A quick connector and a clustered perforation tool string

Abstract

This utility model relates to a quick connector and a cluster perforation tool string, belonging to the field of mining equipment technology. The quick connector includes: a first connector, with a first connecting portion at its first end and a second connecting portion at its second end; a second connector, with a connecting sleeve rotatably connected to its first end, the connecting sleeve being threadedly connected to the second connecting portion, allowing the first connector and the connecting sleeve to rotate together relative to the second connector; and a third connecting portion at its second end. When the weight bar needs to be replaced, simply rotate the connecting sleeve to detach it from the second connecting portion of the first connector, while maintaining a rotatable connection with the second connector. This achieves the disassembly of the first and second connectors, thereby separating the weight bar from the bridle. The weight bar and bridle can be separated without rotating either; the operation is more time-saving and labor-saving, improving construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a quick connector and a cluster perforation tool string. Background Technology

[0002] In recent years, China has vigorously developed shale oil and gas, with cluster perforation and staged fracturing becoming the mainstream technologies. A typical cluster perforation tool string usually consists of components such as a bridle, weight bar, magnetic locator, and perforation gun. The cluster perforation tool string needs to be lowered into the well to a designated location via a cable. The bridle connects the cable to the downhole instruments, enabling signal transmission and mechanical connection; it is an indispensable component of the cluster perforation tool string. The weight bar increases the weight of the tool string, allowing it to be lowered smoothly into the well and maintaining stability.

[0003] Cluster perforation work typically requires multiple consecutive trips per day, with the bridle needing to be quickly replaced after each section is completed. To improve efficiency, the bridle and weight bar of the cluster perforation tool string need to be able to be quickly connected and disassembled. However, the bridle and weight bar are usually connected by threads. Since the bridle contains cables, the weight bar usually needs to be rotated to connect and disconnect the bridle and weight bar. The weight bar is heavy, making the operation time-consuming and laborious, which is not conducive to operation and greatly reduces the construction efficiency, failing to meet the requirements for speed and efficiency. Utility Model Content

[0004] The purpose of this application is to provide a quick connector and a clustered perforation tool string to facilitate the assembly and disassembly of the weight bar and the bridle, simplifying the operation and improving construction efficiency.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A quick connector, comprising:

[0007] A first connector, wherein a first end of the first connector has a first connecting portion and a second end of the first connector has a second connecting portion;

[0008] The second connector has a connecting sleeve rotatably connected to its first end, and the connecting sleeve can be threadedly connected to the second connecting part so that the first connector and the connecting sleeve can rotate together relative to the second connector; the second end of the second connector has a third connecting part.

[0009] When using the quick connector provided in this application embodiment, the first connecting part of the first connector is fixedly connected to the bridle, the third connecting part of the second connector is fixedly connected to the weight bar, and the second connecting part of the first connector is fixedly connected to the connecting sleeve by threads. When it is necessary to replace the weight bar, simply rotate the connecting sleeve so that the connecting sleeve rotates relative to the first connector, thereby separating the connecting sleeve from the second connecting part of the first connector. The connecting sleeve remains rotatably connected to the second connector, thus achieving the disassembly of the first and second connectors, and consequently, the separation of the weight bar and the bridle. It should be noted that during the rotation of the connecting sleeve, since the connecting sleeve is rotatably connected to the second connector, only the connecting sleeve needs to be rotated; the weight bar and the bridle do not need to be rotated to achieve the separation of the weight bar and the bridle. This operation is more time-saving and labor-saving, and helps to improve construction efficiency.

[0010] It should be noted that for counterweights with different outer diameters, multiple second connectors can be fixedly connected to counterweights of different outer diameters respectively. The first ends of these multiple second connectors are of the same size, and each first end of the multiple second connectors is rotatably connected to a connecting sleeve. This allows the connecting sleeves connected to the first ends of the multiple second connectors to match and be fixedly connected to the second connecting part of the same first connector. With this configuration, when replacing counterweights with different outer diameters, the counterweight, along with the second connectors and connecting sleeves connected to it, are replaced together, enabling counterweights of different outer diameters to be matched and connected to the same bridle, thus improving the versatility of the bridle. The outer diameter of the counterweight can be 73mm, 80mm, 89mm, or 97mm, etc., and an appropriate size counterweight can be selected according to the actual situation.

