CN116181288A

CN116181288A - Electric perforating tool for oil-gas well casing

Info

Publication number: CN116181288A
Application number: CN202310298694.0A
Authority: CN
Inventors: 丁宇; 陈小东; 刘伟
Original assignee: Sichuan Zpec Kaseum Petroleum Technology Co ltd
Current assignee: Sichuan Zpec Kaseum Petroleum Technology Co ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-05-30

Abstract

The utility model provides an electronic drilling tool of oil gas well sleeve pipe, includes extension joint assembly, piston module, the module of punching and check valve module that connects gradually, the both ends of the module of punching are threaded connection. The punching tool has the advantages that the structure is simple, the operation is convenient, the sleeve is not damaged when the oil pipe is perforated, the potential safety hazards of gunpowder punching and mechanical punching are eliminated, and the problems that the randomness of holes is large, the shape of the holes is irregular and the sleeve wall is easy to shoot through due to the fact that the holes are formed in the traditional punching are solved.

Description

Electric perforating tool for oil-gas well casing

Technical Field

The invention relates to the technical field of downhole tools for oil and gas well development, in particular to an electric drilling tool for oil and gas well casing.

Background

In the exploitation of oil and natural gas, in order to ensure that circulation is established between an oil casing and an annulus in the downhole operation process of an oil and gas well, holes are required to be punched in the oil casing. Traditional gunpowder punches and machinery punches, has certain dangerous hidden danger to the cost is higher.

In the construction operation of the perforating gun, the perforating gun is lowered to a target layer needing perforation through a cable or a continuous oil pipe, a detonator is detonated through the cable or a pressure detonator connected with the continuous oil pipe is detonated through the continuous oil pipe in a pressurizing mode, and then the detonating cord and the perforating charges in the charge holder are detonated, so that metal jet flow of the perforating charges penetrates through outer blind holes corresponding to the perforating charges on a gun body and a central pipe of the oil pipe and a packer, and the oil pipe is communicated with a casing. However, the holes formed by the perforating gun are very random, irregular in shape and the metal jets of the charges are highly likely to fire through the casing wall. The oil and gas well operation requires that stable holes be formed and that the casing is not damaged under the condition of perforating the oil pipe.

Disclosure of Invention

The invention aims to solve the problems and provides an electric perforating tool based on an oil and gas well casing.

The utility model provides an electronic drilling tool of oil gas well sleeve pipe, includes extension joint assembly, piston module, the module of punching and check valve module that connects gradually, the both ends of the module of punching are threaded connection.

Further, the piston module comprises a hydraulic cylinder and a main piston, a central pull rod and a hydraulic bin sealing gland are arranged in the hydraulic cylinder, one end of the central pull rod is inserted into the extension joint assembly, the other end of the central pull rod is connected with the main piston, a central oil pipe which is communicated with the hydraulic cylinder and the punching module is arranged on the main piston, the hydraulic bin sealing gland is sleeved on one end, close to the extension joint assembly, of the central pull rod, and the outer wall of the hydraulic bin sealing gland is fixedly connected with the inner wall of the hydraulic cylinder.

Further, the module of punching includes urceolus and the piston subassembly that punches the inside of urceolus is equipped with the hydraulic chamber, hydraulic chamber and central oil pipe intercommunication are equipped with the mounting groove on the side of urceolus that punches, the bottom and the hydraulic chamber intercommunication of mounting groove, piston subassembly swing joint that punches is installed in the mounting groove, and piston subassembly that punches includes from interior to the outside the piston that punches that sets gradually, base and the drift that punches, the bottom of drift that punches is connected with the base that punches through the spring pin.

Further, an emergency release shear ring is mounted on the piston module.

Further, a pressure relief shear disc is mounted on the end of the check valve module remote from the perforation module.

The invention has the beneficial effects that: the punching tool has the advantages that the structure is simple, the operation is convenient, the sleeve is not damaged when the oil pipe is perforated, the potential safety hazards of gunpowder punching and mechanical punching are eliminated, and the problems that the randomness of holes is large, the shape of the holes is irregular and the sleeve wall is easy to shoot through due to the fact that the holes are formed in the traditional punching are solved.

Drawings

FIG. 1 is an exploded view of the structure of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a cross-sectional view of a perforation module in accordance with the present invention.

In the example drawings: 1-extension joint assembly, 2-piston module, 201-hydraulic cylinder, 202-master piston, 203-center pull rod, 204-hydraulic bin gland, 205-center oil pipe, 3-punching module, 301-punching outer cylinder, 302-hydraulic chamber, 303-punching piston, 304-punching base, 305-punching punch, 306-spring pin, 4-check valve module, 5-emergency release shear ring, 6-pressure release shear disc.

Detailed Description

For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.

Example 1

As shown in fig. 1-3, the invention provides an electric perforating tool for oil and gas well casing, which comprises an extension joint assembly 1, a piston module 2, a perforating module 3 and a check valve module 4 which are sequentially connected, wherein two ends of the perforating module 3 are in threaded connection.

