logging torpedo

Abstract

The present application relates to a kind of well logging torpedoes, including torpedo male head, torpedo female head and connecting ring, torpedo male head is used to connect with well logging hitches cable, torpedo female head is used to connect with drum cable head, torpedo male head and torpedo female head plug-in connection to realize the electrical connection between well logging hitches cable and drum cable head;Connecting ring is limit set in the outside of torpedo male head, and connecting ring can rotate relative to the torpedo male head, connecting ring is threadedly connected with torpedo female head, during the plug-in connection of torpedo male head and torpedo female head, the threadedly connected of connecting ring and torpedo female head can be realized by rotating connecting ring.The well logging torpedo of the present application has the advantage of easy disassembly, compared with prior art well logging torpedo, can greatly shorten the time of docking and disassembly.

Description

Technical Field

[0001] This invention belongs to the field of well logging instrument technology, and specifically relates to a well logging torpedo. Background Technology

[0002] A logging torpedo is an adapter connecting the cable of a logging bridle and the cable head on the drum, enabling safe and rapid docking between the bridle cable and the logging cable. Existing logging torpedoes consist of components such as a torpedo spring, locking nut, cone frame / cone, male plug, female plug, and torpedo casing. The torpedo head is divided into a male torpedo head and a female torpedo head. The female torpedo head is generally fabricated on the cable at the tail end of the bridle, while the male torpedo head is fabricated on the cable at the drum end. The fabrication steps for the female torpedo head are as follows: First, connect the torpedo spring and locking nut together. Then, pass the cable at the tail end of the bridle through the torpedo spring and cone frame / cone. After fixing the cone frame / cone to the cable with a hammer in a vise, strip the seven cable cores, insert the female insulation sleeve, and then attach the female plug to fabricate the female head. The manufacturing method for the male torpedo head is similar to that for the female head. The locking nut is replaced with the torpedo shell, and the female insulating sleeve and plug are replaced with the male insulating sleeve and plug. Everything else is the same. A section of steel wire is left at the cone of the male and female heads to make the ground wire. At this point, the manufacturing of the male and female torpedo heads is complete.

[0003] Existing logging torpedoes require a series of cumbersome steps during connection, including cleaning the cable core, connecting seven cable cores, securing with waxed rope, inserting into the casing, positioning with a top screw, sealing with silicone grease, and tightening with pipe wrenches. For the seven cable cores and one ground wire, existing logging torpedoes require eight pairs of male and female connectors, necessitating eight connections or disconnections per operation. Completing all operations takes at least 30 minutes, making the existing logging torpedoes extremely time-consuming to assemble and disassemble. Furthermore, repeated connection and disconnection of the cable cores can easily lead to loose connections or breaks at the cable core roots, directly affecting the acquisition of logging signals. Existing logging torpedoes require cleaning the cable cores with a cleaning agent before use, which can corrode hands, and the grease-like silicone grease removed during each cleaning has a negative environmental impact. The existing logging torpedoes have a cylindrical structure, so when assembling them with pipe wrenches, the wrenches can damage the cylindrical casing. These damaged areas become weak points prone to breakage during high-tension downhole operations. Summary of the Invention

[0004] In order to solve all or some of the above problems, the present invention aims to provide a logging torpedo. The logging torpedo of the present invention has the advantage of easy assembly and disassembly, and can greatly shorten the docking and disassembly time compared with the logging torpedo of the prior art.

[0005] According to one aspect of the present invention, a logging torpedo is provided, comprising a male torpedo head, a female torpedo head, and a connecting ring. The male torpedo head is used to connect with a logging bridle cable, and the female torpedo head is used to connect with a drum cable head. The male torpedo head and the female torpedo head are plugged together to achieve an electrical connection between the logging bridle cable and the drum cable head. The connecting ring is positioned outside the male torpedo head and is rotatable relative to the male torpedo head. The connecting ring is threadedly connected to the female torpedo head. During the plugging and connecting process of the male torpedo head and the female torpedo head, the threaded connection between the connecting ring and the female torpedo head can be achieved by rotating the connecting ring.

[0006] Furthermore, the male torpedo head includes a male housing, with a male connector threadedly and sealed to the male housing. The male connector is electrically connected to the logging bridle cable, and the logging bridle cable is fixed inside the male housing. The female torpedo head includes a female housing, with a female connector threadedly connected to the female housing. The female connector is electrically connected to the drum cable head, and the drum cable head is fixed inside the female housing. The male connector and the female connector are plugged into and sealed together. A connecting ring is positioned between the male housing and the male connector, and the connecting ring is threadedly connected to the female connector.