[0011] In one implementation, the outer wall of the connecting sleeve has threads, the second connecting part has internal threads, and the connecting sleeve can be threadedly connected to the second connecting part.

[0012] In one implementation, the connecting sleeve includes a first sub-sleeve and a second sub-sleeve distributed radially thereon; the first sub-sleeve and the second sub-sleeve are detachably and fixedly connected.

[0013] In one implementation, the first connecting part is threaded, and the first connector is threadedly connected to the bridle via the first connecting part; and / or, the third connecting part is threaded, and the second connector is threadedly connected to the weight bar via the third connecting part.

[0014] In one implementation, the outer wall of the first connecting portion of the first connector is provided with a sealing groove for accommodating a sealing ring; and / or, the outer wall of the third connecting portion of the second connector is provided with a sealing groove for accommodating a sealing ring.

[0015] In one implementation, at least one retaining ring is provided in any of the sealing grooves, which fits against the sidewall of the sealing groove, and the height of the retaining ring is greater than the depth of the sealing groove.

[0016] In one implementation, the first connector is hollow to form a first inner cavity, the first end of the second connector extends through the connecting sleeve into the first inner cavity, and a first sealing ring is provided between the second connector and the inner wall of the first inner cavity.

[0017] In one implementation, the second connector has a hollow interior forming a second inner cavity, and the second connector is also provided with a cable sealing connector; the first end of the first connector is also provided with a signal connection end; a cable guide is also provided in the first inner cavity or the second inner cavity; the cable can pass through the cable sealing connector and communicate with the cable guide.

[0018] In one implementation, the wire guide includes a first insulating sleeve that contacts and is fixed relative to the second inner cavity, two signal transmission ends that are respectively fixed to both ends of the first insulating sleeve, and a signal conduction component fixed inside the first insulating sleeve, wherein both ends of the signal conduction component are communicatively connected to the two signal transmission ends.

[0019] In one implementation, an insulating internal connector is further provided inside the first inner cavity;

[0020] The insulating inner plug includes an insulating component that contacts and is fixed relative to the first inner cavity, and a communication component that passes through the insulating component and is communicatively connected to a signal connection terminal at the first end of the first connector.

[0021] In one implementation, the insulating component includes a first insulating ring, a second insulating sleeve, and a second insulating ring arranged sequentially along the direction close to the signal connection end; the communication component includes a threaded rod passing through the first insulating ring, a threaded cylinder passing through the second insulating ring, and a second spring disposed within the threaded cylinder, wherein the signal connection end is fixedly connected to a first end of the threaded cylinder;

[0022] The first end of the threaded rod is pressed against the side of the first insulating ring away from the second insulating ring, the first end of the threaded cylinder is pressed against the side of the second insulating ring away from the first insulating ring, the second end of the threaded rod is threadedly fixedly connected to the second end of the threaded cylinder, one end of the second spring is in contact with the second end of the threaded rod and the other end of the second spring is in contact with the signal connection end.

[0023] In one implementation, the outer walls of both the first connector and / or the second connector are provided with insertion holes.

[0024] A clustered perforation tool string includes a bridle and a weight bar, and also includes a quick connector as described in any one of the above descriptions, wherein a first connecting portion of a first connector of the quick connector is fixedly connected to the bridle, and a third connecting portion of a second connector of the quick connector is fixedly connected to the weight bar.

[0025] Compared with the prior art, the beneficial effects of the clustered perforation tool string provided in this application are the same as those of the quick connectors mentioned above, and will not be repeated here. Attached Figure Description

[0026] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0027] Figure 1 A cross-sectional view of a quick connector provided in an embodiment of this application;

[0028] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0029] Figure 3 for Figure 1 A magnified view of a portion of region B in the middle;

[0030] Figure 4 This is a schematic diagram illustrating the fit between the retaining ring and the sealing groove in an embodiment of this application.

