Well entering circuit self-conduction device for oil and gas well perforation

Abstract

The utility model relates to a self-conduction device, in particular to a well-entering circuit self-conduction device for oil and gas well perforation, and solves the problems that an existing perforation device is in a power supply to-be-excited state before perforation operation and cannot meet certain specific process and environmental condition requirements. Comprising a joint, an upper conductive core-passing member, an elastic on-off unit and a lower conductive core-passing member. The upper conductive core-passing member and the lower conductive core-passing member have the same structure, and each of the upper conductive core-passing member and the lower conductive core-passing member comprises an insulating shell, a contact and a conductive rod. A mounting hole is formed in the position, corresponding to the gap, of the side wall of the connector in the radial direction, and the mounting hole communicates with the through hole. A mounting cavity is formed in the side, opposite to the mounting hole, of the inner wall of the connector, the mounting hole, the through hole and the mounting cavity form a mounting space, and the elastic on-off unit is arranged in the mounting space. According to the utility model, the elastic on-off unit is used for realizing an open-circuit state before reaching a target stratum and an on-state after reaching the target stratum.

Description

A self-conducting device for perforation circuit in oil and gas wells Technical Field

[0001] This utility model relates to a self-conducting device, specifically a self-conducting device for the well entry circuit in oil and gas well perforation. Background Technology

[0002] During oil and gas exploration and extraction, it is necessary to perform perforation operations on the oil and gas layers in the oil and gas wells. Generally, perforation operations involve using a perforation device to perform directional perforation on oil and gas-rich formations, allowing the oil and gas in the formations to seep into the oil and gas wells, facilitating oil and gas extraction.

[0003] Most perforation devices currently use electric actuation. Generally, before perforation operation, the control unit, power supply, and perforation device are connected in sequence to form a perforation string. The operation process is to activate the power supply and control unit at the wellhead, so that the entire perforation string is in a powered and ready-to-activate state. Then, the entire perforation string is lowered into the oil and gas well. When it reaches the target formation, the control unit controls the power supply to deliver electrical energy to the perforation device. At this time, the perforation device is activated to perform perforation operation on the target formation.

[0004] Under certain specific technological and environmental conditions, the entire perforation string cannot be switched on and put into a power-on-demand state while still on the surface to prevent control unit failure, which could lead to premature power-on and safety accidents. Therefore, the entire perforation string must remain open-circuited before being lowered into the oil and gas well, and can only be switched on upon reaching the target formation. This necessitates the development of a self-conducting circuit device that ensures the entire perforation string remains open-circuited before reaching the target formation and switched on upon arrival. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problem that existing perforation devices are in a power-on-preparation state before perforation operations, which cannot meet certain specific process and environmental requirements, and to provide a self-conducting device for the well circuit of oil and gas well perforation.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A self-conducting device for perforation circuit in oil and gas wells, characterized by:

[0008] Includes a connector, an upper conductive core component, a flexible switching unit, and a lower conductive core component;

[0009] The connector has a through hole in its center, and the upper conductive core and the lower conductive core are respectively located at the upper and lower ends of the through hole.

[0010] The upper and lower conductive core components have the same structure, both including an insulating shell, contacts, and conductive rods. The insulating shell is hollow and is located within a through hole. The contacts are fixedly located inside the insulating shell and at its outer end. The conductive rods are located inside the insulating shell and at its inner end. The contacts and corresponding conductive rods are connected by conductive springs. A gap is provided between the conductive rods of the upper and lower conductive core components. The contacts of the upper conductive core component are used to connect to the power supply unit, and the contacts of the lower conductive core component are used to connect to the perforation device.

[0011] The sidewall of the connector has a mounting hole radially corresponding to the gap position, and the mounting hole communicates with the through hole; the inner wall of the connector has a mounting cavity on the side opposite to the mounting hole, and the mounting hole, the through hole and the mounting cavity form a mounting space, and the elastic switching unit is disposed in the mounting space.

[0012] The elastic switching unit includes a blocking component, a piston, a first insulating rod, a conductive component, a second insulating rod, and a spring.