[0007] Furthermore, the male connector has a first protruding ring extending beyond the male housing, and a necking ring is provided at the upper end of the connecting ring. The connecting ring is limited between the male housing and the first protruding ring. The lower part of the connecting ring has a threaded hole, and the upper end of the female connector extending beyond the female housing has an external threaded portion. The connecting ring and the female connector are connected by a threaded connection through the mating of the threaded hole and the external threaded portion.

[0008] Furthermore, the upper end of the male connector is sealed with a first pressure-relieving rubber sleeve, and a lower male base and an upper male base are provided inside the first base composed of the lower male base and the upper male base. A first female socket is provided inside the first base, and a first double male connector is sealed inside the male connector. The lower end of the first double male connector is inserted and connected to the female connector, and the upper end of the first double male connector is inserted and connected to the first female socket. The logging bridle cable passes through the first pressure-relieving rubber sleeve and the first base and is electrically connected to the first female socket.

[0009] Furthermore, a first conical frame is provided inside the male housing, the first conical frame is fixed inside the male housing, a first cone is provided inside the first conical frame, the first cone is interference-fitted with the first conical frame, the logging bridle cable is interference-fitted with the first cone, the ground wire in the logging bridle cable is electrically connected to the male housing through the first conical frame and the first cone, the remaining cores of the logging bridle cable pass through the first conical frame, the first cone, the first pressure-relieving rubber sleeve and the first base and are electrically connected to the first female socket, the first cone includes a first outer cone and a first inner cone, the first outer cone is interference-fitted with the first inner cone, and the first outer cone is interference-fitted with the first conical frame; and / or,

[0010] The upper end of the male housing has a first semi-circular notch, and a first locking ring is connected to the first semi-circular notch by a screw. The first locking ring presses the logging bridle cable into the male housing. The ground wire in the logging bridle cable is electrically connected to the male housing and the first locking ring. The remaining cores of the logging bridle cable pass through the first pressure-relieving rubber sleeve and the first base and are electrically connected to the first female socket.

[0011] Furthermore, a first grease injection hole is provided on the male housing above the first pressure-relieving rubber sleeve, and the male connector is sealed to the first pressure-relieving rubber sleeve through the first rubber connector. A first countersunk screw hole is provided on the male housing, and a first countersunk screw that abuts against the male connector is connected in the first countersunk screw hole. A first buffer spring is fixedly connected to the upper end of the male housing.

[0012] Furthermore, a second pressure-relieving rubber sleeve is sealed to the lower end of the female connector. A lower female base and an upper female base are provided inside the second pressure-relieving rubber sleeve. A second female socket is provided inside the second base formed by the lower female base and the upper female base. A second double male connector is sealed inside the female connector. The upper end of the second double male connector is inserted into the double female socket. The double female socket is inserted into the male connector. The lower end of the second double male connector is inserted into the second female socket. The roller cable head passes through the second pressure-relieving rubber sleeve and the second base and is electrically connected to the second female socket.

[0013] Furthermore, a second conical frame is provided inside the mother housing, the second conical frame is fixed inside the mother housing, and a second cone is provided inside the second conical frame. The second cone is interference-fitted with the second conical frame, the roller cable head is interference-fitted with the second cone, the ground wire in the roller cable head is electrically connected to the mother housing through the second conical frame and the second cone, and the remaining cable cores of the roller cable head pass through the second conical frame, the second cone, the second pressure-relieving rubber sleeve, and the second base and are electrically connected to the second female socket. The second cone includes a second outer cone and a second inner cone, the second outer cone is interference-fitted with the second inner cone, and the second outer cone is interference-fitted with the second conical frame; and / or,

[0014] The lower end of the mother shell is provided with a second semi-circular notch, and a second locking ring is connected to the second semi-circular notch by screws. The second locking ring presses the roller cable head into the mother shell. The ground wire in the roller cable head is electrically connected to the mother shell and the second locking ring. The remaining cable cores of the roller cable head pass through the second pressure-relieving rubber sleeve and the second base and are electrically connected to the second female socket.

[0015] Furthermore, a second grease injection hole is provided on the female housing below the second pressure-relieving rubber sleeve, and the female connector is sealed to the second pressure-relieving rubber sleeve through the second rubber connector. A second countersunk screw hole is provided on the female housing, and a countersunk screw that abuts against the female connector is connected in the second countersunk screw hole. A second buffer spring is fixedly connected to the lower end of the female housing.

[0016] Furthermore, polygonal structures are provided on the outer walls of the male housing, the female housing, and the connecting ring; a positioning key is provided on the outer wall of the male connector, and a keyway that mates with the positioning key is fixedly connected to the female connector.

