Adapter assembly of oil and gas well perforating device

Abstract

The utility model relates to a connecting device of a perforator, in particular to a crossover coupling assembly of an oil and gas well perforating device, which is used for solving the technical problems of insufficient stability, sealing performance and centering performance of the crossover coupling assembly of the existing oil and gas well perforating device. The adapter assembly of the oil and gas well perforating device comprises the middle connector, the middle core passing piece and the switch pressing cap, the electric through function is achieved through the middle core passing piece, the sealing performance under the high-pressure environment is ensured through a sealing ring groove in the middle connector, and rotation stability is provided through a bearing in a bearing ring groove; according to the utility model, the electrical transmission performance and the overall reliability of the oil-gas well perforating device are effectively improved, and the stable operation of the system under complex working conditions is ensured.

Description

Technical Field

[0001] This utility model relates to a connection device for a perforator, specifically to a conversion connector assembly for an oil and gas well perforation device. Background Technology

[0002] Existing oil and gas well perforation rigs typically consist of multiple interconnected perforation units. Each perforation unit includes a gun body and a cartridge rack coaxially mounted within the gun body, connected to adjacent perforation units via adapter assemblies. This type of rig enables multi-stage perforation operations and is suitable for complex downhole environments.

[0003] The adapter assembly is a key component for connecting various directional perforation units, but under harsh downhole conditions such as high pressure, high temperature, and vibration, existing adapter assemblies have the following shortcomings:

[0004] (1) The mechanical connection strength of the conversion joint assembly is insufficient, and it is easy to loosen or be damaged due to vibration or stress concentration during operation, resulting in reduced stability of the device;

[0005] (2) The sealing performance of the adapter assembly often fails to meet the requirements of the complex downhole environment, which may lead to fluid leakage, thereby affecting the safety and effectiveness of the perforation operation;

[0006] (3) The design of the adapter assembly did not fully consider the alignment of the perforation unit in the downhole environment. The device may have axis offset problems when connected, which will cause the perforation direction to be unable to be accurately aligned with the target formation, thereby increasing construction costs and safety risks.

[0007] In summary, the shortcomings of existing oil and gas well perforation devices in terms of connection methods and sealing performance restrict their application in efficient and safe operations. Optimizing connection methods and improving the stability, sealing performance, and alignment of adapter components are urgent technical problems to be solved in this field. Utility Model Content

[0008] The purpose of this invention is to solve the technical problems of insufficient stability, sealing performance and alignment of the conversion joint assembly of the existing oil and gas well perforation device, and to provide a conversion joint assembly for the oil and gas well perforation device.

[0009] To address the shortcomings of the existing technology, the present invention provides the following technical solution:

[0010] A converter joint assembly for an oil and gas well perforation device is characterized by comprising an intermediate joint, an intermediate core component coaxially disposed within the intermediate joint, and a switch pressure cap.

[0011] The intermediate joint has a central through hole along its axis and a joint limiting ring on its outer wall. The upper and lower parts of the intermediate joint are respectively used to extend between the bottom end of the gun body of the previous firing unit and the bottom end of the magazine, and between the top end of the gun body of the next firing unit and the top end of the magazine. At least one sealing ring groove is provided on the upper and lower outer walls. The upper and lower end faces of the joint limiting ring are respectively used to abut against the bottom end of the gun body of the previous firing unit and the top end of the gun body of the next firing unit to limit the installation position.

[0012] The inner wall of the central through hole is provided with a first inner convex ring. The upper and lower ends of the first inner convex ring are both formed with the inner wall of the central through hole. The upper bearing ring groove is provided with a bearing for cooperating with the bottom end of the cartridge of the previous perforation unit, and the lower bearing ring groove is provided with a bearing for cooperating with the top end of the cartridge of the next perforation unit.

[0013] A second inner convex ring is provided in the middle of the inner sidewall of the first inner convex ring;

[0014] The middle core component is located inside the second inner convex ring, and both ends are located outside the second inner convex ring. Both ends are provided with center contacts. The two center contacts are used to contact the electrical contacts of the previous perforation unit and the next perforation unit respectively to realize electrical connection.

[0015] The switch cap is fitted under the middle core component, and its outer side wall is connected to the inner side wall of the second inner convex ring.

[0016] Furthermore, the intermediate core component includes a conductive rod and a housing; the conductive rod has a center contact at both ends; the housing is sleeved on the conductive rod, and baffles are provided between both ends and the sidewalls of the conductive rod; the housing is located inside the second inner convex ring, and at least one sealing ring is provided between the outer sidewall of the housing and the inner sidewall of the second inner convex ring; the bottom surface of the housing abuts against the top surface of the switch cap.

[0017] Furthermore, a third inner convex ring is provided on the inner sidewall of the second inner convex ring, and the top surface of the outer shell abuts against the lower end surface of the third inner convex ring.

