22, and the lower part is sequentially provided with an edge rubber cylinder 28, a gasket 29, a middle rubber cylinder 30 and a release ring 31 (in a prior art structure). The stationary piston 32 is threadably connected to the lower center tube 24 and is connected to the release ring 31 by a release pin 39-3. The snap spring 34 is disposed in a mounting groove of the fixed piston 32, and the snap spring 34 is an elastic steel ring having an opening in the circumferential direction and having an anti-reverse oblique tooth on the outer circumference thereof. The inner cylinder of the release cylinder 33 is provided with anti-falling inclined teeth P in the direction opposite to that of the anti-falling inclined teeth of the clamp spring 34, the release cylinder 33 moves upwards when the setting of the tool is finished, the inner and outer anti-falling inclined teeth are occluded after the setting is finished, the release cylinder 33 is clamped, the rubber barrel is compressed, and the downward movement cannot be recovered, so that the setting of the tool is finished. Namely, the clamp spring 34 is clamped at the anti-falling oblique teeth P of the release cylinder 33.

The release cylinder 33 is disposed outside the fixed piston 32. The guide ring 36 is fixed to the pin grooves N and L of the lower center tube 24 and the lower driving shaft 25 by driving pins 38. The lower mandrel 35 is placed outside the release cylinder 33. The lower joint 37 is connected to the lower center tube 24 and the lower cylinder 35 by a screw. The structure forms a fracturing anti-top anti-falling blowout prevention tool.

The working principle is as follows:

the utility model discloses the mode that the field installation used as follows:

confirm this instrument before going into the well and connect correctly, the utility model discloses oil pipe and instrument for the fracturing are connected on upper portion, sub-unit connection float switch, three piece at least tail pipes are connected to float switch bottom. When the well is lowered, the float switch is not poked, and is in a sealing state, so that the blowout prevention effect is achieved.

1) The steel ball 56 protects the deblocking pin 61 from stress during the process of lowering the well, so that the tool cannot be released in advance during the process of lowering the well. The key 6 is not in the keyway D of the drive sleeve 7 and any rotation of the tool will not prematurely release the tool.

2) The tool is placed to a designated position along with a fracturing string (a special fracturing string for an oil field) and then is subjected to fracturing operation, the fracturing tool is released (the fracturing tool is other existing special tools meeting the requirements of fracturing technology and is other existing special tools going into a well along with the fracturing string and the tool), meanwhile, liquid enters an inflow liquid inlet hole A through an upper connector 1, exerts pressure on a part release sleeve 5, cuts off a release pin 39-1, and the release sleeve 5 moves downwards under the action of a thrust spring 51 to drive a key 6 to enter a key groove D of a transmission sleeve 7. And the fracturing anti-top anti-falling blowout prevention tool is prepared before being released.

3) After fracturing operation is completed, sand setting and shaking are carried out, and the steel ball 56 protects the deblocking pin 61 from being stressed, so that the tool cannot be released in advance and lost in the process of going into the well.

4) After the sand removal is finished, the tool is lifted up to a perforation well section or a fracturing well section, the upper joint 1 rotates in a forward mode to drive the upper transmission shaft 2 to drive the transmission sleeve 7 to rotate through the key 6, the transmission sleeve 7 drives the transmission joint 8 to drive the transmission joint 42 to rotate through threads, the upper central tube 10 is driven to rotate through the upper guide pin 58, at the moment, the friction block 19 is clamped on the sleeve and cannot rotate under the action of the spring 57, so that the friction body 18, the guide sleeve 16, the lower cone 15, the slips 14, the lower slip sleeve 12 and the upper slip sleeve 9 cannot rotate, the transmission joint 42 generates torsion with the upper slip sleeve 9 to shear the release pin 39-2 when rotating, the lower cone 15 is driven to move upwards through the trapezoidal threads I when the upper central tube 10 rotates, the upper cone 11 cannot move upwards due to the action of the upper snap ring 13, so that the slips 14 in the middle are jacked upwards along the inclination, biting on the wall of the cannula to complete anchoring. The positioning block 17 limits the thread length at the lower part of the trapezoidal thread I to ensure that the expansion height of the slips 14 is fixed. The slips are fully anchored to the casing by rotating the slips forward 10-12 turns (to ensure that the tubing thread connection is complete).

5) After the tool is anchored, the friction body 18 moves upwards, the annular groove K moves right above the steel ball 56, the steel ball 56 of the lifting pipe column moves out of the ball groove G under the action of force, the unsealing pin 61 is sheared under the action of force, the transmission pin 38 continues to move upwards under the action of force, the transmission pin 38 drives the guide ring 36 and the release cylinder 33 to move upwards, the release cylinder 33 applies thrust to the release ring 31 to shear the release pin 39-3, and therefore the side rubber cylinder 28, the gasket 29 and the middle rubber cylinder 30 are pushed to move upwards, the upper pressing cap 27 cannot move upwards under the action of the lower snap ring 26, the side rubber cylinder 28 and the middle rubber cylinder 30 are forced to be compressed, setting is completed, and blowout prevention of the casing is achieved. The release cylinder 33 is provided with an anti-falling oblique tooth P and is matched with the clamp spring 34 when moving upwards, so that the release cylinder 33 cannot move downwards, and the rubber cylinder cannot retract after being seated.

6) After the tool is sealed, the pipe column is lifted continuously, the transmission pin 38 is sheared by stress, the pipe column is lifted continuously, the upper joint 1 drives the upper transmission shaft 2, then the middle transmission shaft 21 and then the lower transmission shaft 25 to move upwards along with the pipe, so that the pipe column is separated from the main tool, and releasing is finished.