[0017] As can be seen from the above technical solution, the logging torpedo provided by the present invention has the following beneficial effects:

[0018] The male and female connectors of the logging torpedo of this invention are sintered integral parts. The 7 male pins are one unit, and the 7 female plugs are one unit. The docking method is the docking of two integrated male and female integral connectors. It only requires three steps: aligning the pins, tightening the quick ring, and tightening with a wrench. The operation can be completed in 30 seconds, which is convenient and quick.

[0019] The male casing, the female casing, and the outer wall of the connecting ring of the logging torpedo of the present invention are all provided with polygonal structures, which can be quickly completed using two deadbolts and can be safely and without damage to complete the fastening operation, thereby improving the safety of the logging torpedo in downhole operations.

[0020] The present invention provides a first locking ring at the tail end of the male housing and a second locking ring at the female housing, thereby enhancing the conductivity between the housing and the cable and improving grounding stability.

[0021] Compared with the prior art, the logging torpedo of the present invention omits the step of cleaning the cable core with a cleaning agent, thus avoiding the corrosive damage to the hands caused by chemical reagents. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a logging torpedo according to an embodiment of the present invention;

[0023] The attached figures are labeled as follows: 1. First buffer spring; 2. First locking ring; 3. First conical frame; 4. First pressure-relieving rubber sleeve; 5. Male housing; 6. Male connector; 7. First convex ring; 8. First double male connector; 9. Connecting ring; 10. Necking ring; 11. Female connector; 12. Double female socket; 13. First countersunk screw hole; 14. First screw positioning hole; 15. First grease injection hole; 16. Female housing; 17. Polygonal structure; 18. Second double male connector; 19. Second pressure-relieving rubber sleeve. Detailed Implementation

[0024] To better understand the purpose, structure, and function of this invention, a logging torpedo of this invention will be described in further detail below with reference to the accompanying drawings.

[0025] In response to the fact that existing logging torpedoes can no longer meet the requirements for operator health and safety, equipment stability, and work efficiency, and can no longer meet the needs of front-line production, this invention has made improvements in terms of employee health and safety, equipment stability, green environmental protection, high-quality development, and efficiency improvement. It aims to originate from the front line, serve the front line, and help the company achieve efficient and high-quality development.

[0026] Specifically, such as Figure 1 As shown, this invention illustrates a logging torpedo, comprising a male torpedo head, a female torpedo head, and a connecting ring 8. The male torpedo head is used to connect to a logging bridle cable, and the female torpedo head is used to connect to a drum cable head. The male and female torpedo heads are plugged together to achieve an electrical connection between the logging bridle cable and the drum cable head. The connecting ring 8 is positioned outside the male torpedo head and is rotatable relative to the male torpedo head. The connecting ring 8 is threadedly connected to the female torpedo head. During the plugging and connecting process of the male and female torpedo heads, the threaded connection between the connecting ring 8 and the female torpedo head can be achieved by rotating the connecting ring 8.

[0027] In this embodiment, the male torpedo connector is used to connect to the logging bridle cable, and the female torpedo connector is used to connect to the drum cable head. Alternatively, the male torpedo connector can be set to connect to the drum cable head, and the female torpedo connector can be set to connect to the logging bridle cable.

[0028] In this embodiment, the connecting ring 8 is positioned outside the male torpedo head and is threadedly connected to the female torpedo head. Alternatively, the connecting ring 8 can also be positioned outside the female torpedo head and threadedly connected to the male torpedo head.

[0029] In the embodiment where the connecting ring 8 is threadedly connected to the torpedo female head, during the assembly of the logging torpedo of this embodiment, the male torpedo head and the female torpedo head are plugged in and connected, while the connecting ring 8 is rotated to make the connecting ring 8 threadedly connected to the female torpedo head; during disassembly and assembly, the connecting ring 8 is rotated and the female torpedo head is pulled outwards. Therefore, compared with the logging torpedo of the prior art, the logging torpedo of this embodiment can greatly shorten the docking and disassembly time. Based on an annual land preparation and field operation volume of 200 wells, this embodiment can save about 200 hours of operation time required for connecting and disassembling the torpedo, thereby greatly improving the efficiency of docking and disassembly. Compared with the prior art, this embodiment only requires the connection ring 8 to be disassembled and assembled, without the need to remove the male and female plugs from the male or female torpedo head, thus eliminating the step of cleaning the cable core with cleaning agents, and correspondingly avoiding the corrosive damage to the hands caused by chemical reagents, as well as the negative impact of chemical reagents on the environment.