[0031] Figure label:

[0032] 1-Second connector, 101-Third connecting part, 2-Sealing groove, 3-Cable sealing connector, 4-Second sealing ring, 5-Connecting sleeve, 6-First sealing ring, 7-First connector, 701-First connecting part, 8-Insulating inner connector, 81-First insulating ring, 82-Threaded rod, 83-Second insulating sleeve, 84-Second insulating ring, 85-Second spring, 86-Threaded cylinder, 9-Wire guide, 91-First insulating sleeve, 92-Signal transmission end, 93-First spring, 94-Signal conductor, 10-Signal connection end, 11-Retaining ring. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In the clustered perforation tool string structure, the bridle and the weight bar are generally connected by threads. Since the bridle contains cables, it is generally necessary to rotate the weight bar to assemble and disassemble the bridle and the weight bar. The weight bar is heavy, which is time-consuming and laborious to operate, which is not conducive to operation and greatly reduces the construction efficiency, failing to meet the requirements of speeding up and improving efficiency.

[0039] In response to the above situation, such as Figure 1 As shown, this application provides a quick connector, which is mainly used to connect a horse bridle and a weight bar. The quick connector includes a first connector 7 and a second connector 1. The first connector 7 is used to connect to the horse bridle, and the second connector 1 is used to connect to the weight bar; the quick connector is located entirely between the horse bridle and the weight bar.

[0040] Specifically, along the extending direction of the first connector 7, the two ends of the first connector 7 are a first end and a second end, respectively. The first end of the first connector 7 has a first connecting portion 701, and the second end of the first connector 7 has a second connecting portion; the first connecting portion 701 at the first end is used for fixed connection with the bridle.

[0041] Along the extension direction of the second connector 1, the two ends of the second connector 1 are respectively the first end of the second connector 1 and the second end of the second connector 1. A connecting sleeve 5 is rotatably connected to the first end of the second connector 1. The connecting sleeve 5 can be threadedly connected to the second connecting part, so that the first connector 7 and the connecting sleeve 5 are relatively fixed and can rotate together relative to the second connector 1. Specifically, the connecting sleeve 5 is sleeved on the first end of the second connector 1, and the connecting sleeve 5 can rotate relative to the first end of the second connector 1. The second connecting part is threadedly connected to the connecting sleeve 5, so that the connecting sleeve 5 and the first connector 7 are relatively fixed, and the connecting sleeve 5 and the first connector 7 can rotate together relative to the second connector 1. The second end of the second connector 1 has a third connecting part 101, which is used for fixed connection with the weighting rod. The first connector 7 and the second connector 1 extend in the same direction, and the extension directions of the first connector 7 and the second connector 1 can be the same as the extension direction of the centerline of the weighting rod.

[0042] When using the quick connector provided in this application embodiment, the first connecting part 701 of the first connector 7 is fixedly connected to the bridle, the third connecting part 101 of the second connector 1 is fixedly connected to the weight bar, and the second connecting part of the first connector 7 is fixedly connected to the connecting sleeve 5 by threads. When it is necessary to replace the weight bar, simply rotate the connecting sleeve 5 so that the connecting sleeve 5 rotates relative to the first connector 7, thereby separating the connecting sleeve 5 from the second connecting part of the first connector 7. The connecting sleeve 5 remains rotatably connected to the second connector 1, thus achieving the disassembly of the first connector 7 and the second connector 1, and consequently, the separation of the weight bar and the bridle. It should be noted that during the rotation of the connecting sleeve 5, since the connecting sleeve 5 is rotatably connected to the second connector 1, only the connecting sleeve 5 needs to be rotated; the weight bar and the bridle do not need to be rotated to achieve the separation of the weight bar and the bridle. The operation is more time-saving and labor-saving, which helps to improve construction efficiency.

[0043] It should be noted that for counterweights with different outer diameters, multiple second connectors 1 can be fixedly connected to multiple counterweights with different outer diameters. The first ends of the multiple second connectors 1 are of the same size, and each first end of the multiple second connectors 1 is rotatably connected to a connecting sleeve 5. This allows the connecting sleeve 5 connected to the first ends of the multiple second connectors 1 to match and be fixedly connected to the second connecting part of the same first connector 7. With this configuration, when replacing counterweights with different outer diameters, the counterweight, as well as the second connector 1 and connecting sleeve 5 connected to it, are replaced together, enabling counterweights with different outer diameters to be matched and connected to the same bridle, thus improving the versatility of the bridle. The outer diameter of the counterweight can be 73mm, 80mm, 89mm, or 97mm, etc., and an appropriate size counterweight can be selected according to the actual situation.

