Steel pipe cable logging headstall

Abstract

The utility model provides a steel pipe cable logging bridle, which relates to the technical field of oil and gas field shaft measurement and adjustment and comprises a fishing head, a clasping device short section, a sealing short section, a signal connecting structure and a signal adapter which are sequentially connected. The fishing head, the clasping device short section, the sealing short section and the signal connection structure are all internally provided with containing cavities for cables to penetrate through in sequence. The fishing head comprises a body and an end arranged at the end of the body, and a step is arranged between the end and the body to form a fishing neck. A clasping device mounting cavity is formed in the clasping device short section, and a clasping device assembly is arranged in the clasping device mounting cavity; a sealing assembly mounting cavity is formed in the sealing short section, and an axial sealing assembly is arranged in the sealing assembly mounting cavity; the signal connection structure adopts a hollow structure, and a sealing material injection port communicated with the hollow structure is formed in the side wall of the signal connection structure; according to the utility model, a steel pipe cable entering a well can be reliably connected with an underground testing and adjusting instrument and the like, and signal transmission can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of wellbore measurement and adjustment in oil and gas fields, in particular to a steel pipe cable well logging bridle. Background Art

[0002] The bridle is an essential piece of logging equipment for wireline logging. During the entire logging process, the bridle effectively connects the logging cable and the logging instrument to complete the logging operation.

[0003] During the stratified measurement and adjustment process in oilfield gas injection wells, running measurement and adjustment instruments via conventional armored cables can lead to difficulties in wellhead sealing, failure of the blowout prevention system, and environmental pollution. However, running measurement and adjustment instruments down the well using steel pipe cables can significantly improve well control capabilities.

[0004] Therefore, there is an urgent need for an oil and gas field steel pipe cable logging bridle to reliably connect the steel pipe cable entering the well with the downhole test and adjustment instrument and realize signal transmission. Utility Model Content

[0005] The purpose of this utility model is to provide a steel pipe cable logging bridle to address the existing technical issues of difficulty in sealing the wellhead, failure of the blowout prevention system, and environmental pollution when running instrumentation through conventional armored cables. The various technical solutions provided by this utility model, including the preferred solution, are described below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The utility model provides a steel pipe cable logging bridle, comprising a fishing head, a gripper nipple, a sealing nipple, a signal connection structure and a signal adapter connected in sequence. The fishing head, the gripper nipple, the sealing nipple and the signal connection structure are all provided with a receiving cavity for sequentially passing the cable; wherein:

[0008] The fishing head includes a body and an end head provided at the end of the body, and a step is provided between the end head and the body to form a fishing neck;

[0009] The clinger nipple is provided with a clinger installation cavity, in which a clinger assembly is arranged; the sealing nipple is provided with a sealing assembly installation cavity, in which an axial sealing assembly is arranged;

[0010] The signal connection structure adopts a hollow structure, and its side wall is provided with a sealing material injection port connected to the hollow structure, and the injection port is blocked by a plugging wire with a sealing ring; the end of the signal adapter is provided with a signal connector.

[0011] Preferably, the clinger assembly comprises:

[0012] A jujube-shaped main body, with cross-shaped openings at both ends of the main body; and

[0013] The pressing rings are arranged at both ends of the main body, and a tapered hole is arranged in the pressing rings.

[0014] Preferably, a first locking member is further provided in the clamp installation cavity, and the first locking member is provided at the top of the clamp assembly.

[0015] Preferably, the first locking member comprises a screw structure, and the screw structure is provided with a through hole along the axial direction for the cable to pass through.

[0016] Preferably, the axial sealing assembly comprises a second locking member, a polytetrafluoroethylene ring and a bottom copper ring, wherein:

[0017] The second locking member includes a screw structure, and the screw structure is provided with a through hole along the axial direction for the cable to pass through;

[0018] The polytetrafluoroethylene ring is arranged between the second locking piece and the bottom copper ring.

[0019] Preferably, the fishing head and the clamping device pup joint, the clamping device pup joint and the sealing pup joint, the sealing pup joint and the signal connection structure, and the signal connection structure and the signal adapter are all connected through threads.

[0020] Preferably, a first internal thread is provided at the bottom of the fishing head, and a first external thread is provided at the top of the clamping device sub for mating with the first internal thread;

[0021] A second internal thread is provided at the bottom of the clamping nipple, and a second external thread is provided at the top of the sealing nipple for mating with the second internal thread;

[0022] The top of the signal connection structure is provided with an internal thread, the bottom is provided with a reverse internal thread, and the top of the signal adapter is provided with a reverse external thread.

[0023] Preferably, a protective cap is further included, which is arranged at the end of the signal adapter to protect the signal connector.

