Cyclic locking wire frame fixing device for downhole transient electromagnetic instrument

Abstract

The utility model discloses a downhole transient electromagnetic instrument circulation locking wire frame fixing device belongs to geophysical exploration equipment technical field, including connecting pipe no.

Description

Technical Field

[0001] This utility model relates to the field of geophysical exploration equipment technology, and in particular to a fixing device for the cyclic locking wire frame of a downhole transient electromagnetic instrument. Background Technology

[0002] Transient electromagnetic method (TEM) is an important tool in geophysical exploration and is widely used in resource exploration, geological structure detection, and hydrological engineering exploration. When conducting downhole exploration, TEM requires the use of a downhole transient electromagnetic instrument. The frame of the downhole transient electromagnetic instrument, including the transmitting frame and the receiving frame, is a key component for data acquisition and needs to be fixed and deployed in a specific manner. The downhole environment is characterized by narrow space and inconvenient operation. Large equipment must be disassembled into parts and transported to the work site, and then assembled on-site in the downhole environment.

[0003] Existing wireframe fixing devices mostly use simple plug-in or snap-fit ​​structures when assembled downhole. Although this connection method is acceptable for assembly, the structural robustness is insufficient. In the complex dragging or vibration environment downhole, the connection points are at risk of loosening, affecting the stability of the observation data. In addition, different observation tasks require different wireframe layout methods, such as overlapping loop observation or center loop observation. The existing fixing device has a fixed design structure and single function, making it difficult to flexibly switch on the same device or support multiple observation modes at the same time. This results in the need to carry multiple sets of equipment, reducing the efficiency of downhole operations.

[0004] Therefore, this utility model proposes a cyclic locking wire frame fixing device for downhole transient electromagnetic instruments to address the shortcomings of existing technologies. Utility Model Content

[0005] In view of the problems existing in the technology of the cyclic locking frame fixing device for downhole transient electromagnetic instrument, such as poor connection structure fixation, easy loosening during downhole operation and cumbersome disassembly and assembly process, as well as single function and difficulty in compatibility with multiple observation modes, this utility model aims to provide a downhole transient electromagnetic instrument cyclic locking frame fixing device with improved structure that can effectively solve the above problems.

[0006] This utility model provides a fixing device for the cyclic locking wire frame of a downhole transient electromagnetic instrument, including: a first connecting pipe, a second connecting pipe, a right-angle elbow, an inner end of a union, a union joint, an inner thread, an outer threaded end of a union, a fixing pipe, and an inner frame centering pipe.

[0007] The internal thread is provided inside the union.

[0008] Furthermore, one end of the first connecting pipe is connected to the right-angle elbow, and the other side of the right-angle elbow is connected to the inner end of the union. The outer wall of the inner end of the union penetrates the union. The external thread end of the union is installed inside the union by a thread and engages with the internal thread. The other end of the external thread end of the union is connected to the second connecting pipe. The second connecting pipe can be inserted into the inner wall of the first connecting pipe. The outer wall of the first connecting pipe is connected to the outer frame center-shaped component. The inner side of the outer frame center-shaped component is connected to the fixed pipe. The inner frame center-shaped pipe is installed at the center of the fixed pipe.

[0009] Preferably, the inner end of the union is installed in the groove of the right-angle elbow.

[0010] Preferably, the outer wall of the second connecting pipe matches the inner wall of the first connecting pipe.

[0011] Preferably, the external threaded end of the union is provided with a threaded groove, which rotates along the internal thread.

[0012] Preferably, the inner side of the irregular part in the outer frame is connected to the fixing tube.

[0013] Preferably, the connecting pipe, the right-angle elbow, and the fixing pipe are all made of PVC material.

[0014] Preferably, the right-angle elbow is used to connect the connecting pipe to the vertical inner end of the union.

[0015] Preferably, the fixing tube is used for the return line between the transmitting line and the receiving line.

[0016] Preferably, the first connecting pipe and the second connecting pipe are used to simultaneously fix the transmitting frame and the receiving frame.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problems of unstable connection structure, easy loosening and cumbersome disassembly and assembly in underground wire frame devices in the prior art by setting a union joint, internal thread and external thread end of the union joint, and using the external thread end of the union joint to tighten the thread with the internal thread inside the union joint. It achieves a firm connection, reliable locking and facilitates quick disassembly and assembly in the underground environment.