[0044] In some embodiments, the first connector 7 and / or the second connector 1 can be alloy connectors, such as steel connectors. The connecting sleeve 5 can be an alloy sleeve, such as a steel sleeve. Thus, the first connector 7, the second connector 1, and the connecting sleeve 5 have high impact resistance, corrosion resistance, and a high fatigue limit. For example, the tensile strength of the first connector 7, the second connector 1, and the connecting sleeve 5 is ≥1080 MPa; the yield strength of the first connector 7, the second connector 1, and the connecting sleeve 5 is ≥930 MPa. The materials of the first connector 7, the second connector 1, and the connecting sleeve 5 can be the same or different, and are not limited herein.

[0045] In some embodiments, a reinforcing layer can be formed on the surfaces of the first connector 7, the second connector 1, and the connecting sleeve 5. Specifically, nitrogen atoms are inserted into the metal surface to form the reinforcing layer. This gives the reinforcing layer on the surfaces of the first connector 7, the second connector 1, and the connecting sleeve 5 significant advantages such as high strength, wear resistance, and corrosion resistance. The surface hardness can reach HV1000 or higher. It can also reduce the sticking phenomenon between the same materials. Furthermore, this process can reduce perforation vibration and minimize product deformation.

[0046] In some embodiments, such as Figure 1 As shown, the outer wall of the connecting sleeve 5 has threads, and the second connecting part has internal threads, allowing the connecting sleeve 5 to be threadedly connected to the second connecting part. In this technical solution, the connecting sleeve 5 needs to extend into the second end of the first connector 7 to achieve a threaded connection, which helps to ensure a seal between the connecting sleeve 5 and the second connector 1, preventing mud, sewage, etc. from seeping into the quick connector during operation, thereby avoiding mud, sewage, etc. from affecting the normal operation of the cluster perforation tool string.

[0047] In some embodiments, the connecting sleeve 5 includes a first sleeve and a second sleeve distributed radially thereon, which are detachably and fixedly connected. This simplifies the installation steps of the connecting sleeve 5, requiring only the first and second sleeves to be fixed relative to each other radially, eliminating the need for axial movement during installation. This makes the operation simple and convenient, and helps improve construction efficiency.

[0048] The first and second sleeves can be fixedly connected by screws, with the screws passing through the connecting portion of both sleeves to achieve relative fixation. Of course, the first and second sleeves can also be secured by snap-fitting or other methods, which is also within the scope of this application.

[0049] In some embodiments, a bearing, bushing, or other component may be provided between the connecting sleeve 5 and the first end of the second connector 1 to reduce friction between the connecting sleeve 5 and the first end of the second connector 1 and extend the service life of the quick connector.

[0050] In some embodiments, the first connecting portion 701 is threaded, and the first connector 7 is threadedly connected to the bridle via the first connecting portion 701. This arrangement not only facilitates manufacturing but also makes the assembly and disassembly of the first connector 7 and the bridle simpler and more convenient. Of course, the fixed connection between the first connector 7 and the bridle via snap-fit, interference fit, or other methods is also within the scope of protection of this application.

[0051] In some embodiments, such as Figure 1 As shown, the outer wall of the first connecting portion 701 of the first connector 7 is provided with a sealing groove 2 for accommodating a sealing ring. Using this technical solution, after the first connecting portion 701 of the first connector 7 is threadedly connected to the bridle, the first connecting portion 701 of the first connector 7 extends into the interior of the bridle. The sealing ring, located within the sealing groove 2, is positioned between the first connecting portion 701 and the bridle to seal the space between them, preventing sewage, mud, dust, etc., from entering the bridle through the gap between the first connecting portion 701 and the bridle, thereby ensuring the stability of the bridle's operation. Specifically, the number of sealing grooves 2 on the outer wall of the first connecting portion 701 can be one or more, such as two, three, or four.

[0052] In some embodiments, the third connecting part 101 is threaded, and the second connector 1 is threadedly connected to the weight rod through the third connecting part 101. This arrangement not only facilitates manufacturing but also makes the assembly and disassembly of the second connector 1 and the weight rod simpler and more convenient. Of course, the fixed connection between the second connector 1 and the weight rod through snap-fit, interference fit, or other methods is also within the scope of protection of this application.