[0024] Preferably, the end adopts a conical structure, and the body adopts a columnar structure. The end with a larger diameter on the conical structure is the first end, and the first end is connected to the body. The diameter of the first end is larger than the diameter of the body.

[0025] Preferably, the fishing head, the clamping device short section, the sealing short section, the signal connection structure and the signal adapter are sealed by a radial seal.

[0026] The utility model provides a steel pipe cable logging bridle with a signal connector at the end of a signal adapter for connecting to a downhole test and adjustment instrument. The clamping assembly provided in the clamping nipple reliably secures the steel pipe cable, and the sealing assembly provided in the sealing nipple axially blocks the well pressure, preventing the well medium from entering the signal connection structure, thereby ensuring the connection between the end of the steel pipe cable in the signal connection structure and the signal adapter. Through the coordinated action of the successively connected fishing head, clamping nipple, sealing nipple, signal connection structure, and signal adapter, the steel pipe cable entering the well can be reliably connected to downhole test and adjustment instruments and achieve signal transmission during oil and gas field production logging and cable testing and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a structural diagram of an embodiment of the utility model steel pipe cable logging bridle;

[0029] Figure 2 yes Figure 1 Schematic diagram of the explosion structure;

[0030] Figure 3 yes Figure 1 A schematic diagram of a partial cross-sectional structure;

[0031] Figure 4 The utility model is a structural schematic diagram of a clamping device assembly in a steel pipe cable logging bridle.

[0032] In the figure: 1, fishing head; 10, body; 11, end; 111, first end; 12, fishing neck; 101, first internal thread;

[0033] 2. Clamping device short section; 20. Clamping device mounting cavity; 21. Clamping device assembly; 211. Main body; 212. Pressing ring; 22. First locking member; 201. First external thread; 202. Second internal thread;

[0034] 3. Sealing nipple; 30. Sealing assembly mounting cavity; 31. Axial sealing assembly; 311. Second locking member; 312. Polytetrafluoroethylene ring; 313. Bottom copper ring; 301. Second external thread;

[0035] 4. Signal connection structure; 40. Sealing material injection port; 41. Sealing ring; 42. Wire blocking; 401. Internal thread; 402. Reverse internal thread;

[0036] 5. Signal adapter; 52. Sealing plug; 501. External thread;

[0037] 6. Cable;

[0038] 7. Protective cap;

[0039] 8. Radial seals. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model depending on the specific circumstances.

[0043] Figure 1 Schematic diagram of the structure of this embodiment, Figure 2 yes Figure 1 Schematic diagram of the explosion structure, such as Figure 1 and Figure 2 As shown, this embodiment provides a steel pipe cable logging bridle, comprising a fishing head 1, a gripper sub 2, a sealing sub 3, a signal connection structure 4, and a signal adapter 5, which are connected in sequence. Each of the fishing head 1, the gripper sub 2, the sealing sub 3, and the signal connection structure 4 is provided with a receiving cavity for sequentially passing a cable 6.

[0044] The salvage head 1 includes a body 10 and an end head 11 disposed at the end of the body 10 . A step is provided between the end head 11 and the body 10 to form a salvage neck 12 for facilitating salvage operations.

[0045] In this embodiment, the end 11 adopts a conical structure and the body 10 adopts a columnar structure. The end with a larger diameter on the conical structure is the first end 111, which is connected to the body 10. The diameter of the first end 111 is larger than the diameter of the body 10.

[0046] Figure 3 yes Figure 1 A partial cross-sectional structural diagram of Figure 3 As shown, a clamping device installation cavity 20 is provided in the clamping device pup joint 2, and a clamping device assembly 21 is provided in the clamping device installation cavity 20. The clamping device assembly 21 is used to reliably fix the steel pipe cable so that the steel pipe cable entering the well can be reliably connected with the downhole test and adjustment instrument.

[0047] A sealing assembly installation cavity 30 is provided in the sealing nipple 3, and an axial sealing assembly 31 is provided in the sealing assembly installation cavity 30. The axial sealing assembly 31 is used to axially block the well pressure so that the medium in the well cannot enter the malachite cavity, so as to ensure the connection between the end of the steel pipe cable and the signal line of the downhole measurement and adjustment instrument.

[0048] The signal connection structure 4 is hollow, with a sealing material injection port 40 connected to the hollow structure on its sidewall. This port is sealed by a plug wire 42 with a sealing ring 41. In this embodiment, the sealing material is silicone grease, which ensures a seal and insulation within the hollow structure. The sealing material further effectively protects the cable 6, ensuring reliable signal transmission. The signal adapter 5 is provided with a signal connector at its end. In this embodiment, the signal connector is a signal pin, which is used to connect to the downhole test and adjustment instrument.