[0013] The blocking component is disposed within the mounting hole and near its outer end, with a pressure-transmitting hole at its center for connecting an external oil / gas well to the mounting hole. The piston is slidably disposed within the mounting hole, with its outer end face abutting against the inner end face of the blocking component. One end of the first insulating rod is connected to the inner end face of the piston, and the conductive component is disposed at the other end of the first insulating rod, corresponding to the gap. The spring is disposed within the mounting cavity, with one end abutting against the bottom of the cavity and the other end abutting against one end of the second insulating rod. The other end of the second insulating rod abuts against the other end of the first insulating rod and / or the conductive component, and both conductive rods abut against the outer wall of the second insulating rod. When the piston is in its initial position, both conductive rods abut against the outer wall of the second insulating rod; when the piston moves under pressure, both conductive rods abut against the outer wall of the conductive component, thereby activating the well entry circuit.

[0014] Furthermore, the piston has a stepped shaft structure, including a piston major diameter section and a piston minor diameter section coaxially connected. The outer end face of the piston major diameter section abuts against the inner end face of the blocking member. A groove is formed at the center of the end face of the piston minor diameter section, and one end of the first insulating rod is engaged in the groove.

[0015] Furthermore, the first insulating rod has a stepped shaft structure, including a large-diameter section and a small-diameter section of the first insulating rod connected coaxially, with the large-diameter section of the first insulating rod being engaged in a slot;

[0016] The conductive component is a conductive sleeve, which is fitted onto the outer wall of the small-diameter end of the first insulating rod, and the other end of the second insulating rod abuts against the end of the small-diameter section of the first insulating rod.

[0017] Furthermore, the second insulating rod has a stepped shaft structure, comprising a small-diameter section, a medium-diameter section, and a large-diameter section of the second insulating rod connected coaxially in sequence;

[0018] A limiting groove is provided at the center of the end of the small-diameter section of the first insulating rod;

[0019] The large-diameter section of the second insulating rod abuts against the other end of the spring, and the small-diameter section of the second insulating rod is located in the limiting groove and abuts against the bottom of the limiting groove;

[0020] The second insulating rod's middle diameter section includes a continuous section coaxially connected to an inclined transition section. The continuous section is connected to the large diameter section of the second insulating rod, and the inclined transition section is connected to the small diameter section of the second insulating rod. The diameter of the inclined transition section gradually increases from the continuous section to the small diameter section of the second insulating rod. The conductive rod abuts against the outer wall of the continuous section, and the outer diameter of the conductive sleeve is equal to the maximum diameter of the inclined transition section.

[0021] A limiting shoulder is formed at the connection between the small diameter section of the second insulating rod and the inclined transition section. The limiting shoulder abuts against the conductive sleeve and the small diameter section of the first insulating rod.

[0022] Furthermore, it also includes pressure caps, of which there are two and are screwed onto both ends of the through hole respectively. The pressure caps have a central hole for the contact to pass through, and the outer end of the insulating shell abuts against the inner end face of the pressure cap, while the inner end abuts against the abutting step provided on the inner wall of the through hole.

[0023] Furthermore, the blocking component is a blocking screw plug, which is screwed into the mounting hole.

[0024] Furthermore, a sealing ring is provided between the large-diameter section of the piston and the mounting hole.

[0025] Furthermore, a disassembly threaded hole is provided at the center of the outer end face of the piston's large diameter section.

[0026] Furthermore, a bracket is provided inside the insulating shell, the bracket is located between the contact and the corresponding conductive rod, and the bracket is connected to the conductive rod and the contact respectively by a conductive spring.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] (1) The self-conducting device for perforating oil and gas wells provided by this utility model achieves the following through an elastic switching unit: the device is in a disconnected state before reaching the target formation and in a connected state after reaching the target formation. When the device enters the oil and gas well, the pressure inside the oil and gas well acts on the piston through the pressure transmission hole. The piston moves towards the second insulating rod under pressure. At this time, the conductive element will slowly move between the two conductive rods and the spring will gradually compress. When the target formation is reached, the pressure pushes the conductive element to be located between the two conductive rods. At this time, both conductive rods are in contact with the outer wall of the conductive element, thereby making the entry circuit conductive and realizing the connection between the power supply unit and the perforation device.

[0029] (2) The piston of the self-conducting device for perforation circuit in oil and gas wells provided by this utility model is a stepped shaft structure. A groove is provided at the center of the small diameter section end face of the piston, and one end of the first insulating rod is engaged in the groove. In this way, although the piston and the first insulating rod are not fixedly connected, when the first insulating rod is subjected to radial force, it will not be disengaged from the piston. Moreover, this connection method makes it easier to replace a component after it is damaged.