In this embodiment, the piston module 2 includes a hydraulic cylinder 201 and a main piston 202, a central pull rod 203 and a hydraulic bin sealing gland 204 are disposed in the hydraulic cylinder 201, one end of the central pull rod 203 is inserted into the extension joint assembly 1, the other end is connected with the main piston 202, a central oil pipe 205 communicating the hydraulic cylinder 201 and the punching module 3 is disposed on the main piston 202, the hydraulic bin sealing gland 204 is sleeved on one end of the central pull rod 203, which is close to the extension joint assembly 1, and an outer wall of the hydraulic bin sealing gland 204 is fixedly connected with an inner wall of the hydraulic cylinder 201.

In this embodiment, the punching module 3 includes a punching outer cylinder 301 and a punching piston sub-assembly, a hydraulic chamber 302 is provided in the punching outer cylinder 301, the hydraulic chamber 302 is communicated with a central oil pipe 205, a mounting groove is provided on a side surface of the punching outer cylinder 301, a bottom of the mounting groove is communicated with the hydraulic chamber 302, the punching piston sub-assembly is movably connected and mounted in the mounting groove, the punching piston sub-assembly includes a punching piston 303, a punching base 304 and a punching punch 305, which are sequentially arranged from inside to outside, and a bottom of the punching punch 301 is connected with the punching base 304 through a spring pin 306.

In this embodiment, an emergency release shear ring 5 is mounted on the piston module 2. The emergency release shear ring 5 is a weak point protection device that pulls the tool body, breaks the shear ring, and releases the tool internal pressure by a nominal pulling force when the tool fails to release the internal pressure.

In this embodiment, a pressure relief shear disc 6 is mounted on the end of the check valve module 4 remote from the perforation module 2. After the tubing is broken down, the power unit still pulls up the central pull rod 203, in order to prevent the overload from damaging the punching module 3, after a certain pressure is reached, the pressure relief shearing disc 6 is broken, the redundant pressure inside the tool is discharged into the well, and the external pressure cannot return to the inside of the tool under the action of the check valve module 4.

The working principle of the invention is as follows: the extension joint assembly 1 is fixedly connected with the shell of the pure electric unit, then a pull rod device in the power unit is connected with the central pull rod 203, after a punching command is started, the power unit pulls the central pull rod 203 upwards, because of the sealing effect of the hydraulic bin sealing gland 204 and the main piston 202, hydraulic oil in the hydraulic cylinder 201 can generate hydraulic pressure on the punching module 3 through the central oil pipe 205 in the moving process of the central pull rod 203, and as the pressure increases, the punching piston 303 moves outwards, so that the punching punch 305 contacts with the oil pipe wall, the hydraulic pressure continues to increase until enough force is generated, so that the punching punch 305 breaks through the oil pipe wall, and punching is completed. After the punching is completed, a downward pushing force is applied to the center rod 203, the main piston 202 returns to the original position, a negative pressure is generated in the hydraulic cylinder 201, the punching piston 303 is retracted to the inside of the punching tool, and the punching tool can be taken out to the ground.

The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The electric drilling tool for the oil and gas well casing is characterized by comprising an extension joint assembly (1), a piston module (2), a drilling module (3) and a check valve module (4) which are sequentially connected, wherein two ends of the drilling module (3) are in threaded connection.

2. The electric drilling tool for the oil and gas well casing according to claim 1, wherein the piston module (2) comprises a hydraulic cylinder (201) and a main piston (202), a central pull rod (203) and a hydraulic bin sealing gland (204) are arranged in the hydraulic cylinder (201), one end of the central pull rod (203) is inserted into the extension joint assembly (1), the other end of the central pull rod is connected with the main piston (202), a central oil pipe (205) which is communicated with the hydraulic cylinder (201) and the drilling module (3) is arranged on the main piston (202), the hydraulic bin sealing gland (204) is sleeved on one end, close to the extension joint assembly (1), of the central pull rod (203), and the outer wall of the hydraulic bin sealing gland (204) is fixedly connected with the inner wall of the hydraulic cylinder (201).

3. An oil and gas well casing electric perforating tool as claimed in claim 2, characterized in that the perforating module (3) comprises a perforating outer cylinder (301) and a perforating piston sub-assembly, a hydraulic chamber (302) is arranged inside the perforating outer cylinder (301), the hydraulic chamber (302) is communicated with a central oil pipe (205), a mounting groove is formed in the side face of the perforating outer cylinder (301), the bottom of the mounting groove is communicated with the hydraulic chamber (302), the perforating piston sub-assembly is movably mounted in the mounting groove, the perforating piston sub-assembly comprises a perforating piston (303), a perforating base (304) and a perforating punch (305) which are sequentially arranged from inside to outside, and the bottom of the perforating punch (301) is connected with the perforating base (304) through a spring pin (306).

4. An oil and gas well casing electric perforating tool as claimed in claim 1, characterized in that an emergency release shear ring (5) is mounted on the piston module (2).

5. An oil and gas well casing electric perforating tool as claimed in claim 1, characterized in that a pressure relief shear disc (6) is mounted on the end of the check valve module (4) remote from the perforating module (2).