[0049] This steel pipe cable logging bridle features a signal connector at the end of a signal adapter 5 for connection to downhole testing and adjustment instruments. The gripper assembly 21 within the gripper sub 2 securely secures the steel pipe cable. The sealing assembly within the sealing sub 2 axially blocks well pressure, preventing wellbore media from entering the signal connection structure 4 and ensuring proper docking between the end of the steel pipe cable within the signal connection structure 4 and the signal adapter 5. Through the coordinated operation of the fishing head 1, gripper sub 2, sealing sub 3, signal connection structure 4, and signal adapter 5, the steel pipe cable 6 entering the well can be reliably connected to downhole testing and adjustment instruments, enabling signal transmission, during oil and gas field production logging and cable testing and adjustment processes.

[0050] As an optional implementation, Figure 4 is a structural diagram of the clamp assembly in this embodiment, as shown in Figure 4 As shown, the clamp assembly 21 includes a jujube-shaped main body 211 and a pressure ring 212, wherein "cross"-shaped openings are provided at both ends of the main body 211, and the pressure ring 212 is provided at both ends of the main body 211. A conical hole is provided in the pressure ring 212. When in use, the "cross"-shaped openings provided at both ends of the main body 211 can be squeezed by the pressure ring 212 to reduce the inner diameter of the main body 211, so that the steel pipe cable can be securely fixed therein.

[0051] In this embodiment, a first locking member 22 is also provided within the gripper mounting cavity 20 and is located at the top of the gripper assembly 21. Specifically, the first locking member 22 comprises a screw structure with an axially defined through-hole for cable insertion. During use, after the gripper assembly 21 is installed within the gripper mounting cavity 20, the first locking member 22 tightens the gripper assembly 21, reducing the inner diameter of the main body 211 and securely securing the steel tube cable therein, improving safety and stability during use.

[0052] As an optional embodiment, the axial seal assembly 31 includes a second locking member 311, a polytetrafluoroethylene ring 312, and a bottom copper ring 313. The second locking member 311 includes a screw structure with an axially defined through hole for cable insertion; the polytetrafluoroethylene ring 312 is disposed between the second locking member 311 and the bottom copper ring 313.

[0053] In this embodiment, the sealing assembly installation cavity 30 is a hollow cylindrical structure, and the axial sealing assembly 31 is installed with a polytetrafluoroethylene ring 312 and a bottom copper ring 313 from top to bottom, with clearance fit. By locking through the second locking piece 311, the inner and outer diameters of the polytetrafluoroethylene ring 312 can produce slight deformation, thereby improving the sealing effect.

[0054] As an optional embodiment, the fishing head 1 and the clamping short section 2, the clamping short section 2 and the sealing short section 3, the sealing short section 3 and the signal connection structure 4, and the signal connection structure 4 and the signal adapter 5 are all connected by threads, which are convenient for disassembly and assembly while meeting the connection and sealing effects.

[0055] Specifically, a first internal thread 101 is provided at the bottom of the salvage head 1, and a first external thread 201 is provided at the top of the clamping device short section 2 for cooperating and connecting with the first internal thread 101; a second internal thread 202 is provided at the bottom of the clamping device short section 2, and a second external thread 301 is provided at the top of the sealing short section 3 for cooperating and connecting with the second internal thread 202; an internal thread 401 is provided at the top of the signal connection structure 4, a reverse internal thread 402 is provided at the bottom, and a reverse external thread 501 is provided at the top of the signal adapter 5.

[0056] As an optional embodiment, a protective cap 7 is further included, which is provided at the end of the signal adapter 5 to protect the signal connector. A sealing plug 52 is also provided in the signal adapter 5 in this embodiment for leading out the signal line.

[0057] As an optional embodiment, the fishing head 1 , the gripper sub 2 , the sealing sub 3 , the signal connection structure 4 , and the signal adapter 5 are sealed by a radial seal 8 .

[0058] The radial seal in this embodiment adopts an O-ring. The O-ring is used to achieve radial sealing between the fishing head 1, the clamping device short section 2, the sealing short section 3, the signal connection structure 4, and the signal adapter 5 to improve the sealing performance of the overall structure, making the steel pipe cable logging bridle safer and more reliable when used.

[0059] The usage process of this embodiment is:

[0060] Disassemble the fishing head 1, gripper sub 2, sealing sub 3, signal connection structure 4, and signal adapter 5, which are connected in sequence, and set aside for later use. Pass the steel pipe cable through the fishing head 1, first locking member 22, gripper assembly 21, gripper mounting cavity 20, second locking member 311, polytetrafluoroethylene ring 312 and bottom copper ring 313, sealing assembly mounting cavity 30, and signal connection structure 4.

[0061] Use a cutter to pull out the inner insulation layer of the steel tube cable, about 2-3 cm in length. Be careful not to damage the insulation during the removal process. Remove the insulation layer to expose a portion of the copper conductor. Connect the copper conductor to the lead wire from the sealing plug 52 of the signal adapter 5. The lead wire should be long enough, at least 50 cm, and the insulation should be intact. Heat shrink tubing or other methods can be used to seal the copper conductor and the lead wire.

