CN207111058U

CN207111058U - A kind of locking formula downhole choke instrument of box cupling for singly proposing unfreezing

Info

Publication number: CN207111058U
Application number: CN201721067820.8U
Authority: CN
Inventors: 徐建宁; 郑舜泽
Original assignee: Xian Shiyou University
Current assignee: Xian Shiyou University
Priority date: 2017-08-24
Filing date: 2017-08-24
Publication date: 2018-03-16
Anticipated expiration: 2027-08-24

Abstract

A kind of locking formula downhole choke instrument of box cupling for singly proposing unfreezing, upper inner tube both ends are connected with salvaging pipe, cone pipe, salvage and is socketed with catch jacket by position-limitting pin outside pipe, have four claws to hang on claw link inside catch jacket respectively by screw thread；Upper inner tube is connected by cutting pin two with lower inner tube, when locking, claw, which opens, to be engaging in box cupling and leans against on cone pipe, locking effect " will not kill " well oil pipe, the limiting tooth one of catch jacket lower end and the limiting tooth two of upper piston upper end are ratcheting, ensure that flow controller will not glide, cone pipe is connected with lower inner tube by pin, above carry and cut the pin and can remove cone pipe and reclaim claw and complete to salvage, it is easy to operate need not under pound the operation of flow controller, fishing success ratio is high, can effectively avoid flow controller salvage failure and caused by down-hole accident.

Description

A kind of locking formula downhole choke instrument of box cupling for singly proposing unfreezing

Technical field

Oil-gas field development technical field is the utility model is related to, more particularly to a kind of locking formula underground of box cupling for singly proposing unfreezing Throttling instrument.

Background technology

Large area uses throttling technology under the natural gas well, and locking mechanism is card used by wherein most flow controller Tile structure, operation is hit under needing during the structure fishing, and low success rate of defect be present.The structure is jacked up by the conical surface Slips realizes that flow controller is engaging in oil pipe, prevents flow controller up, but does not prevent flow controller descending, and locking tension meeting There is " killing " oil pipe, cause to salvage down-hole accident that is difficult or even can not salvaging.

The content of the invention

The defects of in order to overcome above-mentioned prior art, the purpose of this utility model are to provide a kind of box cupling for singly proposing unfreezing Locking formula downhole choke instrument, it is easy to operate need not under pound the operation of flow controller, its fishing success ratio is high, can effectively avoid saving Down-hole accident caused by stream device salvaging unsuccessfully.

In order to achieve the above object, the technical solution of the utility model is：

A kind of locking formula downhole choke instrument of box cupling for singly proposing unfreezing, including decentralization first 1, decentralization first 1 is by cutting pin One 2 are connected with upper inner tube 3, and the upper both ends of inner tube 3 are connected with salvaging pipe 4, cone pipe 10 respectively by screw thread, are salvaged and are passed through outside pipe 4 Position-limitting pin 5b is socketed with catch jacket 5, has four claws 6 to hang on claw link 5a inside catch jacket 5, in the lower end of catch jacket 5 Side is provided with limiting tooth 1；Upper inner tube 3 is connected by cutting pin 29 with lower inner tube 7, and the lower end of lower inner tube 7 is spacing embedded with four Block 7a and the end of lower inner tube 7 are provided with flow nipple 21, are threadedly coupled upper piston 13 in lower inner tube 7, upper piston 13 is provided with limiting tooth 2 11 and lower end be provided with sealing rubber ring 14, the outer surface of upper piston 13 is socketed with upper exterior tube 15, is threaded with upper exterior tube 15 Spacing ring 12, the upper end of lower end vulcanization fixing seal packing element 17 of upper exterior tube 15, the vulcanization of the lower end of cartridge 17 are fixed on rubber top On ring 19, the lower end of rubber apical ring 19 is threadedly coupled with lower outer pipe 20, and lower outer pipe 20 is threadedly coupled with the lower end of lower piston 18, lower piston 18 are connected with lower inner tube 7 by cutting pin 3 16, and lower outer pipe 20 is connected by screw thread with sand control device 22.

The beneficial effects of the utility model：

(1) when locking, the unblock of catch jacket 5 is glided, and claw 6 is opened by the conical surface top of cone pipe 10 and is engaging in box cupling, and its is locking Effect " will not kill " well oil pipe；

(2) lower end of catch jacket 5 is provided with limiting tooth 1, and the limiting tooth 2 11 after locking and on upper piston 13 is ratcheting will not Slide again, ensure that the utility model will not glide；

(3) cone pipe 10 is connected with lower inner tube 20 by pin, above carry cut the cutting pin 3 16 can remove cone Pipe reclaims claw and completes to salvage.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the enlarged diagram of limiting tooth.

Fig. 3 is working state schematic representation, and wherein Fig. 3 a are decentralization state diagram of the present utility model, and Fig. 3 b are the utility model Initial sealing state diagram is completed, Fig. 3 c propose state diagram for of the present utility model salvage.

Embodiment

The utility model is described in detail below in conjunction with the accompanying drawings.

