Perforating gun connecting structure capable of reducing perforation

Abstract

The utility model discloses a perforating gun connecting structure capable of reducing opening holes, belongs to the technical field of perforating guns, and aims at solving the problems that when a plurality of perforating gun barrels are connected, heavy perforating gun barrels need to be rotated, and additional opening holes are needed to connect detonating cords in series. One side of the outer surface of the connecting block is fixedly sleeved with a locking sleeve, a rotating assembly is arranged on the outer surface of the connecting block, and a detonating mechanism is arranged in the connecting block; after one perforating gun barrel is connected with the connecting block, the locking screw is screwed to release the locking of the threaded sleeve, the threaded sleeve is rotated to connect the other perforating gun barrel, after the locking screw is screwed to lock the threaded sleeve and the two perforating gun barrels are connected, detonating cords in the two perforating gun barrels are connected in series through the conductive barrel and the conductive needle; the problems that when a plurality of perforating gun barrels are connected, the heavy perforating gun barrels need to be rotated, and holes need to be additionally formed to connect detonating cords in series are effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of perforating guns, and particularly relates to a connection structure of a perforating gun for reducing the number of openings. Background Technique

[0002] In the petroleum industry, perforating completion is the most widely used completion method at home and abroad; perforating is known as the "last kick" in the process of oil and gas exploration and development, and is a key link in well testing operations, directly affecting the productivity of oil and gas wells; currently, perforating guns are commonly used tools for oilfield drilling and cementing, and perforating guns are generally connected to adjacent two perforating gun barrels through perforating gun connectors.

[0003] In the prior art, there is a durable perforating gun connector with the patent publication number CN217681685U. Through the setting of the buffer component, the above patent can effectively reduce the impact of shock waves on the inside of the connector, thereby extending the service life of the connector. However, there are still the following deficiencies in actual use: during actual installation, it is necessary to first connect the connector to one perforating gun barrel, and then connect the other perforating gun barrel to the connector. At this time, it is necessary to rotate the relatively heavy perforating gun barrel, which is troublesome to install and affects work efficiency. Moreover, the current perforating gun needs to open holes during use, and then perform cumbersome operations such as separately assembling the wires inside the connector, which is time-consuming and laborious.

[0004] Therefore, a connection structure of a perforating gun for reducing the number of openings is needed to solve the problems in the prior art that when connecting multiple perforating gun barrels, it is necessary to rotate the relatively heavy perforating gun barrel, and it is necessary to additionally open holes to connect the detonating wires in series. Content of the Utility Model

[0005] The purpose of the utility model is to provide a connection structure of a perforating gun for reducing the number of openings to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a connection structure of a perforating gun for reducing the number of openings, including a connection block, a boss is tightly sleeved on the outer surface of the connection block, a locking sleeve is tightly sleeved on one side of the outer surface of the connection block, an annular groove is formed between the boss and the locking sleeve, a small hole is coaxially opened inside the connection block, a positioning groove communicated with the small hole is opened inside the connection block, a rotating assembly is arranged on the outer surface of the connection block, and a detonating mechanism is arranged inside the connection block;

[0007] The rotating assembly includes a threaded sleeve, the threaded sleeve is rotatably sleeved inside the annular groove, a plurality of circumferentially distributed threaded holes are penetrated through the outer surface of the threaded sleeve, a locking screw is threadedly inserted into each threaded hole, and a plurality of circumferentially distributed wrench holes are opened on the outer surface of the threaded sleeve.

[0008] It should be noted in the solution that the detonating mechanism includes an electrical connector. The outer surface of the electrical connector is fixedly connected to the inner surface of the small hole. A cavity is provided inside the electrical connector. A conductive cylinder is fixedly connected to the inner surface of the cavity. An installation groove is provided inside the conductive cylinder. An insulating sleeve is fixedly connected to the inner surface of the installation groove. One side outer wall of the insulating sleeve slidably penetrates through one side outer wall of the electrical connector. A limiting plate is slidably connected to the inner surface of the installation groove. A conductive pin is inserted through the center of the side wall of the limiting plate. The outer surface of the conductive pin is slidably connected to the inner surface of the insulating sleeve and one side outer wall extends into the positioning groove. A spring is sleeved on the outer surface of the other side of the conductive pin. One side outer wall of the spring is fixedly connected to one side inner wall of the installation groove. The other side outer wall of the spring is fixedly connected to one side outer wall of the limiting plate.

