CN212985194U - Oil gas well cable control safety release device - Google Patents

Abstract

The utility model relates to the technical field of unconventional oil and gas well cable conveying bridge plugs, perforation and well logging, in particular to an oil and gas well cable control safety release device; the fishing device comprises an upper joint, a fishing cap and a lower joint, wherein the fishing cap is in threaded connection with the lower joint; the cable head weakness can be replaced by the cable control safety release device, and the fishing cap is exposed after release, so that subsequent coiled tubing fishing is facilitated. And the method has the characteristics of high safety and reliability, easy realization and low manufacturing cost.

Description

Oil gas well cable control safety release device

Technical Field

The utility model relates to an unconventional oil and gas well cable transport bridging plug, perforation and well logging technical field specifically are an oil and gas well cable control safety release.

Background

The world energy landscape is changing with the rapid development of unconventional natural gas and becoming a global hotspot. Unconventional natural gas generally refers to that geological conditions and mining conditions are different from conventional natural gas, and natural gas resources with economic yield cannot be obtained by conventional mining means, and mainly comprise dense gas, coal bed gas, shale gas and the like. Through the continuous research and improvement of related technologies at home and abroad in recent years, mature and complete cable pumping bridge plug clustering perforation and staged fracturing technologies are formed, so that great release of oil gas is difficult to use in the past.

At present, hundreds of wells, thousands of bridge plugs, perforation and well logging construction tasks are completed every year in domestic unconventional oil and gas exploitation, but most of the wells are horizontal wells. The most rapid and effective conveying mode is cable conveying and hydraulic pumping, in order to protect the safety of cables, avoid the cables from breaking and falling into a well from the middle or a well head and reduce the fishing difficulty, the common method in China at present is the weak point of cable head arrangement. However, the method ensures that the cable head has low strength and is easy to break off in the pumping or perforating detonation process, at least dozens of cable breaking and breaking or pump breaking accidents occur in China every year when the cable meets the clamp and the perforating detonation, so that the construction progress is delayed, and a large amount of manpower, material resources and financial resources are invested for subsequent salvage. Therefore, a cable control safety release device is designed at the cable head, so that the physical weakness is replaced, and the strength of the cable head is improved, and the research and development application schedule is mainly provided.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that exists among the prior art, provide an oil gas well cable control safety release.

The technical scheme is as follows:

a cable control safety release device for an oil and gas well comprises an upper joint, a fishing cap and a lower joint, wherein the fishing cap is in threaded connection with the lower joint; the upper shell is sleeved with the middle joint, and the middle joint is slidably sleeved with the lower shell; the middle joint is provided with a pore passage A for communicating the upper shell and the lower shell; the electric motor is arranged in the upper shell and is connected with the firing pin through a speed reducer in a driving way; the firing pin is inserted in the pore passage A in a sliding manner and is linked with the thimble; the root part of the release claw is fixedly arranged on the middle joint, and the claw part is clamped on the lower joint; the locking ring is slidably sleeved on the claw part and is in locking fit with the claw part; the locking ring fixing pin is fixedly connected with the locking ring; the thimble is linked with the locking ring fixing pin.

Further, still be equipped with the control circuit module in the upper shell, electric motor passes through the control circuit module and is connected with last single core stopper, the control circuit module includes telemetering measurement communication circuit, electric motor drive circuit and voltage protection circuit. Still include and salvage the cap, release claw centre gripping in salvaging the cap, salvage cap threaded connection in lower clutch. Still include the snubber block, the snubber block sets up between control circuit module and last casing inner wall.

Furthermore, the electric motor damping device further comprises a damping body, and the damping body is wrapped on the electric motor. And a sealing ring is arranged between the upper shell and the middle joint. An internal thread is arranged at one end of the lower connector, an external thread is arranged at one end of the fishing cap, and the fishing cap is in threaded connection with the lower connector. A pore passage B is formed in the fishing cap, and at least two axial through grooves are axially formed at the lower end of the fishing cap; the locking fixing pin penetrates through the axial barrel groove, and two ends of the locking fixing pin are fixedly connected with the locking ring; the thimble slides and is inserted in the pore passage B, and the lower end of the thimble is arranged on the locking and fixing pin. The releasing claws are provided with a plurality of claws in pairs. The number of the claws is four.