[0030] The torpedo male head includes a male housing 5, with a male connector 6 threadedly and sealed to the male housing 5. The male connector 6 is electrically connected to the logging bridle cable, which is fixed inside the male housing 5. The torpedo female head includes a female housing 14, with a female connector 9 threadedly connected to the female housing 14. The female connector 9 is electrically connected to the drum cable head, which is fixed inside the female housing 14. The male connector 6 and the female connector 9 are connected in a sealed plug-in manner. A connecting ring 8 is positioned between the male housing 5 and the male connector 6, and is threadedly connected to the female connector 9.

[0031] In this embodiment, the male housing 5 is threadedly connected to the male connector 6, the female housing 14 is threadedly connected to the female connector 9, the male connector 6 is electrically connected to the logging horse bridle cable, and the female connector 9 is electrically connected to the drum cable head. Therefore, the circuit can be made conductive after the male connector 6 and the female connector 9 are plugged in.

[0032] The male connector 6 has a first protruding ring 61 extending out of the male housing 5, and the upper end of the connecting ring 8 has a necking ring 81. The connecting ring 8 is limited between the male housing 5 and the first protruding ring 61. The lower part of the connecting ring 8 has a threaded hole, and the upper end of the female connector 9 extending out of the female housing 14 has an external thread. The connecting ring 8 and the female connector 9 are connected by the threaded hole and the external thread.

[0033] In this embodiment, the connecting ring 8 is limited between the male housing 5 and the first protruding ring 61. The arrangement of the male housing 5 and the first protruding ring 61 does not hinder the rotation of the connecting ring 8 relative to the male connector 6, thereby facilitating the threaded connection between the connecting ring 8 and the female connector 9 during the insertion and connection process of the male connector 6 and the female connector 9.

[0034] For the male connector 6, the upper end of the male connector 6 is sealed with a first pressure-relieving rubber sleeve 4. The first pressure-relieving rubber sleeve 4 is provided with a lower male base and an upper male base. The first base composed of the lower male base and the upper male base is provided with a first female socket. The male connector 6 is sealed with a first double male connector 7. The lower end of the first double male connector 7 is inserted and connected to the female connector 9. The upper end of the first double male connector 7 is inserted and connected to the first female socket. The logging horse bridle cable passes through the first pressure-relieving rubber sleeve 4 and the first base and is electrically connected to the first female socket.

[0035] In this embodiment, the first pressure-relieving rubber sleeve 4 serves to seal the male connector 6, thereby preventing mud from contaminating the internal structure of the male connector 6. Specifically, the male connector 6 is sealed to the first pressure-relieving rubber sleeve 4 via a first rubber connector. In this embodiment, the male connector 6, the first double male connector 7, and the first female socket are integrally formed by sintering.

[0036] In one embodiment, a first cone frame 3 is provided inside the male housing 5. The first cone frame 3 is fixed inside the male housing 5. A first cone is provided inside the first cone frame 3. The first cone and the first cone frame 3 are interference-fitted. The logging bridle cable is interference-fitted with the first cone. The ground wire in the logging bridle cable is electrically connected to the male housing 5 through the first cone frame 3 and the first cone. The remaining cores of the logging bridle cable pass through the first cone frame 3, the first cone, the first pressure-relieving rubber sleeve 4 and the first base and are electrically connected to the first female socket.

[0037] In this embodiment, both the first cone frame 3 and the first cone are made of conductive material. The first cone frame 3 is fixedly connected to the male housing 5, and the first cone and the first cone frame 3 are interference-fitted. During installation, the logging cable is passed through the first cone and the first cone frame 3, and then an external force, such as a hammer, is used to move the first cone into the first cone frame 3.

[0038] Regarding the first cone: The first cone includes a first outer cone and a first inner cone. The first outer cone and the first inner cone are interference-fitted, and the first outer cone is also interference-fitted with the first cone frame. Specifically, when fixing the cable, the outer layer of armor wire is stripped from the cable and passed through the first outer cone. Then, the second layer of armor wire is stripped and passed through the first inner cone. Finally, external force, such as a hammer, is used to force the first inner cone into the first outer cone.

[0039] Due to the limited inner diameter of the logging torpedo, in order to ensure normal communication under high temperature and high pressure, the male connector 6 and female connector 9 of this embodiment can only be made into 7-core. Therefore, in order to improve grounding stability, in this embodiment, the ground wire in the logging bridle cable is electrically connected to the male housing 5 through the first cone frame 3 and the first cone body made of metal. The remaining 7 cable cores of the logging bridle cable pass through the first cone frame 3, the first cone body, the first pressure-relieving rubber sleeve 4 and the first base and are electrically connected to the first female socket. The corresponding first double male connector 7 and the first female socket are both set as 7-core structures that cooperate with the 7 cable cores.