Reference picture 1, a kind of locking formula downhole choke instrument of box cupling for singly proposing unfreezing, including decentralization first 1, decentralization first 1 pass through Cut pin 1 to be connected with upper inner tube 3, the upper both ends of inner tube 3 are connected with salvaging pipe 4, cone pipe 10 respectively by screw thread, salvage pipe Catch jacket 5 is socketed with by position-limitting pin 5b outside 4, there are four claws 6 to hang on claw link 5a inside catch jacket 5, reference picture 2, the lower end inside of catch jacket 5 is provided with limiting tooth 1；Upper inner tube 3 is connected by cutting pin 29 with lower inner tube 7, lower inner tube 7 Lower end is provided with flow nipple 21 embedded with four limited block 7a and the end of lower inner tube 7, and upper piston 13, reference are threadedly coupled in lower inner tube 7 Fig. 2, upper piston 13 is provided with limiting tooth 2 11 and lower end is provided with sealing rubber ring 14, and the outer surface of upper piston 13 is socketed with upper exterior tube 15, restraining position ring block 12, the upper end of lower end vulcanization fixing seal packing element 17 of upper exterior tube 15, cartridge are threadedly coupled on upper exterior tube 15 The vulcanization of 17 lower ends is fixed on rubber apical ring 19, and the lower end of rubber apical ring 19 is threadedly coupled with lower outer pipe 20, lower outer pipe 20 and lower work The threaded connection of 18 lower ends is filled in, lower piston 18 is connected with lower inner tube 7 by cutting pin 3 16, and lower outer pipe 20 passes through screw thread and sand control Device 22 connects.

Operation principle of the present utility model：

First, it is setting：Closing well, preventer is installed, is sequentially connected steel wire rope+bumper jar+decentralization head+the utility model flow controller In lower going-into-well, the utility model flow controller state as shown in Figure 3 a, reach precalculated position after, jerk, spacing the utility model section Flow pin 5b in device lower going-into-well to cut, catch jacket 5 relies on self gravitation slide downward with claw 6, and claw 6 is by cone pipe 3 The conical surface jack up, above carry steel wire, claw 6, which is caught in box cupling, to be continued above to carry, and catch jacket 5 continues traveling downwardly, the limiting tooth 1 of its lower end with Limiting tooth two on upper piston 13 is engaged, stationary jaw set, and now, claw 6 opens and is fixed on envoy on cone pipe 10 completely It is no longer up to flow device.Continue up and carry, cut pin 3 16, upper piston 13 and lower piston are made in the presence of down-hole pressure 18 relative motions, lower piston 18 drive lower outer pipe 20, the up crush seal packing element 17 of rubber apical ring 19 to be attached on tubing wall, complete Just sealing, the utility model state as shown in Figure 3 b, continue up and carry cutting cutting pin 1, propose that decentralization first 1 is completed to lose Hand, opening well and making production, extruding completion sealing is continued with the cartridge 17 of going deep into of production.

2nd, deblocking is salvaged：Closing well, preventer is installed, is sequentially connected in steel wire rope+bumper jar+fishing tool lower going-into-well and grabs The fishing head on pipe 4 is firmly salvaged, is carried upwards, pin 2 19 is cut, makes inner tube 3, cone pipe 10 up, claw 6 is removed Except support, it is recovered under the reaction force of box cupling in the utility model, continues above to carry, work of the cartridge 17 in frictional force It is descending with lower promotion rubber apical ring 19, lower outer pipe 20, sand control device 22, make upper and lower pressure balance, cartridge 17 unseals, this practicality New state such as Fig. 3 c, you can smoothly propose the utility model.

Claims

1. a kind of locking formula downhole choke instrument of box cupling for singly proposing unfreezing, it is characterised in that including decentralization head (1), decentralization head (1) It is connected by cutting pin one (2) with upper inner tube (3), upper inner tube (3) both ends are by screw thread respectively with salvaging pipe (4), cone pipe (10) connect, salvage pipe (4) and catch jacket (5) is socketed with by position-limitting pin (5b) outside, there are four claws inside catch jacket (5) (6) hang on claw link (5a), catch jacket (5) lower end inside is provided with limiting tooth one (8)；Upper inner tube (3) is by cutting pin Two (9) are connected with lower inner tube (7), and the lower end of lower inner tube (7) is provided with throttling embedded with four limited blocks (7a) and lower inner tube (7) end Mouth (21), is threadedly coupled upper piston (13) on lower inner tube (7), upper piston (13) is provided with limiting tooth two (11) and lower end be provided with it is close Rubber ring (14) is sealed, upper piston (13) outer surface is socketed with upper exterior tube (15), and upper exterior tube is threadedly coupled restraining position ring block on (15) (12), lower end vulcanization fixing seal packing element (17) upper end of upper exterior tube (15), the vulcanization of cartridge (17) lower end are fixed on rubber On apical ring (19), rubber apical ring (19) lower end is threadedly coupled with lower outer pipe (20), lower outer pipe (20) and lower piston (18) lower end spiral shell Line is connected, and lower piston (18) is connected with lower inner tube 7 by cutting pin three (16), and lower outer pipe (20) passes through screw thread and sand control device (22) connect.