The utility model has the advantages that:

the cable head weakness can be replaced by the cable control safety release device, and the fishing cap is exposed after release, so that subsequent coiled tubing fishing is facilitated. And the method has the characteristics of high safety and reliability, easy realization and low manufacturing cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure: the device comprises an upper connector 1, a control circuit module 2, an electric motor 3, a speed reducer 4, an intermediate connector 5, a release claw 6, an ejector pin 7, a locking ring 8, a lower single core plug 9, an upper single core plug 10, a shock absorption block 11, an upper shell 12, a shock absorption assembly 13, a striker 14, a lower shell 15, a fishing cap assembly 16, a locking ring fixing pin 17, an anti-rotation jackscrew 18, a lower connector 19, a hole A20 and a hole B21.

Detailed Description

Referring to fig. 1, the oil and gas well cable control safety release device is composed of an upper connector 1, a control circuit module 2, an electric motor 3, a speed reducer 4, an intermediate connector 5, a release claw 6, an ejector pin 7, a locking ring 8, a lower single core plug 9, an upper single core plug 10, a shock absorption block 11, an upper shell 12, a shock absorption assembly 13, a firing pin 14, a lower shell 15, a fishing cap assembly 16, a locking ring fixing pin 17, an anti-rotation jackscrew 18 and a lower connector 19.

The upper shell, the middle joint, the lower shell and the lower joint are cylindrical short joints.

The upper end of the upper shell is provided with an upper connector, an upper single core plug mounting hole is formed in the upper connector, the upper single core plug is inserted into the mounting hole, and a space for installing electrical components is arranged below the upper connector; the lower part of the upper shell is sleeved with an intermediate joint, and a pore passage A which axially penetrates through the intermediate joint is arranged in the middle of the intermediate joint and is used for inserting a firing pin; a lower shell is sleeved below the middle joint in a sliding manner, and a space for installing components such as an ejector pin, a fishing cap and the like is formed inside the lower shell; the lower part of the lower shell is sleeved with a lower joint.

The upper end of the upper connector 1 is provided with external threads which are directly connected with a cable head component, and the inner side of the upper connector is provided with an upper single-core plug 10 which is used for isolating, sealing and connecting wires. The upper end integrated control circuit module 2 on the inner side of the upper shell 12 comprises a telemetering communication circuit, an electric motor driving circuit and a voltage protection circuit, the electric motor 3 and the speed reducer 4 are fixed on the lower end of the inner side, and the outer side is protected by a damping block 11 and a damping assembly 13.

The middle joint 5 is connected with the upper shell 12 and the lower shell 15, the firing pin 14 is arranged in the middle joint 5, and the inner side of the lower end of the middle joint 5 is connected with the releasing claw 6.

The striker 14 is provided with female threads on the inner side of the upper end, a pin key on the outer side, a sealing ring in the middle and a non-rotating lower end in the lower shell 15, and is arranged in the pore passage A.

The speed reducer 4 is a market finished product, transmission rods are arranged at the upper part and the lower part of the speed reducer, and the upper end of the speed reducer is connected with an electric motor; the outer side of the lower end rotating rod is provided with a male thread which is connected in a female thread at the inner side of the upper end of the firing pin.

The release claws 6 are arranged as four individual claws per revolution.

And the inner side of the lower shell 15 is provided with an ejector pin 7, a locking ring 8, a fishing cap assembly 16 and a locking ring fixing pin 17.

The lower end of the fishing cap component 16 is provided with external threads and is connected with a lower connector 19, the upper end of the fishing cap component is provided with a fishing cap, the inner side of the lower end is provided with a lower single-core plug 9, and the outer side of the lower end is provided with an anti-rotation jackscrew 18.

The fishing cap component is of a T-shaped structure and made of high-strength alloy materials, and a pore passage B is formed inside the fishing cap component.