[0009] It is further worth noting that external threads are provided on the outer surfaces of both the connecting block and the threaded sleeve, and an O-ring is provided on the outer surface of the threaded sleeve.

[0010] It is even further necessary to note that two first sealing rings distributed in parallel are tightly sleeved on the outer surface of the electrical connector, and two second sealing rings distributed in parallel are tightly sleeved on the outer surface of the conductive cylinder.

[0011] As a preferred implementation manner, the small hole, the positioning groove, the cavity and the installation groove are coaxial, and the threaded hole and the wrench hole are arranged in a staggered manner.

[0012] As a preferred implementation manner, grooves matching the first sealing ring and the second sealing ring are provided inside both the small hole and the cavity, and one side outer wall of the conductive cylinder penetrates through one side outer wall of the electrical connector.

[0013] Compared with the prior art, the perforating gun connection structure with reduced hole opening provided by the present utility model has at least the following beneficial effects:

[0014] (1) Through the action of the rotating assembly, after connecting one perforating gun barrel to the connecting block, loosen the locking screw to release the locking of the threaded sleeve, rotate the threaded sleeve to connect the other perforating gun barrel through the external thread, and finally tighten the locking screw to lock the threaded sleeve again, completing the connection of adjacent perforating gun barrels. The operation is simple, effectively avoiding the problem that it is necessary to rotate the relatively heavy perforating gun barrels when connecting multiple perforating gun barrels.

[0015] (2) Through the action of the detonating mechanism, when connecting two perforating gun barrels, the detonating wire in one barrel contacts one side of the conductive cylinder, and the detonating wire in the other barrel pushes the conductive needle to move, so that one side of the conductive needle contacts one side of the conductive cylinder. The detonating wires inside the two perforating gun barrels are connected in series through the conductive cylinder and the conductive needle, eliminating the need for cumbersome operations such as additional hole opening and wiring. This simplifies the process of assembling the perforator by the staff and effectively avoids the problem of connecting multiple perforating guns that requires additional hole opening to connect the detonating wires in series. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall structure of the present invention;

[0017] Figure 2 Schematic diagram of the structure of the present invention with the threaded sleeve removed;

[0018] Figure 3 Front view sectional structure schematic diagram of the threaded sleeve of the present invention;

[0019] Figure 4 Front view sectional structure schematic diagram of the connecting block of the present invention.

[0020] In the figure: 1, connecting block; 2, boss; 3, locking sleeve; 4, annular groove; 5, small hole; 6, positioning groove; 7, rotating assembly; 71, threaded sleeve; 72, threaded hole; 73, locking screw; 74, wrench hole; 8, detonating mechanism; 81, electrical connector; 82, cavity; 83, conductive cylinder; 84, installation groove; 85, insulating sleeve; 86, limiting plate; 87, conductive needle; 88, spring; 9, external thread; 10, O-ring; 11, first sealing ring; 12, second sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present invention will be further described below in conjunction with embodiments.

[0022] Please refer to Figures 1-4 , the present invention provides a connection structure for a perforating gun that reduces hole opening, including a connecting block 1. A boss 2 is tightly sleeved on the outer surface of the connecting block 1, and a locking sleeve 3 is tightly sleeved on one side of the outer surface of the connecting block 1. An annular groove 4 is formed between the boss 2 and the locking sleeve 3. A small hole 5 is coaxially opened inside the connecting block 1, and a positioning groove 6 communicating with the small hole 5 is opened inside the connecting block 1. A rotating assembly 7 is arranged on the outer surface of the connecting block 1, and a detonating mechanism 8 is arranged inside the connecting block 1;

[0023] The rotating assembly 7 includes a threaded sleeve 71. The threaded sleeve 71 is rotatably sleeved inside the annular groove 4. A plurality of circumferentially distributed threaded holes 72 are penetrated through the outer surface of the threaded sleeve 71. A locking screw 73 is threadedly inserted into each threaded hole 72, and a plurality of circumferentially distributed wrench holes 74 are opened on the outer surface of the threaded sleeve 71.