[0053] In some embodiments, such as Figure 1 As shown, the outer wall of the third connecting portion 101 of the second connector 1 is provided with a sealing groove 2 for accommodating the sealing ring. Using this technical solution, after the third connecting portion 101 of the second connector 1 is threadedly connected to the weight rod, the third connecting portion 101 extends into the interior of the weight rod. The sealing ring, located within the sealing groove 2, is positioned between the third connecting portion 101 and the weight rod to seal the space between them, preventing sewage, mud, dust, etc., from entering the quick connector and the weight rod through the gap between the third connecting portion 101 and the weight rod, thereby ensuring operational stability. Specifically, the number of sealing grooves 2 on the outer wall of the third connecting portion 101 can be one or more, such as two, three, or four.

[0054] In some embodiments, to prevent the sealing ring from being squeezed and deformed within the sealing groove 2 into the gap on the side of the sealing groove 2, such as... Figure 4As shown, at least one retaining ring 11 is provided in each sealing groove 2, conforming to the side wall of the sealing groove 2. The height of the retaining ring 11 is greater than the depth of the sealing groove 2. Using this technical solution, under high temperature and high pressure fluctuations, the retaining ring 11 provides additional support and protection, preventing the sealing ring from being squeezed or damaged under high pressure or pressure fluctuations. It also prevents the sealing ring in the sealing groove 2 from being squeezed and deformed, thus preventing it from entering the gap on the side of the sealing groove 2. Under the action of medium pressure, the retaining ring 11 and the sealing ring together form a secondary sealing effect, further enhancing the sealing effect. The retaining wall can be made of plastic, such as polyetheretherketone (PEEK).

[0055] In some embodiments, such as Figure 1 As shown, the outer wall of the third connecting part 101 of the second connector 1 is also provided with an inclined guide surface. Along the direction close to the first end of the second connector 1, the inclined guide surface gradually tilts away from the center line of the second connector 1. With this configuration, while connecting the weight rod and the third connecting part 101, the weight rod can move along the inclined guide surface, so that the third connecting part 101 of the second connector 1 can extend into the interior of the weight rod. This facilitates the rapid alignment of the weight rod and the second connector 1, further improving installation efficiency.

[0056] In some embodiments, such as Figure 1 As shown, the first connector 7 has a hollow interior forming a first inner cavity. The first end of the second connector 1 extends through the connecting sleeve 5 into the first inner cavity, and a first sealing ring 6 is provided between the second connector 1 and the inner wall of the first inner cavity. With this arrangement, the overlap between the first connector 7 and the second connector 1 is greater along the extension direction of the first connector 7, which increases the stability of the relative rotation between the first connector 7 and the second connector 1 and provides greater torsional strength.

[0057] In some embodiments, the interior of the second connector 1 is hollow to form a second inner cavity, and the second connector 1 is also provided with a cable sealing connector 3; specifically, the side wall of the second connector 1 is provided with a cable sealing connector 3, which allows the cable to pass through while maintaining a seal, and the cable sealing connector 3 can refer to existing structures. The first end of the first connector 7 is also provided with a signal connection end 10; a cable guide 9 is also provided in the first or second inner cavity. On the one hand, the cable can pass through the cable sealing connector 3, and the cable guide 9 is communicatively connected to the signal connection end 10 at the first end of the first connector 7, thereby realizing the signal transmission of the bridle. The cable guide 9 can be disposed in the second inner cavity, and the cable guide 9 is interference-fitted with the inner wall of the second inner cavity; furthermore, the cable guide 9 can be fixed within the portion of the second connector 1 that extends into the first inner cavity to shorten the extension length of the cable. The cable guide 9 can be a wired cable guide.

[0058] The cable guide 9 may include a first insulating sleeve 91, a signal conductor 94, and two signal transmission terminals 92. The first insulating sleeve 91 contacts and is fixed relative to the second inner cavity; optionally, the first insulating sleeve 91 and the cavity wall of the second inner cavity may be interference-fitted. The two signal transmission terminals 92 are respectively fixed to both ends of the first insulating sleeve 91. One signal transmission terminal 92 (the signal transmission terminal 92 on the right in the figure) can communicate with the signal connection terminal 10 or with the threaded rod 82 of the insulating inner plug 8; the other signal transmission terminal 92 (the signal transmission terminal 92 on the left in the figure) can communicate with the cable. The signal conductor 94 is fixed inside the first insulating sleeve 91; optionally, the signal conductor 94 may be threaded or interference-fitted with the inner wall of the first insulating sleeve 91. Both ends of the signal conductor 94 are respectively communicated with the two signal transmission terminals 92. Optionally, the end of the signal conductor 94 can directly contact the signal transmission end 92, or a first spring 93 can be provided to achieve a communication connection through the signal transmission end 92, the first spring 93, and the signal conductor 94. With this configuration, the cable guide 9 has stable performance and can ensure stable signal transmission.