The fishing cap assembly 16 is reliably connected with the intermediate joint 5 through the release claw 6, the locking ring 8 and the locking ring fixing pin 17, and the locking ring 8 is connected with the locking ring fixing pin 17.

The inner side of the upper end of the lower connector 19 is provided with an internal thread which is connected with the fishing cap component 16, and the outer side of the lower end of the lower connector is provided with an external thread which is directly connected with an instrument string below.

The thimble assembly 7 is provided with an inner needle and an outer sleeve which are connected together in a variable manner, and the outer sleeve is T-shaped.

The working principle of the invention is as follows: when the device needs to be released, the control circuit module 2 is started through a ground control instrument, the electric motor 3 is driven to work, the striker 14 is pushed out downwards through the speed reducer 4, the striker 7 moves downwards to push against the locking ring fixing pin 17, the locking ring 8 is driven to move downwards, the release claw 6 eliminates the constraint, the inner pin of the ejector pin moves downwards at the same time, the outer sleeve is driven to move downwards, the release claw 6 starts to open outwards, the fishing cap on the fishing cap assembly 16 is released, the cable is lifted to apply force to the device, the lower shell 15 is separated from the fishing cap assembly 16, the fishing cap assembly 16 is exposed, and the lower connector 19 and the instrument below are strung in the well, so that the subsequent coiled tubing fishing operation is facilitated.

Claims (10)

1. A cable control safety release device for an oil and gas well comprises an upper joint, a fishing cap and a lower joint, wherein the fishing cap is in threaded connection with the lower joint; the upper shell is sleeved with the middle joint, and the middle joint is slidably sleeved with the lower shell; the middle joint is provided with a pore passage A for communicating the upper shell and the lower shell; the electric motor is arranged in the upper shell and is connected with the firing pin through a speed reducer in a driving way; the firing pin is inserted in the pore passage A in a sliding manner and is linked with the thimble; the root part of the release claw is fixedly arranged on the middle joint, and the claw part is clamped on the lower joint; the locking ring is slidably sleeved on the claw part and is in locking fit with the claw part; the locking ring fixing pin is fixedly connected with the locking ring; the thimble is linked with the locking ring fixing pin.

2. The oil and gas well cable control safety release device of claim 1, wherein a control circuit module is further arranged in the upper shell, the electric motor is connected with the upper single core plug through the control circuit module, and the control circuit module comprises a telemetering communication circuit, an electric motor driving circuit and a voltage protection circuit.

3. The oil and gas well cable control safety release device of claim 2, further comprising a fishing cap, wherein the release claw is clamped on the fishing cap, and the fishing cap is in threaded connection with the lower connector.

4. The oil and gas well cable control safety release device of claim 2, further comprising a shock block disposed between the control circuit module and the inner wall of the upper housing.

5. The oil and gas well cable controlled safety release device of any one of claims 1 to 4, further comprising a shock absorber, wherein the shock absorber is wrapped around the electric motor.

6. An oil and gas well cable controlled safety release device as claimed in any one of claims 1 to 4, wherein a sealing ring is provided between the upper housing and the intermediate connector.

7. The oil and gas well cable control safety release device of any one of claims 1 to 4, wherein the lower connector is internally threaded at one end, the fishing cap is externally threaded at one end, and the fishing cap is in threaded connection with the lower connector.

8. The oil and gas well cable control safety release device according to any one of claims 1 to 4, wherein a pore passage B is formed in the fishing cap, and at least two axial through grooves are axially formed at the lower end of the fishing cap; the locking fixing pin penetrates through the axial barrel groove, and two ends of the locking fixing pin are fixedly connected with the locking ring; the thimble slides and is inserted in the pore passage B, and the lower end of the thimble is arranged on the locking and fixing pin.

9. An oil and gas well cable control safety release device as claimed in any one of claims 1 to 4, wherein the release pawl is provided in pairs with a plurality of pawls.

10. An oil and gas well cable controlled safety release device as claimed in claim 9, wherein the number of claws is four.

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