[0019] 2. This utility model solves the problem that the existing wire frame fixing device has a single function and cannot be compatible with multiple observation modes on the same device. It achieves high structural integration and can realize overlapping loop and center loop observation at the same time, thus improving the flexibility of operation. Attached Figure Description

[0020] Figure 1 This is a front view of the cyclic locking wire frame fixing device for the downhole transient electromagnetic instrument proposed in this utility model;

[0021] Figure 2 This is a partial structural disassembly diagram of the connecting pipe of the cyclic locking wire frame fixing device for the downhole transient electromagnetic instrument proposed in this utility model;

[0022] Figure 3 This is a partial structural diagram of the irregular component at the center of the outer frame of the cyclic locking wire frame fixing device for the downhole transient electromagnetic instrument proposed in this utility model.

[0023] Figure 4 This is a partial structural diagram of the live joint of the cyclic locking wire frame fixing device for the downhole transient electromagnetic instrument proposed in this utility model.

[0024] Legend:

[0025] 1. Connecting pipe one; 2. Right angle elbow; 3. Union inner end; 4. Union joint; 5. Internal thread; 6. Union external thread end; 7. Connecting pipe two; 8. Outer frame center irregular part; 9. Fixing pipe; 10. Inner frame center pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please refer to Figure 2 and Figure 4 This utility model embodiment provides a fixing device for the loop locking wire frame of a downhole transient electromagnetic instrument, including an inner union 3, a union 4, an internal thread 5, and an external thread end 6. The union 4 is designed as a hollow sleeve structure, and the internal thread 5 is integrally formed inside the union 4. The inner union 3 serves as a connector, and the outer wall of the inner union 3 penetrates the central hole of the union 4. One end of the inner union 3 is inserted into the groove of the right-angle elbow 2, and the other end of the right-angle elbow 2 is used to connect to the connecting pipe 1.

[0028] The outer wall of the external threaded end 6 of the union is machined with a threaded groove. The specification of the threaded groove matches the internal thread 5 inside the union 4. When assembling the outer frame, the external threaded end 6 of the union is connected to the second connecting pipe 7. The second connecting pipe 7 can be inserted into the inner wall of the first connecting pipe 1. At this time, the operator rotates the external threaded end 6 of the union or the union 4, and the threaded groove on the external threaded end 6 of the union will be axially screwed into the internal thread 5 inside the union 4 until it is rotated to the appropriate position. This ensures that the external threaded end 6 of the union can be firmly fixed in the union 4 by the thread, ensuring the structural rigidity and stability of the outer frame structure in the complex downhole working environment. It will not easily loosen due to vibration or dragging. At the same time, when it is necessary to disassemble the device, it is only necessary to rotate the external threaded end 6 of the union or the union 4 in the opposite direction to quickly release the lock and disassemble the outer frame, which greatly improves the deployment and recovery efficiency of the device in the downhole environment.

[0029] Connecting pipe 1 and right-angle elbow 2 serve as the basic load-bearing structure of the outer frame. They are made of PVC material. This material not only reduces manufacturing costs but, more importantly, provides good electrical insulation, avoiding eddy current interference from the metal frame to transient electromagnetic signals and ensuring the purity of the observation data. The design of right-angle elbow 2 connects the horizontally arranged connecting pipe 1 with the vertically installed union inner head 3, forming a three-dimensional corner structure of the outer frame. The sleeve structure where the outer wall of connecting pipe 2 7 matches the inner wall of connecting pipe 1 7 not only connects the external threaded end 6 of the union but also provides internal space or pipe wall support for the simultaneous layout of the transmitting and receiving frames, realizing the function of overlapping loops.

[0030] Please refer to Figure 2 and Figure 4 The locking structure consists of a right-angle elbow 2, an inner union 3, a union 4, an internal thread 5, and an external thread end 6. The right-angle elbow 2 is used to achieve a 90-degree angle connection of the connecting pipe 1. One end of the right-angle elbow 2 can be tightly inserted into the connecting pipe 1 using sealant to ensure the stability of the connection. The other side of the right-angle elbow 2 is also connected to the inner union 3 by insertion. The inner union 3 is installed in the groove of the right-angle elbow 2. The outer wall of the inner union 3 smoothly penetrates the union 4. The union 4 is a hollow pipe structure, and the interior of the union 4 is provided with an internal thread 5, which surrounds the inner wall of the union 4. The threaded structure features a threaded groove on the external threaded end 6 of the union. The external threaded end 6 is installed inside the union 4 via threads. The threaded groove of the external threaded end 6 engages with the internal thread 5. Rotating the external threaded end 6 or the union 4 causes the threaded groove on the external threaded end 6 to be axially screwed in or out along the internal thread 5 inside the union 4 until it is screwed into the appropriate position. This achieves a mechanical self-locking function, providing a more robust locking effect than ordinary plug-in connections. This ensures that the outer frame will not come loose accidentally in the complex environment of the well, and also facilitates quick disassembly and assembly by reverse rotation.