[0059] In some embodiments, an insulating internal connector 8 may also be provided within the first inner cavity to prevent accidental current conduction between different components, avoid problems such as short circuits and leakage, and ensure the safe operation of the electrical system. Simultaneously, the insulating internal connector 8 provides support and positioning for the cables, ensuring their correct position within the equipment and enhancing structural stability.

[0060] The insulating inner plug 8 may include an insulating component that contacts and is fixed relative to the first inner cavity, and a communication component that passes through the insulating component and is communicatively connected to the signal connection terminal 10 at the first end of the first connector 7. This allows the communication component to establish a communication connection between the cable and the signal connection terminal 10, while the insulating component provides insulation to prevent leakage or short circuits between the first connector 7 and the signal connection terminal 10.

[0061] like Figure 2As shown, the insulating inner connector 8 includes a first insulating ring 81, a second insulating sleeve 83, and a second insulating ring 84, which are arranged sequentially along the direction close to the signal connection end 92. The first insulating ring 81, the second insulating sleeve 83, and the second insulating ring 84 can be fixed relative to the cavity wall of the first inner cavity. Specifically, the first insulating ring 81, the second insulating sleeve 83, and the second insulating ring 84 can be interference-fitted with the cavity wall of the first inner cavity. The communication component includes a threaded rod 82 passing through the first insulating ring 81, a threaded cylinder 86 passing through the second insulating ring 84, and a second spring 85 disposed within the threaded cylinder 86. The signal connection end 10 is fixedly connected to the first end of the threaded cylinder 86. Specifically, the signal connection end 10 can be threadedly connected to the first end of the threaded cylinder 86. The first end of the threaded rod 82 is pressed against the side of the first insulating ring 81 opposite to the second insulating ring 84, and the first end of the threaded cylinder 86 is pressed against the side of the second insulating ring 84 opposite to the first insulating ring 81. The second end of the threaded rod 82 is threadedly fixedly connected to the second end of the threaded cylinder 86. Specifically, both the second end of the threaded rod 82 and the second end of the threaded cylinder 86 extend into the second insulating sleeve 83 and are threadedly connected within the second insulating sleeve 83. By adjusting the relative position of the threaded rod 82 and the threaded cylinder 86, one end of the second spring 85 can contact the second end of the threaded rod, and the other end of the second spring 85 can contact the signal connection terminal. With this configuration, the signal from the signal connection terminal 10 can be transmitted to the cable guide 9 via the second spring 85 and the threaded rod 82. The threaded cylinder 86 can be formed of metal or insulating material, and the threaded rod 82 and the second spring 85 are formed of metal. The first insulating ring, the second insulating sleeve 83, and the second insulating ring 84 are all formed of insulating material, such as polyetheretherketone (PEEK).

[0062] To ensure a good seal, a second sealing ring 4 can be provided between the outer wall of the cable sealing joint 3 and the side wall of the second joint 1 to prevent sewage, dust, etc. from entering the quick connector through the gaps around the cable sealing joint 3.

[0063] In the above technical solution, the outer wall of the connecting sleeve 5 can be provided with a stepped groove, and the second connecting part of the first connector 7 is located in the stepped groove, so that the outer wall of the connector and the outer wall of the first connector 7 are flush, avoiding unevenness of the components between the weight rod and the bridle due to the setting of the quick connector, which would affect normal operation.

[0064] In some embodiments, such as Figure 1 As shown, the outer wall of the first connector 7 may be provided with a socket, so that the first connector 7 can be rotated by inserting a tool into the socket, so as to facilitate the assembly and disassembly of the first connector 7 from other components.

[0065] The outer wall of the second connector 1 may be provided with a socket, so that the second connector 1 can be rotated by inserting a tool into the socket, so as to facilitate the assembly and disassembly of the second connector 1 from other components.

[0066] In addition, to ensure the normal operation of the quick coupling, the overall tensile strength of the quick coupling must be ≥1080 N / mm². 2 The overall yield strength of the quick coupling is ≥930 N / mm². 2 .