[0030] (3) The second insulating rod of the self-conducting device for perforation circuit in oil and gas wells provided by this utility model includes a continuous section and an inclined transition section connected coaxially. When the piston is not pressed, the conductive rod abuts against the continuous section. When the piston is pressed, the conductive rod will slide towards the inclined transition section. Through the change of the diameter of the inclined transition section, the conductive spring can be compressed, which ensures the reliability of the circuit connection between the upper conductive core and the lower conductive core. The outer diameter of the conductive sleeve is equal to the maximum diameter of the inclined transition section. In this way, the conductive rod will not be obstructed when sliding towards the conductive sleeve. When the pressure is removed, the piston is reset under the action of the spring, the second insulating rod moves towards the first insulating rod, and the conductive rod slides back to the continuous section, so that the whole device can be reused.

[0031] (4) The self-conducting device for perforation circuit in oil and gas wells provided by this utility model has a disassembly threaded hole at the center of the outer end face of the piston's large diameter section. This allows the piston to be removed by screwing in a disassembly tool through the disassembly threaded hole, which is convenient and quick. Attached Figure Description

[0032] Figure 1 is a schematic diagram of the structure of an embodiment of the self-conducting device for perforation circuit in oil and gas wells of this utility model when it is in the open circuit state.

[0033] Figure 2 is a schematic diagram of the structure of this utility model embodiment in the connected state;

[0034] Figure 3 is a schematic diagram of the structure of the upper conductive core component in an embodiment of this utility model;

[0035] Figure 4 is a schematic diagram of the piston structure in an embodiment of this utility model;

[0036] Figure 5 is a schematic diagram of the structure of the first insulating rod in an embodiment of this utility model;

[0037] Figure 6 is a schematic diagram of the conductive component in an embodiment of this utility model;

[0038] Figure 7 is a schematic diagram of the structure of the second insulating rod in an embodiment of this utility model.

[0039] The annotations in the attached figures are explained as follows:

[0040] 1-Connector; 2-Upper conductive core component; 21-Insulating shell; 22-Contact; 23-Conductive rod; 24-Bracket; 3-Elastic switching unit; 31-Blocking component; 32-Piston; 321-Piston large diameter section; 3211-Disassembly threaded hole; 322-Piston small diameter section; 33-First insulating rod; 331-First insulating rod large diameter section; 332-First insulating rod small diameter section; 34-Conductive component; 35-Second insulating rod; 351-Second insulating rod small diameter section; 352-Second insulating rod medium diameter section; 3521-Continuous section; 3522-Inclined transition section; 353-Second insulating rod large diameter section; 36-Spring; 4-Lower conductive core component; 5-Pressure cap; 6-Sealing ring. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] Referring to Figures 1-7, the self-conducting device for perforation circuit in oil and gas wells according to this utility model includes a connector 1, an upper conductive core 2, an elastic switching unit 3, and a lower conductive core 4.

[0043] A through hole is provided in the center of connector 1, and the upper conductive core 2 and the lower conductive core 4 are respectively disposed at the upper and lower ends of the through hole. The upper conductive core 2 and the lower conductive core 4 have the same structure, both including an insulating shell 21, a contact 22 and a conductive rod 23. The insulating shell 21 is a hollow structure and is disposed in the through hole. The insulating shell 21 is made of engineering plastic material. An abutting step is provided on the inner wall of the through hole. The inner end of the insulating shell 21 abuts against the abutting step. Two pressure caps 5 are respectively provided at both ends of the through hole. The pressure caps 5 are screwed into the through hole. The outer end of the insulating shell 21 abuts against the inner end face of the pressure cap 5, thus fixing the position of the upper conductive core 2 and the lower conductive core 4.

[0044] As shown in Figure 3, the contact 22 is fixedly disposed inside the insulating shell 21 and located at the outer end of the insulating shell 21. The upper conductive contact 22, which passes through the core 2, needs to be connected to the power supply unit, and the lower conductive contact, which passes through the core 4, needs to be connected to the perforation device. Therefore, a central hole is provided in the center of the pressure cap 5 for the contact 22 to pass through, without hindering the connection of the contact 22. The conductive rod 22 is disposed inside the insulating shell 21 and located at the inner end of the insulating shell 21. The contact 22 is connected to the corresponding conductive rod 23 by a conductive spring. However, in this embodiment, a bracket 24 is also provided inside the insulating shell 21. The bracket 24 is located between the contact 22 and the corresponding conductive rod 23, and the bracket 24 is connected to the conductive rod 23 and the contact 22 by conductive springs.