[0040] In one embodiment, the upper end of the male housing 5 is provided with a first semi-circular notch, and a first locking ring 2 is connected to the first semi-circular notch by screws. The first locking ring 2 presses the logging bridle cable into the male housing 5. The ground wire in the logging bridle cable is electrically connected to the male housing 5 and the first locking ring 2. The remaining cores of the logging bridle cable pass through the first pressure-relieving rubber sleeve 4 and the first base and are electrically connected to the first female socket.

[0041] In practice, the engagement of the first cone frame 3 and the first cone can be set simultaneously with the engagement of the first semi-circular notch and the first locking ring 2, so as to better fix the logging horse bridle cable; and the simultaneous setting of the two parts can also improve the grounding stability.

[0042] The aforementioned arrangement creates a relatively closed cavity between the first conical frame 3 and / or the first locking ring 2 and the first pressure-relieving rubber sleeve 4. In this embodiment, a first grease injection hole 13 is provided on the male housing 5 above the first pressure-relieving rubber sleeve 4. The first grease injection hole 13 is used to inject grease into the aforementioned cavity, thereby preventing mud from contaminating the structure inside the male connector 6.

[0043] For the first conical frame 3 and the male housing 5, the left end of the male housing 5 is provided with a constriction, and the first conical frame 3 is provided with a convex ring. The first conical frame 3 is limited within the male housing 5 by the cooperation of the convex ring and the constriction. Furthermore, the male housing 5 is provided with a first screw positioning hole 12. The male housing 5 and the first conical frame 3 are fixedly connected by positioning screws passing through the first screw positioning hole 12 and the corresponding hole on the first conical frame 3.

[0044] The male housing 5 is provided with a first countersunk screw hole 11, and a first countersunk screw that abuts against the male connector 6 is connected in the first countersunk screw hole 11. In this embodiment, the first countersunk screw hole 11 and the first countersunk screw are provided to prevent the male housing 5 from becoming loose from the male connector 6.

[0045] The upper end of the male housing 5 is fixedly connected to a first buffer spring 1. In this embodiment, the first buffer spring 1 is provided to protect the logging head cable located inside it.

[0046] For the female connector 9, the lower end of the female connector 9 is sealed with a second pressure-relieving rubber sleeve 17. The second pressure-relieving rubber sleeve 17 is provided with a lower female base and an upper female base. The second base composed of the lower female base and the upper female base is provided with a second female socket. The female connector 9 is sealed with a second double male connector 16. The upper end of the second double male connector 16 is inserted and connected to the double female socket 10. The double female socket 10 is inserted and connected to the male connector 6. The lower end of the second double male connector 16 is inserted and connected to the second female socket. The roller cable head passes through the second pressure-relieving rubber sleeve 17 and the second base and is electrically connected to the second female socket.

[0047] In this embodiment, the second pressure-relieving rubber sleeve 17 serves to seal the female connector 9, thereby preventing mud from contaminating the internal structure of the female connector 9. Specifically, the female connector 9 is sealed to the second pressure-relieving rubber sleeve 17 via a second rubber connector. In this embodiment, the female connector 9, the double female socket 10, the second double male connector 16, and the second female socket are integrally formed by sintering.

[0048] In one embodiment, a second cone frame is provided inside the mother housing 14 and fixed inside the mother housing 14. A second cone is provided inside the second cone frame and the second cone is interference-fitted with the second cone frame. The roller cable head is interference-fitted with the second cone. The ground wire in the roller cable head is electrically connected to the mother housing 14 through the second cone frame and the second cone. The remaining cable cores of the roller cable head pass through the second cone frame, the second cone, the second pressure-relieving rubber sleeve 17, and the second base and are electrically connected to the second female socket.

[0049] In this embodiment, both the second cone frame and the second cone are made of conductive material. The second cone frame is fixedly connected to the mother shell 14, and the second cone and the second cone frame are interference-fitted. During installation, the roller cable head is passed through the second cone and the second cone frame, and then an external force, such as a hammer, is used to move the second cone into the second cone frame.

[0050] Regarding the second cone: The second cone comprises a second outer cone and a second inner cone. The second outer cone and the second inner cone are interference-fitted, and the second outer cone is also interference-fitted with the second cone frame. When securing the cable, strip the outer layer of armor wire and pass the cable through the second outer cone. Then strip the second layer of armor wire and pass the cable through the second inner cone. Finally, use external force, such as a hammer, to force the second inner cone into the second outer cone.