[0062] Adjust the cable end to about 5 cm from the lower end of the sealing nipple 3. Install the bottom copper ring 313 and the polytetrafluoroethylene ring 312 into the sealing assembly installation cavity 30 in sequence and secure them with the second locking member 311. Connect the gripper nipple 2 and the sealing nipple 3. Install the gripper assembly 21 into the gripper installation cavity 20 and secure it with the first locking member 22. Connect the fishing head 1 and the gripper nipple 2. Place the signal connection structure 4 close to the sealing nipple 3 and insert the excess wire into the signal connection structure 4, bringing the signal adapter 5 close to the signal connection structure 4.

[0063] Fix the signal adapter 5 and the sealing short section 3, and connect the signal adapter 5 and the sealing short section 3 by rotating the signal connection structure 4; inject sealing silicone grease into the signal connection structure 4 to ensure the sealing and insulation of the cavity, and seal it with a plug wire 42 with a sealing ring 41.

[0064] The various parts of this bridle are radially sealed by radial seals 8. Pay attention to the protection of the radial seals 8 when connecting. Before the bridle is connected to the downhole test and adjustment instrument, the signal adapter 5 needs to be equipped with a protective cap 7 to protect the signal pin connected to the downhole test and adjustment instrument.

[0065] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A steel pipe cable logging bridle, characterized in that: It includes a fishing head, a gripper nipple, a sealing nipple, a signal connection structure and a signal adapter connected in sequence. The fishing head, the gripper nipple, the sealing nipple and the signal connection structure are all provided with a receiving cavity for the cable to be passed through in sequence; wherein: The fishing head includes a body and an end head provided at the end of the body, and a step is provided between the end head and the body to form a fishing neck; The clinger nipple is provided with a clinger installation cavity, in which a clinger assembly is arranged; the sealing nipple is provided with a sealing assembly installation cavity, in which an axial sealing assembly is arranged; The signal connection structure adopts a hollow structure, and its side wall is provided with a sealing material injection port connected to the hollow structure, and the injection port is blocked by a plugging wire with a sealing ring; the end of the signal adapter is provided with a signal connector.

2. The steel pipe cable logging bridle according to claim 1, characterized in that: The clamp assembly includes: A jujube-shaped main body, with cross-shaped openings at both ends of the main body; and The pressing rings are arranged at both ends of the main body, and a tapered hole is arranged in the pressing rings.

3. The steel pipe cable logging bridle according to claim 2, characterized in that: A first locking member is also provided in the clamp installation cavity, and the first locking member is provided on the top of the clamp assembly.

4. The steel pipe cable logging bridle according to claim 3, characterized in that: The first locking member includes a screw structure, and the screw structure is provided with a through hole along the axial direction for the cable to pass through.

5. The steel pipe cable logging bridle according to any one of claims 1 to 4, characterized in that: The axial sealing assembly includes a second locking member, a polytetrafluoroethylene ring and a bottom copper ring, wherein: The second locking member includes a screw structure, and the screw structure is provided with a through hole along the axial direction for the cable to pass through; The polytetrafluoroethylene ring is arranged between the second locking piece and the bottom copper ring.

6. The steel pipe cable logging bridle according to any one of claims 1 to 4, characterized in that: The fishing head and the clamping device short section, the clamping device short section and the sealing short section, the sealing short section and the signal connection structure, and the signal connection structure and the signal adapter are all connected through threads.

7. The steel pipe cable logging bridle according to claim 6, characterized in that: The bottom of the fishing head is provided with a first internal thread, and the top of the clamping device short section is provided with a first external thread for matching and connecting with the first internal thread; A second internal thread is provided at the bottom of the clamping nipple, and a second external thread is provided at the top of the sealing nipple for mating with the second internal thread; The top of the signal connection structure is provided with an internal thread, the bottom is provided with a reverse internal thread, and the top of the signal adapter is provided with a reverse external thread.

8. The steel pipe cable logging bridle according to any one of claims 1 to 4, characterized in that: It also includes a protective cap, which is arranged at the end of the signal adapter to protect the signal connector.

9. The steel pipe cable logging bridle according to any one of claims 1 to 4, characterized in that: The end adopts a conical structure, and the body adopts a columnar structure. The end with a larger diameter on the conical structure is the first end, and the first end is connected to the body. The diameter of the first end is larger than the diameter of the body.

10. The steel pipe cable logging bridle according to any one of claims 1 to 4, characterized in that: The fishing head, the clamping device nipple, the sealing nipple, the signal connection structure, and the signal adapter are sealed by radial sealing members.

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