[0031] The other end of the external threaded end 6 of the union is connected to the second connecting pipe 7. The outer wall size of the second connecting pipe 7 matches the inner wall of the first connecting pipe 1. The second connecting pipe 7 can be inserted into the inner wall of the first connecting pipe 1 to form a sleeve structure. The first connecting pipe 1 and the second connecting pipe 7 together constitute the pipeline of the outer frame, which is used to fix the transmitting frame and the receiving frame at the same time, realizing the overlapping loop.

[0032] Please refer to Figure 1 and Figure 3 The center loop structure consists of an outer frame center-side irregular component 8, a fixing tube 9, and an inner frame center-side tube 10. The outer frame center-side irregular component 8 can be fixedly connected to the outer wall of the connecting tube 1 by integral injection molding or high-strength bonding. The inner side of the outer frame center-side irregular component 8 is connected to the fixing tube 9. The outer frame center-side irregular component 8 preferably has a V-shaped socket. The angle of the V-shaped socket is designed for inserting the fixing tube 9, so that the inner frame forms a stable rhomboid structure. The fixing tube 9 is tightly inserted and fixed in the outer frame center-side irregular component 8. The inner frame center-side tube 10 is installed at the center of the fixing tube 9, which facilitates the assembly and disassembly of the inner frame. This structure, which fixes the fixing tube 9 and the inner frame center-side tube 10 to the midpoint of the connecting tube 1 through the outer frame center-side irregular component 8, constitutes an independent and stable inner frame. The fixing tube 9 provides a loop path for the transmitting and receiving lines, enabling loop observation through the center.

[0033] As a preferred embodiment, in order to ensure the stability of the pipe bend connection, the inner fitting 3 is inserted into the groove of the right-angle elbow 2, which allows the pipe to bend while protecting the pipe connection.

[0034] In another preferred embodiment, to ensure the tightness of the outer frame structure connection and the stability of the overlapping loop, the outer wall size of connecting pipe 2 7 precisely matches the inner wall of connecting pipe 1, and connecting pipe 2 7 is inserted into the inner wall of connecting pipe 1. This sleeve structure makes the connection between the two pipe sections more stable and reliable. In another preferred embodiment, to achieve an effective threaded connection between the union 4 and the external thread end 6, the external thread end 6 is provided with a threaded groove. The tooth profile and pitch of the threaded groove precisely match the internal thread 5. When the external thread end 6 is rotated, the threaded groove will rotate axially along the internal thread 5, thereby achieving quick locking and positioning.

[0035] In another preferred embodiment, in order to form a stable structure for the inner frame, the inner side of the irregular part 8 at the center of the outer frame is connected to the fixing tube 9. The irregular part 8 at the center of the outer frame provides a stable connection point for the fixing tube 9, so that the inner frame can form a stable rhomboid support structure on the main frame.

[0036] As another preferred embodiment, in order to reduce material costs while meeting insulation performance requirements, the connecting pipe 1, the right-angle elbow 2, and the fixing pipe 9 are all made of low-cost PVC material, ensuring the electromagnetic compatibility of the device in the downhole environment.

[0037] As another preferred embodiment, the main function of the right-angle elbow 2 is to connect the horizontally oriented connecting pipe 1 to the vertically oriented inner joint 3, thereby realizing the spatial transition of the outer frame structure at the corner and the protection of the connecting pipe.

[0038] As another preferred embodiment, in order to realize the function of electromagnetic observation, the fixed tube 9, as the main component of the inner frame, is used for the return line of the transmitting line and the receiving line, which allows the receiving coil to be located at the center of the transmitting coil, realizing the observation mode of the center return line.

[0039] As another preferred embodiment, in order to realize the function of electromagnetic observation, connecting tube 1 and connecting tube 7 together constitute the main structure of the outer frame, which is used to fix the transmitting wire frame and the receiving wire frame at the same time. This makes the transmitting coil and the receiving coil located on the same plane and the same path, realizing the observation mode of overlapping loops.

[0040] Working principle:

[0041] When deploying equipment in an underground environment, the operator first assembles the components that form the outer frame. One end of the connecting pipe 1 connects to the right-angle elbow 2, and the other end of the right-angle elbow 2 connects to the inner union 3. The outer wall of the inner union 3 passes through the union 4. This step uses the right-angle elbow 2 to connect the connecting pipe 1 to the vertical inner union 3, forming the corner foundation of the outer frame. Then, the operator aligns the external thread end 6 of the union with the union 4. The union 4 has an internal thread 5, and the external thread end 6 has a threaded groove for mating. When the operator rotates the external thread end 6, the threaded groove on the external thread end 6 will rotate axially along the guide trajectory of the internal thread 5 inside the union 4. As the rotation continues, the thread engagement between the external thread end 6 and the union 4 becomes increasingly tight until it is rotated to the appropriate position, where the external thread end 6 is firmly locked inside the union 4.