[0051] Due to the limited inner diameter of the logging torpedo, in order to ensure normal communication under high temperature and high pressure, the male connector 6 and female connector 9 of this embodiment can only be made into 7-core. Therefore, in order to improve grounding stability, in this embodiment, the ground wire in the drum cable head is electrically connected to the mother shell 14 through the second cone frame and the second cone body made of metal. The remaining 7 cable cores of the drum cable head pass through the second cone frame, the second cone body, the second pressure-relieving rubber sleeve 17 and the second base and are electrically connected to the second female socket. The corresponding second double male connector 16, double female socket 10 and the second female socket are all set as 7-core structures that cooperate with the 7 cable cores.

[0052] In one embodiment, a second semi-circular notch is provided at the lower end of the mother housing 14. A second locking ring is connected to the second semi-circular notch by screws. The second locking ring presses the roller cable head into the mother housing 14. The ground wire in the roller cable head is electrically connected to the mother housing 14 and the second locking ring. The remaining cable cores of the roller cable head pass through the second pressure-relieving rubber sleeve 17 and the second base and are electrically connected to the second female socket.

[0053] In practice, the engagement of the second cone frame and the second cone body can be set simultaneously with the engagement of the second semi-circular notch and the second locking ring, so as to better fix the logging horse bridle cable; and the simultaneous setting of the two parts can also improve the grounding stability.

[0054] The aforementioned arrangement creates a relatively closed cavity between the second cone frame and / or the second locking ring and the second pressure-relieving rubber sleeve 17. In this embodiment, a second grease injection hole is provided on the female housing 14 below the second pressure-relieving rubber sleeve 17. The second grease injection hole is used to inject grease into the aforementioned cavity, thereby preventing mud from contaminating the structure inside the female connector 9.

[0055] The second cone frame and the mother shell 14 are provided with a constriction at the right end of the mother shell 14 and a convex ring on the second cone frame. The second cone frame is limited within the mother shell 14 by the cooperation of the convex ring and the constriction. Furthermore, the mother shell 14 is provided with a second screw positioning hole. The mother shell 14 and the second cone frame are fixedly connected by a second positioning screw passing through the second screw positioning hole and the corresponding hole on the second cone frame.

[0056] The female housing 14 is provided with a second countersunk screw hole, and a countersunk screw that abuts against the female connector 9 is connected in the second countersunk screw hole. In this embodiment, the second countersunk screw hole and the second countersunk screw are provided to prevent the female housing 14 from becoming loose from the female connector 9.

[0057] A second buffer spring is fixedly connected to the lower end of the mother shell 14. In this embodiment, the second buffer spring is provided to protect the logging cable located inside it.

[0058] In one embodiment, polygonal structures 15 are provided on the outer walls of the male housing 5, the female housing 14, and the connecting ring 8; a positioning key is provided on the outer wall of the male connector 6, and a keyway that mates with the positioning key is fixedly connected to the female connector 9.

[0059] The keyway and positioning key configuration in this embodiment facilitates the connection between the socket of the female connector 9 and the corresponding pin of the male connector 6. Alternatively, in a specific implementation, the keyway can be located on the male connector, and the positioning key on the female connector.

[0060] The polygonal structure 15 in this embodiment facilitates the use of wrenches, such as hex wrenches, for tightening operations, thus avoiding damage to the casing caused by the jaws of pipe wrenches. Furthermore, the use of hex wrenches eliminates the need for back-and-forth wrench adjustments, reducing operation time and improving efficiency. In this embodiment of the well logging torpedo, the inner diameter of the male casing 5, the female casing 14, and the connecting ring 8 are all 25.4 mm, and the outer diameter is 38 mm.

[0061] Regarding the logging torpedo of this invention, during specific installation:

[0062] Torpedo male connector: Pass the cable through the first buffer spring and the male housing in sequence, and fix it with the first cone frame and the first cone. After removing the braided layer and cleaning the cable core, pass the cable through the first pressure-relieving rubber sleeve, the first rubber connector, the lower male base, and after completing the crimping hole, pass it through the upper male base. Install the first base composed of the lower male base and the upper male base into the first rubber connector. Then put on the connecting ring, connect the male connector, screw on the male housing, position it with the set screw, install the first locking ring, and screw on the first buffer spring. This completes the fabrication of the torpedo male connector.

[0063] Torpedo female head: The manufacturing method is similar to that of the torpedo male head. The cable is passed through the second buffer spring and the female housing in sequence, and then fixed by the second cone frame and the second cone. After removing the braided layer and cleaning the cable core, the cable is passed through the second pressure-relieving rubber sleeve, the second rubber connector, the lower female base, and after completing the crimping hole, it is passed through the upper female base. The second base composed of the lower female base and the upper female base is installed into the second rubber connector. The female connector is connected, the female housing is screwed on, the set screw is used for positioning, the second locking ring is installed, and the second buffer spring is screwed on. The manufacturing of the torpedo male head is now complete.