[0018] Furthermore, an axial protruding ring is provided on the top surface of the switch cap, the top surface of the switch cap abuts against the bottom surface of the second inner protruding ring, the axial protruding ring extends into the second inner protruding ring and abuts against the bottom surface of the outer shell, and the outer side wall of the axial protruding ring is threadedly connected to the inner side wall of the second inner protruding ring.

[0019] Furthermore, the outer ring of each bearing is installed in the bearing ring groove by stamping.

[0020] Furthermore, the upper and lower ends of the outer side wall of the intermediate joint both adopt a double male thread sealing structure.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] (1) The present invention provides a conversion joint assembly for an oil and gas well perforation device, including an intermediate joint, an intermediate core component and a switch cap. The intermediate core component enables electrical connection, the sealing ring groove on the intermediate joint ensures sealing performance under high pressure, and the bearing in the bearing ring groove provides rotational stability and centering. The present invention effectively improves the electrical transmission performance and overall reliability of the oil and gas well perforation device, and ensures stable operation of the system under complex working conditions.

[0023] (2) This utility model achieves electrical connection by having the center contact points at both ends of the conductive rod contact the electrical contacts of the previous perforation unit and the next perforation unit. It has the advantages of high self-orientation accuracy, low frictional resistance and high stability. It can maintain good electrical performance under extreme environments such as high pressure, high temperature and high rotation, and is especially suitable for harsh application scenarios such as oil and gas well perforation devices.

[0024] (3) This utility model installs the outer ring of the bearing in the bearing ring groove by stamping, which can effectively prevent the bearing from falling off under high pressure or vibration environment, and achieves stable installation and efficient rotation performance.

[0025] (4) This utility model limits the upper and lower positions of the outer shell by using the third inner convex ring and the switch cap respectively, and provides sealing protection by the sealing ring on the outer shell. In the complex perforation environment of oil and gas wells, it can significantly improve the reliability, sealing and operation stability of the device and meet the actual needs of high pressure and dynamic operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the conversion connector assembly for an oil and gas well perforation device according to the present invention;

[0027] Figure 2 This is a schematic diagram of the intermediate joint in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the intermediate core component in an embodiment of this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the device connecting two adjacent perforations in an embodiment of the present invention.

[0030] The reference numerals in the attached diagram are explained as follows: 010 - firing port unit; 011 - gun body; 012 - magazine;

[0031] 100 - Intermediate joint; 101 - Joint limiting ring; 102 - First inner convex ring; 103 - Second inner convex ring; 104 - Third inner convex ring; 105 - Sealing ring groove; 106 - Bearing ring groove;

[0032] 200 - Intermediate core component; 210 - Conductive rod; 220 - Outer shell; 230 - Baffle plate;

[0033] 300 - Switch cap; 400 - Bearing; 500 - Sealing ring. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Reference Figures 1-4 A conversion connector assembly for an oil and gas well perforation device includes an intermediate connector 100, an intermediate core component 200, and a switch cap 300.

[0036] Reference Figure 2 The intermediate joint 100 has a central through hole along its axis, a joint limiting ring 101 on its outer side wall, and four sealing ring grooves 105 symmetrically located on both sides of the joint limiting ring 101. The upper and lower parts of the intermediate joint 100 are respectively used to extend between the bottom end of the gun body 011 of the previous firing unit 010 and the bottom end of the magazine 012, and between the top end of the gun body 011 of the next firing unit 010 and the top end of the magazine 012. The upper and lower end faces of the joint limiting ring 101 are respectively used to abut against the bottom end of the gun body 011 of the previous firing unit 010 and the top end of the gun body 011 of the next firing unit 010 to limit the installation position. The four sealing ring grooves 105 are used to set the sealing rings 500 to achieve the sealing function.

[0037] A first inner convex ring 102 is provided on the inner wall of the central through hole. Bearing ring grooves 106 are formed between the upper and lower ends of the first inner convex ring 102 and the inner wall of the central through hole. A bearing 400 for cooperating with the bottom end of the spring frame 012 of the previous perforation unit 010 is provided in the upper bearing ring groove 106, and a bearing 400 for cooperating with the top end of the spring frame 012 of the next perforation unit 010 is provided in the lower bearing ring groove 106. The outer ring of each bearing 400 is installed in the bearing ring groove 106 by stamping to prevent the bearing 400 from falling off under high pressure or vibration.

[0038] A second inner convex ring 103 is provided in the middle of the inner sidewall of the first inner convex ring 102, and a third inner convex ring 104 is provided in the inner sidewall of the second inner convex ring 103.

[0039] The upper and lower ends of the outer side wall of the intermediate joint 100 both adopt a double male thread sealing structure.