[0045] A gap is provided between the conductive rod 23 of the upper conductive core 2 and the lower conductive core 4. The side wall of the connector 1 is provided with a mounting hole in the radial direction corresponding to the gap position. The mounting hole is connected to the through hole in the center of the connector 1. A mounting cavity is provided on the inner wall of the connector 1 on the side opposite to the mounting hole. The mounting hole, the through hole and the mounting cavity form a mounting space. The elastic switching unit 3 is set in the mounting space.

[0046] The flexible on / off unit 3 includes a blocking member 31, a piston 32, a first insulating rod 33, a conductive member 34, a second insulating rod 35, and a spring 36. The blocking member 31 is disposed inside the mounting hole and near the outer end of the mounting hole, and is used to prevent the piston 32 from dislodging from the mounting hole. A pressure transmission hole is opened in its center for connecting an external oil and gas well with the mounting hole. In this embodiment, the blocking member 31 is a blocking plug, which is screwed into the mounting hole.

[0047] The piston 32 is slidably mounted in the mounting hole, with its outer end face abutting against the inner end face of the blocking member 31. The structure of the piston 32, as shown in Figure 4, is a stepped shaft structure, including a coaxially connected piston major diameter section 321 and piston minor diameter section 322. The outer end face of the piston major diameter section 321 abuts against the inner end face of the blocking member 31. One end of the first insulating rod 33 is connected to the inner end face of the piston 32. To facilitate future replacement, a groove is provided at the center of the end face of the piston minor diameter section 322, and one end of the first insulating rod 33 is engaged in the groove. A sealing ring 6 is provided between the piston major diameter section 321 and the mounting hole to ensure sealing. A disassembly threaded hole 3211 is provided at the center of the outer end face of the piston major diameter section 321. During repair, the piston 32 can be removed simply by screwing a disassembly tool directly into the disassembly threaded hole 3211, making the operation simple.

[0048] The structure of the first insulating rod 33 is shown in Figure 5. It is a stepped shaft structure, including a large-diameter section 331 and a small-diameter section 332 of the first insulating rod connected coaxially. The large-diameter section 331 of the first insulating rod is engaged in a groove opened in the center of the small-diameter section 322 of the piston. The conductive element 34 is located at the other end of the first insulating rod 34. It can be located at the end of the small-diameter section 332 of the first insulating rod, or it can be sleeved on the outer wall of the end of the small-diameter section 332 of the first insulating rod. In this embodiment, for the convenience of connection, the conductive element 34 is a conductive sleeve, the structure of which is shown in Figure 6. It is sleeved on the outer wall of the end of the small-diameter section 332 of the first insulating rod.

[0049] The spring 36 is located inside the mounting cavity, with one end abutting against the bottom of the mounting cavity and the other end abutting against one end of the second insulating rod 35. The other end of the second insulating rod 35 abuts against the other end of the first insulating rod 33 and / or the conductive element 34, and both conductive rods 23 abut against the outer wall of the second insulating rod 35.

[0050] If the conductive element 34 is located at the end of the small-diameter section 332 of the first insulating rod, then the other end of the second insulating rod 35 abuts against the conductive element 34. If the conductive element 34 is fitted onto the outer wall of the small-diameter section 332 of the first insulating rod in the form of a conductive sleeve, then the other end of the second insulating rod 35 may abut against the small-diameter section 332 of the first insulating rod or abut against both the small-diameter section 332 of the first insulating rod and the conductive element 34 simultaneously.

[0051] In this embodiment, a limiting groove is formed at the center of the end of the small diameter section 332 of the first insulating rod, and the structure of the second insulating rod 35 is shown in Figure 7. It is a stepped shaft structure, including the small diameter section 351, the middle diameter section 352, and the large diameter section 353 of the second insulating rod connected coaxially in sequence. The large diameter section 353 of the second insulating rod abuts against the other end of the spring 36, and the small diameter section 351 of the second insulating rod is located in the limiting groove and abuts against the bottom of the limiting groove.