[0064] The logging torpedo of this invention has the following advantages compared with the prior art:

[0065] 1. Integrated operation method, simple and quick operation: Existing logging torpedoes require a single pair of male and female plugs for insertion and removal. With 7 cable cores and 1 ground wire, there are a total of 8 pairs of male and female plugs, requiring 8 connections or insertions / removals. Furthermore, existing logging torpedoes require cleaning and sorting of each cable core before operation, followed by a series of operations including connection, wax rope binding, insertion into the torpedo casing, pin alignment, tightening the torpedo spring, tightening the set screw, checking connectivity, applying silicone grease, tightening with a pipe wrench, and installing the plug. Each connection / removal takes at least 30 minutes to complete. In contrast, the male and female connectors of this invention's logging torpedo are sintered integral parts. The 7 male pins form one unit, and the 7 female plugs form one unit. The connection method is the connection of two integrated male and female integral connectors, requiring only three steps: pin alignment, tightening the quick-release ring, and tightening with a wrench. The operation can be completed in 30 seconds, making it convenient and quick.

[0066] 2. Features a polygonal structure for ease of operation: Traditional torpedo casings are circular, requiring a pipe wrench for tightening before downhole operations. Due to the smooth surface, the wrench is difficult to grip, necessitating multiple attempts and resulting in low efficiency. Furthermore, the wrench teeth can easily damage the torpedo casing, causing minor issues like cracks leading to silicone grease leakage. Insufficient grease can allow mud to enter and affect the insulation of the male and female connectors. More serious issues include reduced casing safety load, making these cracks vulnerable points during high-tension downhole operations. In contrast, the logging torpedo of this invention features polygonal structures on the outer walls of the male and female casings and the connecting ring. This allows for quick and safe tightening using only two die-cast wrenches, significantly improving the safety of downhole operations.

[0067] 3. The setting of the first and second locking rings enhances the conductivity between the shell and the cable, thereby improving grounding stability: Due to the limited inner diameter of the logging torpedo, in order to ensure normal communication under high temperature and high pressure, the sintered part can only be made into 7 cores. In order to improve grounding stability, the first locking ring is set at the tail end of the male shell and the second locking ring is set at the female shell, thereby enhancing the conductivity between the shell and the cable and improving grounding stability.

[0068] 4. The logging torpedo of this invention can be matched with existing stock materials, achieving double cost reduction and efficiency improvement: Adhering to the principle of cost-saving, and in order to be compatible with the inner diameter of the existing 2-3 / 8” caliper head and the inner diameter of the "NO-GO" ring of the retrieval tool, as well as the compatibility of the cone-shaped frame, the inner and outer diameters of the logging torpedo in this invention are consistent with the dimensions of ordinary torpedoes. This allows it to be matched with existing stock materials, avoiding material waste caused by the inability to use old materials with new equipment. Simultaneously, the logging torpedo of this invention can avoid damage to the male and female pins during insertion and removal, reducing the cost of remanufacturing and achieving energy saving and efficiency improvement.

[0069] 5. No need to use chemical reagents to clean silicone grease, thus ensuring the safety of employees' hands: The old structure has silicone grease covering the cable core, which requires cleaning with ECC cleaning agent every time it is connected and disassembled. ECC is a chemical reagent that can cause certain corrosive damage to the hands. The logging torpedo of this embodiment omits this step.

[0070] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0071] Furthermore, the terms "a," "two," etc., 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. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0072] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 invention according to the specific circumstances.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. 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 logging torpedo, characterized in that, The device includes a male torpedo connector, a female torpedo connector, and a connecting ring. The male torpedo connector is used to connect to a logging bridle cable, and the female torpedo connector is used to connect to a drum cable head. The male and female torpedo connectors are plugged into each other to achieve an electrical connection between the logging bridle cable and the drum cable head. The connecting ring is positioned outside the male torpedo connector and is rotatable relative to the male torpedo connector. The connecting ring is threadedly connected to the female torpedo connector. During the plugging and connecting process of the male and female torpedo connectors, the threaded connection between the connecting ring and the female torpedo connector is achieved by rotating the connecting ring. The torpedo male head includes a male housing, with a male connector threadedly and sealed to the male housing. The male connector is electrically connected to the logging bridle cable, which is fixed inside the male housing. The torpedo female head includes a female housing, with a female connector threadedly connected to the female housing. The female connector is electrically connected to the drum cable head, which is fixed inside the female housing. The male connector and the female connector are connected in a sealed plug-in configuration. A connecting ring is positioned between the male housing and the male connector, and is threadedly connected to the female connector. The upper end of the male connector is sealed with a first pressure-relieving rubber sleeve. A lower male base and an upper male base are provided inside the first base formed by the lower male base and the upper male base. A first female socket is provided inside the first base. A first double male connector is sealed inside the male connector. The lower end of the first double male connector is inserted and connected to the female connector. The upper end of the first double male connector is inserted and connected to the first female socket. The logging bridle cable passes through the first pressure-relieving rubber sleeve and the first base and is electrically connected to the first female socket.