[0067] This application also provides a clustering perforation tool string, which includes the quick connector provided in any of the above embodiments. The first connecting portion 701 of the first connector 7 of the quick connector is fixedly connected to the bridle, and the third connecting portion 101 of the second connector 1 of the quick connector is fixedly connected to the weight bar. Compared with the prior art, the beneficial effects of the clustering perforation tool string provided in this application embodiment are the same as those of the quick connector described above, and will not be repeated here.

[0068] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A quick connector characterized by, include: A first connector, wherein a first end of the first connector has a first connecting portion and a second end of the first connector has a second connecting portion; The second connector has a connecting sleeve rotatably connected to its first end, and the connecting sleeve can be threadedly connected to the second connecting part so that the first connector and the connecting sleeve can rotate together relative to the second connector; the second end of the second connector has a third connecting part.

2. The quick coupling of claim 1, wherein, The outer wall of the connecting sleeve has threads, the second connecting part has internal threads, and the connecting sleeve can be threadedly connected to the second connecting part; and / or the connecting sleeve includes a first sub-sleeve and a second sub-sleeve distributed radially thereon; the first sub-sleeve and the second sub-sleeve are detachably and fixedly connected.

3. The quick connector according to claim 1, characterized in that, The first connecting part is threaded, and the first connector is threaded to the bridle through the first connecting part; and / or, the third connecting part is threaded, and the second connector is threaded to the weight bar through the third connecting part; and / or, the outer walls of the first connector and / or the second connector are provided with insertion holes.

4. The quick connector according to claim 3, characterized in that, The outer wall of the first connecting part of the first connector is provided with a sealing groove for accommodating the sealing ring; and / or, the outer wall of the third connecting part of the second connector is provided with a sealing groove for accommodating the sealing ring. At least one retaining ring is provided in any of the sealing grooves, which fits against the sidewall of the sealing groove, and the height of the retaining ring is greater than the depth of the sealing groove.

5. The quick connector according to claim 1, characterized in that, The first connector has a hollow interior forming a first inner cavity. The first end of the second connector extends through the connecting sleeve into the first inner cavity, and a first sealing ring is provided between the second connector and the inner wall of the first inner cavity.

6. The quick connector according to claim 5, characterized in that, The second connector has a hollow interior forming a second inner cavity, and the second connector is also provided with a cable sealing connector; the first end of the first connector is also provided with a signal connection end; a cable guide is also provided in the first inner cavity or the second inner cavity; the cable can pass through the cable sealing connector and communicate with the cable guide.

7. The quick connector according to claim 6, characterized in that, The wire guide includes a first insulating sleeve that contacts and is fixed relative to the second inner cavity, two signal transmission ends that are fixed to both ends of the first insulating sleeve, and a signal conduction component fixed inside the first insulating sleeve. The two ends of the signal conduction component are respectively communicatively connected to the two signal transmission ends.

8. The quick connector according to claim 6, characterized in that, An insulating internal connector is also provided inside the first inner cavity; The insulating inner plug includes an insulating component that contacts and is fixed relative to the first inner cavity, and a communication component that passes through the insulating component and is communicatively connected to a signal connection terminal at the first end of the first connector.

9. The quick connector according to claim 8, characterized in that, The insulating component includes a first insulating ring, a second insulating sleeve, and a second insulating ring arranged sequentially along the direction close to the signal connection end; the communication component includes a threaded rod passing through the first insulating ring, a threaded cylinder passing through the second insulating ring, and a second spring disposed inside the threaded cylinder, and the signal connection end is fixedly connected to the first end of the threaded cylinder; The first end of the threaded rod is pressed against the side of the first insulating ring away from the second insulating ring, the first end of the threaded cylinder is pressed against the side of the second insulating ring away from the first insulating ring, the second end of the threaded rod is threadedly fixedly connected to the second end of the threaded cylinder, one end of the second spring is in contact with the second end of the threaded rod and the other end of the second spring is in contact with the signal connection end.

10. A clustered perforation tool string, comprising a bridle and a weighted rod, characterized in that, It also includes a quick connector as described in any one of claims 1-9, wherein the first connecting portion of the first connector of the quick connector is fixedly connected to the bridle, and the third connecting portion of the second connector of the quick connector is fixedly connected to the weight bar.

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