[0024] Further, as shown in Figure 1 , Figure 2 and Figure 4 it is worth specifically explaining that the detonating mechanism 8 includes an electrical connector 81. The outer surface of the electrical connector 81 is fixedly connected to the inner surface of the small hole 5. A cavity 82 is formed inside the electrical connector 81. A conductive cylinder 83 is fixedly connected to the inner surface of the cavity 82. An installation groove 84 is formed inside the conductive cylinder 83. An insulating sleeve 85 is fixedly connected to the inner surface of the installation groove 84. One outer wall of the insulating sleeve 85 slidably penetrates one outer wall of the electrical connector 81. A limiting plate 86 is slidably connected to the inner surface of the installation groove 84. A conductive needle 87 is inserted through the center of the side wall of the limiting plate 86. The outer surface of the conductive needle 87 is slidably connected to the inner surface of the insulating sleeve 85 and one outer wall extends into the positioning groove 6. A spring 88 is sleeved on the outer surface of the other side of the conductive needle 87. One outer wall of the spring 88 is fixedly connected to one inner side wall of the installation groove 84. The other outer wall of the spring 88 is fixedly connected to one outer wall of the limiting plate 86.

[0025] Further, as shown in Figure 1 , Figure 2 and Figure 3 it is worth specifically explaining that external threads 9 are provided on the outer surfaces of both the connecting block 1 and the threaded sleeve 71, and an O-ring 10 is provided on the outer surface of the threaded sleeve 71.

[0026] Further, as shown in Figure 4 it is worth specifically explaining that two first sealing rings 11 distributed in parallel are tightly sleeved on the outer surface of the electrical connector 81, and two second sealing rings 12 distributed in parallel are tightly sleeved on the outer surface of the conductive cylinder 83.

[0027] Further, as shown in Figure 1 , Figure 3 and Figure 4 it is worth specifically explaining that the small hole 5, the positioning groove 6, the cavity 82 and the installation groove 84 are coaxial, ensuring that after the connecting block 1 is connected to the perforating gun, the conductive needle 87 and the detonating wire in the perforating gun are on the same axis. The threaded hole 72 and the wrench hole 74 are arranged in a staggered manner, ensuring the firmness of the connection during locking and facilitating the operation of the wrench.

[0028] Further, as shown in Figure 4 it is worth specifically explaining that grooves matching the first sealing ring 11 and the second sealing ring 12 are provided inside both the small hole 5 and the cavity 82, improving the sealing performance inside the connecting block 1. One outer wall of the conductive cylinder 83 passes through one outer wall of the electrical connector 81, facilitating contact with the detonating wire in the connected perforating gun.

[0029] In summary, when the connection structure is in use, first connect the side of the connection block 1 away from the threaded sleeve 71 to a perforating gun barrel through the external thread 9. Then, turn the locking screw 73. Under the action of the thread, the bottom end of the locking screw 73 gradually rises inside the threaded hole 72 to release the locking of the threaded sleeve 71. Under the action of the annular groove 4, the threaded sleeve 71 can rotate on the outer surface of the connection block 1. At this time, connect another perforating gun barrel corresponding to the threaded sleeve 71. Use a wrench to turn the threaded sleeve 71 through the wrench hole 74 to lock the external thread 9 on the outer surface of the threaded sleeve 71 with another perforating gun barrel. Finally, tighten the locking screw 73 to lock the threaded sleeve 71 on the connection block 1 again, thereby completing the connection of adjacent perforating gun barrels. On the contrary, the connection block 1 can be disassembled from the adjacent perforating gun barrels. The operation is simple, effectively avoiding the problem of rotating the relatively heavy perforating gun barrels when connecting multiple perforating gun barrels.