7) The pump is lowered to start production. The original fracturing string is taken out, the production string is put in, the tail end of the production string is connected with a special poking rod of a float switch, the poking rod pokes the float switch when the string is put down to a specified position, and liquid flows out from the lower part to start normal production.

8) Fishing: when the fracturing anti-top anti-drop blowout prevention tool needs to be unsealed out due to other measures or reasons of the oil well, the existing special fishing tool is put in, the fishing tool is matched with the fishing thread C of the fishing joint 4, the pipe column fishing tool is lifted to drive the fishing joint 4 to move upwards, then the transmission sleeve 7, the transmission joint 8 and the transmission joint 42 are sequentially driven to move upwards, because the upper cone 11 is fixed on the upper central tube 10 and can not move under the action of the upper snap ring 13, the deblocking pin 48 is cut off when the transmission joint 42 moves upwards, the upper snap ring 13 is exposed by continuously moving upwards, the upper cone 11 is separated from the upper central tube 10, the transmission joint 42 is continuously lifted upwards to drive the upper slip sleeve 9 and the lower slip sleeve 12 to move upwards, since the lower cone 15 is fixed on the upper central tube 10, when the lower slip sleeve 12 moves upwards, the gap between the lower cone 15 and the upper cone 11 becomes larger, and the slips 14 are retracted under the action of the spring 47 to complete the anchorage release. After the tool is completely unscrewed, the tool is lifted continuously, the lower slip sleeve 12 drives the guide sleeve 16 to move upwards, so that the friction body 18, the lower cone 15 and the upper central tube 10 are driven to move upwards, the upper central tube 10 moves upwards to drive the connecting joint 22 to move upwards, the lower deblocking pin 40 is cut off, the lower snap ring 26 is exposed, the upper pressing cap 27 is separated from the lower central tube 24, the tool is lifted continuously to drive the outer sleeve 23 and the upper pressing cap 27 to move upwards, the direct distance between the upper pressing cap 27 and the release ring 31 is increased, and the rubber cylinder is shrunk to complete rubber cylinder deblocking. Continuing to lift, the lower pipe 24 and lower coupling 37 are moved upwardly by the lower guide pin 41, thereby allowing the entire tool to be played out to complete the fishing.

Claims

1. The utility model provides a top instrument is prevented in fracturing, is including the top connection, goes up the transmission shaft, fixed cover, release cover, salvage joint, transmission cover, well transmission shaft, lower transmission shaft, goes up the center tube, lower center tube, goes up the cone, cone down, slips go up the pressure cap, limit packing element, gasket, well packing element, release ring, lower working barrel, characterized by: the upper transmission shaft is provided with a liquid inlet hole and a key groove, and the fixed sleeve is connected with the release sleeve through a release pin; the thrust spring is arranged outside the fixed sleeve; the key is connected to the release sleeve and placed in the key groove of the upper transmission shaft; the lower part of the middle transmission shaft is provided with a ball groove; the upper central pipe is provided with a guide pin groove, a lock ring groove and a trapezoidal thread, the lower part of the upper central pipe is provided with a ball hole, the ball hole corresponds to the ball groove at the lower part of the middle transmission shaft, and a steel ball is placed in the ball hole and fixed on the outer side of the middle transmission shaft through the steel ball; a guide pin is assembled on the transmission joint and is connected with a pin shaft groove of the upper central tube in a sliding manner through the guide pin; the upper cone is fixed on the transmission joint through a deblocking pin, and the lower part of the upper cone is fixed on a lock ring groove of the upper central tube by using an upper snap ring; the lower cone is provided with trapezoidal threads which are matched and fixed with the trapezoidal threads of the upper central tube; the lower slip sleeve and the guide sleeve are of an integral structure formed by welding two parts into a whole, four rectangular holes which are uniformly distributed in the circumferential direction are formed in the integral structure, each rectangular hole corresponds to each slip, a pin groove is formed in the guide sleeve, a pin groove is formed in the lower cone, a limiting pin connected to the lower cone is located in the pin groove, and the inner end of the guide pin connected to the guide sleeve is located in the pin groove of the lower cone; the friction body is connected with the guide sleeve through threads; a nail groove is processed at the lower part of the lower transmission shaft, and a pin groove and a locking ring groove are arranged on the lower central pipe; the connecting joint is connected with the lower end of the upper central pipe through threads and clamped on a lock ring groove of the lower central pipe through an assembled lower clamp ring, the connecting joint is fixed on the lower central pipe through a lower deblocking pin, and meanwhile, the inner end of a lower guide pin assembled on the connecting joint is positioned in a pin groove of the lower central pipe; the fixed piston is connected with the lower central tube through threads and is connected to the release ring through a release pin; the clamp spring is arranged in an installation groove on the fixed piston, the clamp spring is an elastic steel ring with an opening in the circumferential direction, and the outer circumference of the clamp spring is provided with an anti-falling oblique tooth; the inner cylinder of the release cylinder is provided with anti-falling inclined teeth opposite to the anti-falling inclined teeth of the clamp spring in direction; the inner end of a transmission pin assembled on the guide ring is positioned in a pin groove of the lower central tube and a pin groove of the lower transmission shaft.

2. The fracturing jack tool of claim 1, wherein: the friction body is provided with a friction block groove, a clamping block groove and an annular groove, the friction block groove and the clamping block groove are uniformly distributed and spaced along the circumferential direction, the friction block is placed in the friction block groove, the spring is placed at the lower part of the friction block groove, the clamping block is placed in the clamping block groove, and the spring is placed at the lower part of the clamping block groove.