[0042] This ensures that the entire outer frame will not come loose under underground vibration or dragging conditions, thus solving the problem of insufficient connection reliability in existing technologies;

[0043] While achieving locking, the other end of the external threaded end 6 of the live joint is connected to the second connecting pipe 7. The outer wall of the second connecting pipe 7 matches the inner wall of the first connecting pipe 1, allowing the second connecting pipe 7 to be smoothly inserted into the inner wall of the first connecting pipe 1, forming a sleeve structure. The outer frame pipeline formed by the first connecting pipe 1 and the second connecting pipe 7 is used to simultaneously fix the transmitting and receiving wire frames. By arranging the wire frames along the outer frame, overlapping loop observation can be achieved. At the same time, another function of the downhole transient electromagnetic instrument cyclic locking wire frame fixing device is achieved through the inner frame. The outer wall of the first connecting pipe 1 is connected to the outer frame's central non-linear component 8. The inner side of the midpoint anisotropic component 8 is connected to the fixed pipe 9. The inner frame midpoint pipe 10 is installed at the center of the fixed pipe 9. The outer frame midpoint anisotropic component 8, the fixed pipe 9 and the inner frame midpoint pipe 10 together form the inner frame located at the center of the outer frame. The transmitting line and the receiving line can be laid out through the fixed pipe 9, so that the downhole transient electromagnetic instrument cyclic locking frame fixing device can perform back-line observation at the center point. This solves the contradiction between the convenience of disassembly and assembly and the firmness of connection in the downhole. It integrates two observation functions: overlapping back-line and center back-line, and improves the working efficiency and measurement flexibility of the downhole transient electromagnetic instrument.

Claims

1. A fixing device for the loop locking wire frame of a downhole transient electromagnetic instrument, comprising: Connecting pipe one (1), connecting pipe two (7) and right angle elbow (2); Its features are, It also includes a union inner head (3), a union joint (4), an inner thread (5), a union outer thread end (6), an outer frame center irregular part (8), a fixing tube (9), and an inner frame center tube (10). One end of the connecting tube (1) is connected to the right angle elbow (2), and the other side of the right angle elbow (2) is connected to the union inner head (3). The outer wall of the union inner head (3) penetrates the union joint (4). The union (4) is provided with the internal thread (5), and the external thread end (6) of the union is installed in the union (4) by thread and cooperates with the internal thread (5). The other end of the external thread end (6) of the union is connected to the connecting pipe (7). The second connecting pipe (7) can be inserted into the inner wall of the first connecting pipe (1). The outer wall of the first connecting pipe (1) is connected to the outer frame center-shaped component (8). The inner side of the outer frame center-shaped component (8) is connected to the fixed pipe (9). The inner frame center-shaped pipe (10) is installed at the center of the fixed pipe (9).

2. The downhole transient electromagnetic instrument cyclic locking wire frame fixing device according to claim 1, characterized in that, The inner end of the union (3) is installed in the groove of the right-angle elbow (2).

3. The downhole transient electromagnetic instrument cyclic locking wire frame fixing device according to claim 1, characterized in that, The outer wall of the second connecting pipe (7) matches the inner wall of the first connecting pipe (1).

4. The downhole transient electromagnetic instrument cyclic locking wire frame fixing device according to claim 1, characterized in that, The external thread end (6) of the live connector is provided with a threaded groove, which rotates along the internal thread (5).

5. The downhole transient electromagnetic instrument cyclic locking wire frame fixing device according to claim 1, characterized in that, The inner side of the irregular part (8) in the outer frame is connected to two fixed tubes (9).

6. The downhole transient electromagnetic instrument cyclic locking wire frame fixing device according to claim 1, characterized in that, The connecting pipe (1), the right-angle elbow (2), and the fixing pipe (9) are all made of PVC.

7. The downhole transient electromagnetic instrument cyclic locking wire frame fixing device according to claim 1, characterized in that, The right-angle elbow (2) is used to connect the connecting pipe (1) to the vertical inner joint (3).

8. The downhole transient electromagnetic instrument cyclic locking wire frame fixing device according to claim 1, characterized in that, The fixed tube (9) is used for the return line of the transmitting line and the receiving line.

9. The downhole transient electromagnetic instrument cyclic locking wire frame fixing device according to claim 1, characterized in that, The first connecting tube (1) and the second connecting tube (7) are used to fix the transmitting frame and the receiving frame at the same time.

Images