[0030] When the connection block 1 is connected to two perforating gun barrels, one side of the conductive cylinder 83 contacts the detonating wire inside one of the perforating gun barrels. The detonating wire inside the other perforating gun barrel pushes the conductive pin 87 to move in the installation groove 84 towards the conductive cylinder 83. After the two perforating gun barrels are connected, one side of the conductive pin 87 contacts one side of the conductive cylinder 83. At this time, the detonating wires inside the two perforating gun barrels are connected in series through the conductive cylinder 83 and the conductive pin 87 to ensure the normal use of the perforator. The provided electrical connector 81 enables the operator to directly connect the perforating gun and the connection block 1, eliminating the need for cumbersome operations such as additional hole opening and wiring. It simplifies the process of assembling the perforator by the staff and effectively avoids the problem of connecting the detonating wires in series by additional hole opening when connecting multiple perforating guns.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Perforating gun connection structure with reduced openings, comprising a connection block (1), characterized in that: A boss (2) is tightly sleeved on the outer surface of the connecting block (1). A locking sleeve (3) is tightly sleeved on one side of the outer surface of the connecting block (1). An annular groove (4) is formed between the boss (2) and the locking sleeve (3). A small hole (5) is coaxially opened inside the connecting block (1). A positioning groove (6) communicating with the small hole (5) is opened inside the connecting block (1). A rotating assembly (7) is arranged on the outer surface of the connecting block (1). An explosive guiding mechanism (8) is arranged inside the connecting block (1); The rotating assembly (7) includes a threaded sleeve (71). The threaded sleeve (71) is rotatably sleeved inside the annular groove (4). A plurality of circumferentially distributed threaded holes (72) are penetrated through the outer surface of the threaded sleeve (71). A locking screw (73) is threadedly inserted into each of the threaded holes (72). A plurality of circumferentially distributed wrench holes (74) are opened on the outer surface of the threaded sleeve (71).

2. The perforating gun connection structure with reduced openings according to claim 1, wherein: The explosive guiding mechanism (8) includes an electrical connector (81). The outer surface of the electrical connector (81) is fixedly connected to the inner surface of the small hole (5). A cavity (82) is opened inside the electrical connector (81). A conductive cylinder (83) is fixedly connected to the inner surface of the cavity (82). An installation groove (84) is opened inside the conductive cylinder (83). An insulating sleeve (85) is fixedly connected to the inner surface of the installation groove (84). One side outer wall of the insulating sleeve (85) slidably penetrates through one side outer wall of the electrical connector (81). A limiting plate (86) is slidably connected to the inner surface of the installation groove (84). A conductive needle (87) is inserted through the center of the side wall of the limiting plate (86). The outer surface of the conductive needle (87) is slidably connected to the inner surface of the insulating sleeve (85) and one side outer wall extends into the positioning groove (6). A spring (88) is sleeved on the other side outer surface of the conductive needle (87). One side outer wall of the spring (88) is fixedly connected to one side inner wall inside the installation groove (84). The other side outer wall of the spring (88) is fixedly connected to one side outer wall of the limiting plate (86).

3. The perforating gun connection structure with reduced openings according to claim 2, characterized in that: External threads (9) are opened on the outer surfaces of the connecting block (1) and the threaded sleeve (71). An O-ring (10) is arranged on the outer surface of the threaded sleeve (71).

4. The perforating gun connection structure with reduced openings according to claim 3, characterized in that: Two parallel-distributed first sealing rings (11) are tightly sleeved on the outer surface of the electrical connector (81). Two parallel-distributed second sealing rings (12) are tightly sleeved on the outer surface of the conductive cylinder (83).

5. The perforating gun connection structure with reduced openings according to claim 4, characterized in that: The small hole (5), the positioning groove (6), the cavity (82) and the installation groove (84) are coaxial. The threaded holes (72) and the wrench holes (74) are arranged in a staggered manner.

6. The perforating gun connection structure with reduced openings according to claim 5, characterized in that: Grooves matched with the first sealing ring (11) and the second sealing ring (12) are opened inside the small hole (5) and the cavity (82). One side outer wall of the conductive cylinder (83) passes through one side outer wall of the electrical connector (81).

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