[0040] Reference Figure 3 The intermediate core component 200 includes a conductive rod 210 and a housing 220; the conductive rod 210 is used for conducting electricity, and it achieves electrical continuity by using a center contact connection, which has the advantages of low frictional resistance and high self-orientation accuracy.

[0041] The outer shell 220 is sleeved on the conductive rod 210, and baffles 230 are provided at both ends between the outer shell 220 and the side wall of the conductive rod 210. The baffles 230 are used to fix the position of the outer shell 220. The outer wall of the outer shell 220 contacts the inner wall of the second inner convex ring 103, and two sealing rings 500 are provided between the outer wall of the outer shell 220 and the inner wall of the second inner convex ring 103. The top surface of the outer shell 220 abuts against the lower end surface of the third inner convex ring 104.

[0042] Reference Figure 1 The switch cap 300 is sleeved on the lower part of the conductive rod 210; an axial protruding ring is provided on the top surface of the switch cap 300, the top surface of the switch cap 300 abuts against the bottom surface of the second inner protruding ring 103, the axial protruding ring extends into the second inner protruding ring 103 and abuts against the bottom surface of the outer shell 220, and the outer side wall of the axial protruding ring is threadedly connected to the inner side wall of the second inner protruding ring 103.

Claims

1. A converter assembly for an oil and gas well perforation device, characterized in that: It includes an intermediate connector (100), an intermediate core component (200) coaxially disposed within the intermediate connector (100), and a switch cap (300); The intermediate joint (100) has a central through hole along its axis and a joint limiting ring (101) on its outer side wall. The upper and lower parts of the intermediate joint (100) are respectively used to extend between the bottom end of the gun body (011) of the previous firing unit (010) and the bottom end of the magazine (012), and between the top end of the gun body (011) of the next firing unit (010) and the top end of the magazine (012). At least one sealing ring groove (105) is provided on both the upper and lower outer side walls. The upper and lower end faces of the joint limiting ring (101) are respectively used to abut against the bottom end of the gun body (011) of the previous firing unit (010) and the top end of the gun body (011) of the next firing unit (010) to limit the installation position. The inner wall of the central through hole is provided with a first inner convex ring (102). The upper and lower ends of the first inner convex ring (102) are both formed with the inner wall of the central through hole to form bearing ring grooves (106). The upper bearing ring groove (106) is provided with a bearing (400) for cooperating with the bottom end of the spring frame (012) of the previous perforation unit (010). The lower bearing ring groove (106) is provided with a bearing (400) for cooperating with the top end of the spring frame (012) of the next perforation unit (010). A second inner convex ring (103) is provided in the middle of the inner sidewall of the first inner convex ring (102); The middle core component (200) is located inside the second inner convex ring (103) in the middle, and both ends are located outside the second inner convex ring (103). Both ends are provided with center contacts. The two center contacts are used to contact the electrical contacts of the previous perforation unit (010) and the next perforation unit (010) respectively to realize electrical connection. The switch cap (300) is fitted under the middle core component (200), and its outer side wall is connected to the inner side wall of the second inner convex ring (103).

2. The conversion connector assembly for an oil and gas well perforation device according to claim 1, characterized in that: The intermediate core component (200) includes a conductive rod (210) and a housing (220); the conductive rod (210) has a center contact at both ends; the housing (220) is sleeved on the conductive rod (210), and baffles (230) are provided between both ends and the side wall of the conductive rod (210); the housing (220) is located inside the second inner convex ring (103); at least one sealing ring (500) is provided between the outer side wall of the housing (220) and the inner side wall of the second inner convex ring (103); the bottom surface of the housing (220) abuts against the top surface of the switch cap (300).

3. The conversion connector assembly for an oil and gas well perforation device according to claim 2, characterized in that: The inner wall of the second inner convex ring (103) is provided with a third inner convex ring (104), and the top surface of the outer shell (220) abuts against the lower end surface of the third inner convex ring (104).

4. A conversion connector assembly for an oil and gas well perforation device according to claim 2 or 3, characterized in that: An axial protruding ring is provided on the top surface of the switch cap (300). The top surface of the switch cap (300) abuts against the bottom surface of the second inner protruding ring (103). The axial protruding ring extends into the second inner protruding ring (103) and abuts against the bottom surface of the outer shell (220). The outer wall of the axial protruding ring is threadedly connected to the inner wall of the second inner protruding ring (103).

5. The conversion connector assembly for an oil and gas well perforation device according to claim 4, characterized in that: The outer ring of each of the bearings (400) is installed in the bearing ring groove (106) by stamping.

6. The adapter assembly for an oil and gas well perforation device according to claim 5, characterized in that: The upper and lower ends of the outer side wall of the intermediate joint (100) both adopt a double male thread sealing structure.

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