[0052] The second insulating rod's middle diameter section 352 includes a coaxially connected continuous section 3521 and an inclined transition section 3522. The continuous section 3521 is connected to the large diameter section 353 of the second insulating rod, and the inclined transition section 3522 is connected to the small diameter section 351 of the second insulating rod. The diameter of the inclined transition section 3522 gradually increases from the continuous section 3521 to the small diameter section 351 of the second insulating rod, thus forming a taper. This facilitates the sliding and resetting of the conductive rod 23 on the outer wall of the second insulating rod 35. Due to the presence of the taper, the conductive spring connected to the conductive rod 23 is compressed, ensuring the reliability of the circuit connection between the upper conductive core 2 and the lower conductive core 4. The width of the conductive element 34 is equal to the maximum diameter of the inclined transition section 3522, so that the conductive rod 23 will not be obstructed when sliding towards the conductive element 34. When the pressure is removed, the piston 32 is reset under the action of the spring 36, the second insulating rod 35 moves towards the first insulating rod 33, and the conductive rod 23 slides back to the continuous section 3521, so that the entire device can be reused.

[0053] The conductive rod 23 abuts against the outer wall of the continuous section 3521, and the outer diameter of the conductive sleeve is equal to the maximum diameter of the inclined transition section 3522. A limiting shoulder is formed at the connection between the small diameter section 351 of the second insulating rod and the inclined transition section 3522, and the limiting shoulder abuts against the conductive sleeve and the small diameter section 332 of the first insulating rod.

[0054] In use, the contacts 22 of the upper conductive core 2 and the lower conductive core 4 are connected to the power supply unit and the perforation device respectively to form a perforation string. At this time, the entire device is in the open circuit state as shown in Figure 1. The piston 32 is in the initial position, and both conductive rods 23 are in contact with the outer wall of the second insulating rod 35. Then, the perforation string is lowered into the oil and gas well. As the lowering depth increases, the pressure in the oil and gas well acts on the piston 32 through the pressure transmission hole. The piston 32 is pushed towards the second insulating rod 35, and the spring 36 is compressed. At this time, the conductive element 34 slowly moves between the two conductive rods 23. When the target formation is reached, the conductive element 34 is exactly between the two conductive rods 23, and both conductive rods 23 are in contact with the outer wall of the conductive element 34, thus making the well entry circuit conductive. At this time, the entire device is in the connected state as shown in Figure 2. The current flows from the power supply unit through the upper conductive core 2, the conductive element 34, and the lower conductive core 4 to the perforation device, which activates the perforation device and completes the perforation operation.

[0055] The embodiments described above are merely descriptions of specific implementations of this utility model and are not intended to limit the scope of this utility model. Various modifications and improvements made to the technical solutions of this utility model by those skilled in the art without departing from the spirit of this utility model should fall within the protection scope defined by the claims of this utility model.

Claims

1. A self-conducting device for the wellbore perforation circuit in oil and gas wells, characterized in that: The device includes a connector (1), an upper conductive core (2), an elastic switching unit (3), and a lower conductive core (4). A through hole is formed in the center of the connector (1), and the upper conductive core (2) and lower conductive core (4) are respectively disposed at the upper and lower ends of the through hole. The upper conductive core (2) and lower conductive core (4) have the same structure, each including an insulating shell (21), a contact (22), and a conductive rod (23). The insulating shell (21) is hollow and is disposed within the through hole. The contact (22) is fixedly disposed within the insulating shell (21) and located at the outer end of the insulating shell (21). The conductive rod... (23) is set inside the insulating shell (21) and at the inner end of the insulating shell (21). The contact (22) is connected to the corresponding conductive rod (23) by a conductive spring. A gap is provided between the upper conductive core (2) and the conductive rod (23) of the lower conductive core (4). The contact (22) of the upper conductive core (2) is used to connect to the power supply unit, and the contact (22) of the lower conductive core (4) is used to connect to the perforation device. The side wall of the connector (1) is provided with a mounting hole in the radial direction corresponding to the gap position. The mounting hole is connected to the through hole. A mounting cavity is provided on the inner wall of the connector (1) on the side opposite to the mounting hole. The mounting hole, through hole, and mounting cavity form an installation space, and the elastic switching unit (3) is installed within the installation space. The elastic switching unit (3) includes a blocking member (31), a piston (32), a first insulating rod (33), a conductive member (34), a second insulating rod (35), and a spring (36). The blocking member (31) is installed in the mounting hole and is located near the outer end of the mounting hole. A pressure transmission hole is opened in its center for connecting an external oil and gas well with the mounting hole. The piston (32) is slidably installed in the mounting hole, and its outer end face abuts against the inner end face of the blocking member (31). One end of the first insulating rod (33) is connected to the piston. (32) is connected to the inner end face. The conductive element (34) is disposed at the other end of the first insulating rod (33). The spring (36) is disposed in the mounting cavity, with one end abutting against the bottom of the mounting cavity and the other end abutting against one end of the second insulating rod (35). The other end of the second insulating rod (35) abuts against the other end of the first insulating rod (33) and / or the conductive element (34). When the piston (32) is in the initial position, both conductive rods (23) abut against the outer wall of the second insulating rod (35). When the piston (32) moves under pressure, both conductive rods (23) abut against the outer wall of the conductive element (34), thereby making the well entry circuit conductive.