2. The logging torpedo according to claim 1, characterized in that, The male connector has a first protruding ring extending beyond the male housing, and a necking ring is provided at the upper end of the connecting ring. The connecting ring is limited between the male housing and the first protruding ring. The lower part of the connecting ring has a threaded hole, and the upper end of the female connector extending beyond the female housing has an external threaded portion. The connecting ring and the female connector are connected by the mating thread of the threaded hole and the external threaded portion.

3. The logging torpedo according to claim 1, characterized in that, A first conical frame is provided inside the male housing, and the first conical frame is fixed inside the male housing. A first cone is provided inside the first conical frame, and the first cone is interference-fitted with the first conical frame. The logging bridle cable is interference-fitted with the first cone. The ground wire of the logging bridle cable is electrically connected to the male housing through the first conical frame and the first cone. The remaining cores of the logging bridle cable pass through the first conical frame, the first cone, the first pressure-relieving rubber sleeve, and the first base and are electrically connected to the first female socket. The first cone includes a first outer cone and a first inner cone. The first outer cone is interference-fitted with the first inner cone, and the first outer cone is interference-fitted with the first conical frame; and / or, The upper end of the male housing has a first semi-circular notch, and a first locking ring is connected to the first semi-circular notch by a screw. The first locking ring presses the logging bridle cable into the male housing. The ground wire in the logging bridle cable is electrically connected to the male housing and the first locking ring. The remaining cores of the logging bridle cable pass through the first pressure-relieving rubber sleeve and the first base and are electrically connected to the first female socket.

4. The logging torpedo according to claim 3, characterized in that, A first grease injection hole is provided on the male housing above the first pressure-relieving rubber sleeve. The male connector is sealed to the first pressure-relieving rubber sleeve through the first rubber connector. A first countersunk screw hole is provided on the male housing. A first countersunk screw that abuts against the male connector is connected in the first countersunk screw hole. A first buffer spring is fixedly connected to the upper end of the male housing.

5. The logging torpedo according to claim 1, characterized in that, The lower end of the female connector is sealed with a second pressure-relieving rubber sleeve. A lower female base and an upper female base are provided inside the second pressure-relieving rubber sleeve. A second female socket is provided inside the second base formed by the lower female base and the upper female base. A second double male connector is sealed inside the female connector. The upper end of the second double male connector is inserted into the double female socket. The double female socket is inserted into the male connector. The lower end of the second double male connector is inserted into the second female socket. The roller cable head passes through the second pressure-relieving rubber sleeve and the second base and is electrically connected to the second female socket.

6. The logging torpedo according to claim 5, characterized in that, A second conical frame is provided inside the mother housing, and the second conical frame is fixed inside the mother housing. A second cone is provided inside the second conical frame, and the second cone is interference-fitted with the second conical frame. The roller cable head is interference-fitted with the second cone. The ground wire in the roller cable head is electrically connected to the mother housing through the second conical frame and the second cone. The remaining cable cores of the roller cable head pass through the second conical frame, the second cone, the second pressure-relieving rubber sleeve, and the second base and are electrically connected to the second female socket. The second cone includes a second outer cone and a second inner cone. The second outer cone is interference-fitted with the second inner cone, and the second outer cone is interference-fitted with the second conical frame; and / or, The lower end of the mother shell is provided with a second semi-circular notch, and a second locking ring is connected to the second semi-circular notch by screws. The second locking ring presses the roller cable head into the mother shell. The ground wire in the roller cable head is electrically connected to the mother shell and the second locking ring. The remaining cable cores of the roller cable head pass through the second pressure-relieving rubber sleeve and the second base and are electrically connected to the second female socket.

7. The logging torpedo according to claim 6, characterized in that, A second grease injection hole is provided on the female housing below the second pressure-relieving rubber sleeve. The female connector is sealed to the second pressure-relieving rubber sleeve through the second rubber connector. A second countersunk screw hole is provided on the female housing. A countersunk screw that abuts against the female connector is connected in the second countersunk screw hole. A second buffer spring is fixedly connected to the lower end of the female housing.

8. The logging torpedo according to claim 1, characterized in that, The outer walls of the male housing, the female housing, and the connecting ring are all provided with polygonal structures; the outer wall of the male connector is provided with a positioning key, and the female connector is fixedly connected with a keyway that mates with the positioning key.

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