2. The self-conducting device for perforation circuit in oil and gas wells according to claim 1, characterized in that: The piston (32) has a stepped shaft structure, including a piston large diameter section (321) and a piston small diameter section (322) connected coaxially. The outer end face of the piston large diameter section (321) abuts against the inner end face of the blocking member (31). A groove is provided at the center of the end face of the piston small diameter section (322), and one end of the first insulating rod (33) is engaged in the groove.

3. The self-conducting device for perforation circuit in oil and gas wells according to claim 2, characterized in that: The first insulating rod (33) is a stepped shaft structure, including a first insulating rod large diameter section (331) and a first insulating rod small diameter section (332) coaxially connected, the first insulating rod large diameter section (331) is snapped into a slot; the conductive element (34) is a conductive sleeve, which is sleeved on the outer wall of the end of the first insulating rod small diameter section (332), and the other end of the second insulating rod (35) abuts against the end of the first insulating rod small diameter section (332).

4. The self-conducting device for perforation circuit in oil and gas wells according to claim 3, characterized in that: The second insulating rod (35) has a stepped shaft structure, including a second insulating rod small diameter section (351), a second insulating rod medium diameter section (352), and a second insulating rod large diameter section (353) connected coaxially in sequence; a limiting groove is formed at the center of the end of the first insulating rod small diameter section (332); the second insulating rod large diameter section (353) abuts against the other end of the spring (36), and the second insulating rod small diameter section (351) is located in the limiting groove and abuts against the bottom of the limiting groove; the second insulating rod medium diameter section (352) includes a continuous section (3521) and an inclined transition section (3522) connected coaxially, the continuous section (3521) and the spring (3522) are connected coaxially. 21) Connected to the large diameter section (353) of the second insulating rod, the inclined transition section (3522) is connected to the small diameter section (351) of the second insulating rod, and the diameter of the inclined transition section (3522) gradually increases from the continuous section (3521) to the small diameter section (351) of the second insulating rod. The conductive rod (23) abuts against the outer wall of the continuous section (3521), and the outer diameter of the conductive sleeve is equal to the maximum diameter of the inclined transition section (3522). A limiting shoulder is formed at the connection between the small diameter section (351) of the second insulating rod and the inclined transition section (3522), and the limiting shoulder abuts against the conductive sleeve and the small diameter section (332) of the first insulating rod.

5. The self-conducting device for perforation circuit in oil and gas wells according to claim 4, characterized in that: It also includes a pressure cap (5), which has two parts and is screwed onto both ends of the through hole. The pressure cap (5) has a central hole for the contact (22) to pass through, and the outer end of the insulating shell (21) abuts against the inner end face of the pressure cap (5), and the inner end abuts against the abutting step provided on the inner wall of the through hole.

6. The self-conducting device for perforation circuit in oil and gas wells according to claim 5, characterized in that: The blocking component (31) is a blocking screw plug, which is screwed into the mounting hole.

7. The self-conducting device for perforation circuit in oil and gas wells according to claim 2, characterized in that: A sealing ring (6) is provided between the large diameter section (321) of the piston and the mounting hole.

8. The self-conducting device for perforation circuit in oil and gas wells according to claim 7, characterized in that: The piston's large-diameter section (321) has a detachable threaded hole (3211) at the center of its outer end face.

9. The self-conducting device for perforation circuit in oil and gas wells according to claim 1, characterized in that: A bracket (24) is provided inside the insulating shell (21). The bracket (24) is located between the contact (22) and the corresponding conductive rod (23). The bracket (24) is connected to the conductive rod (23) and the contact (22) respectively by conductive springs.

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