An adaptive adjustment bracket for downhole transient electromagnetic data acquisition coils

Abstract

This utility model discloses an adaptive adjustment bracket for downhole transient electromagnetic data acquisition coils, relating to the field of coil adjustment bracket technology. It includes a threaded rod with a drive box sleeved on it. A base is fixed to the top surface of the drive box. Three equidistant inclined slots are formed on the circumference of the top surface of the base. Each of the three inclined slots has a second electric actuator ball-hinged to it. A mounting frame is ball-hinged to the telescopic end of the second electric actuator. Multiple first electric actuators are equidistantly mounted on the outer circumference of the mounting frame. A clamping assembly is fixed to the telescopic end of each first electric actuator. This utility model, through the cooperation of the first electric actuators and the clamping assembly, allows the bidirectional screw in the clamping assembly to rotate, driving two jaws to move in opposite directions, facilitating flexible adjustment of the clamping force according to the coil diameter. Ultimately, it solves the problems of existing brackets being unable to flexibly adjust the coil angle, position, and clamping force, unable to adapt to coils of different diameters, having low height adjustment efficiency, and being inconvenient to operate, thus improving the accuracy of exploration data and operational efficiency.

Description

Technical Field

[0001] This utility model relates to the field of coil adjustment support technology, and in particular to an adaptive adjustment support for downhole transient electromagnetic data acquisition coils. Background Technology

[0002] In downhole transient electromagnetic exploration, the stability and attitude accuracy of the data acquisition coil directly affect the accuracy and reliability of the exploration data. The downhole environment is complex, with problems such as narrow space, variable geological structure, and irregular well wall.

[0003] Existing coil supports often employ a fixed structure, making it difficult to flexibly adjust the coil's angle, position, and clamping force during installation according to actual downhole conditions. Fixed supports cannot accommodate coils of different diameters, and loosening or excessive compression during clamping can damage the coil and cause it to shift its orientation, affecting the quality of electromagnetic signal reception and acquisition. Furthermore, due to the uneven terrain downhole, supports are difficult to quickly adjust to a horizontal or specific tilt position, causing deviations in the relative position of the coil and the target detection area, resulting in data errors. In addition, the height adjustment of existing supports is mostly manual, which is inefficient and inconvenient to operate in complex downhole environments, failing to meet the needs of efficient exploration operations. Therefore, improvements are needed to address these issues. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an adaptive adjustment bracket for downhole transient electromagnetic data acquisition coils.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an adaptive adjustment bracket for downhole transient electromagnetic data acquisition coils, comprising a threaded rod, a drive box sleeved on the threaded rod, a base fixedly connected to the top surface of the drive box, three oblique slots equidistantly formed on the circumference of the top surface of the base, a second electric actuator spherically hinged in each of the three oblique slots, a mounting frame spherically hinged to the telescopic end of the second electric actuator, a plurality of first electric actuators equidistantly mounted on the outer circumference of the mounting frame, a clamping assembly fixedly connected to the telescopic end of the first electric actuator, and a coil clamped by the clamping assembly.

[0006] Preferably, the mounting bracket has three telescopic sleeves that are spherically hinged to the top surface of the mounting bracket, and the telescopic ends of the telescopic sleeves are spherically hinged to sliders. The outer wall of the threaded rod has multiple guide grooves that are used to guide the sliders to slide.

[0007] Preferably, a worm gear is rotatably provided inside the drive box, an internal threaded sleeve is fixedly connected inside the drive box and sleeved on the threaded rod, a worm wheel that meshes with the worm gear is coaxially fixedly connected to the internal threaded sleeve, and a motor that is coaxially fixedly connected to one end of the worm gear is installed on one side of the outer wall of the drive box.

[0008] Preferably, the clamping assembly includes a lead screw box, in which a bidirectional lead screw is rotatably disposed. A knob is rotatably disposed on the outer wall of one end of the lead screw box and is coaxially fixed to the bidirectional lead screw. Two grippers are sleeved on the two threaded sections of the bidirectional lead screw, and a coil is clamped between the clamping surfaces of the two grippers.

[0009] Preferably, a spring is installed inside the fixed sleeve of the telescopic sleeve, and one end of the spring abuts against a pressure sensor, which is installed on the bottom inner surface of the fixed sleeve of the telescopic sleeve.

[0010] Preferably, a mounting plate is fixed to the top of the threaded rod, four bolts are inserted at the four corners of the mounting plate, and multiple reinforcing plates that are fixed to the outer wall of the threaded rod are fixed to the bottom periphery of the mounting plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the cooperation of the first electric actuator and the clamping assembly, allows the bidirectional lead screw in the clamping assembly to rotate, driving the two jaws to move in opposite directions. This facilitates flexible adjustment of the clamping force according to the coil diameter, improving the adaptability and stability of the clamping, and thus enabling reliable fixing of coils of different specifications, avoiding loosening or excessive compression that could damage the coil. Furthermore, through the cooperation of the second electric actuator and the telescopic sleeve, the angle of the mounting frame can be quickly adjusted, improving the accuracy and efficiency of attitude adjustment, thereby enabling the coil to maintain a horizontal or specific tilt state in complex downhole environments. The cooperation of the motor, worm gear, and worm wheel facilitates automatic adjustment of the support height, improving operational convenience and efficiency, and enabling rapid adaptation to different downhole height requirements. Ultimately, this solves the problems of existing supports being unable to flexibly adjust the coil angle, position, and clamping force, unable to adapt to coils of different diameters, having low height adjustment efficiency, and being inconvenient to operate, thus improving the accuracy of exploration data and operational efficiency. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a first-view schematic diagram of the overall structure proposed in this utility model;

[0014] Figure 2 This is a second-view schematic diagram of the overall structure proposed in this utility model;

[0015] Figure 3 This is a schematic diagram of the overall structure of the present invention, which removes the coil and the threaded rod.

[0016] Figure 4This is a schematic cross-sectional view of the telescopic sleeve proposed in this utility model.

[0017] The numbers in the diagram are: 1. Coil; 2. Threaded rod; 3. Mounting bracket; 4. Telescopic sleeve; 5. First electric actuator; 6. Base; 7. Motor; 8. Second electric actuator; 9. Gripper; 10. Bidirectional lead screw; 11. Slider; 12. Worm gear; 13. Spring; 14. Pressure sensor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example: See Figures 1 to 4This utility model discloses an adaptive adjustment bracket for a downhole transient electromagnetic data acquisition coil, comprising a threaded rod 2, a drive box sleeved on the threaded rod 2, a base 6 fixedly connected to the top surface of the drive box, three equidistant inclined slots on the circumference of the top surface of the base 6, each of the three inclined slots having a second electric actuator 8 ball-hinged to it, a mounting bracket 3 ball-hinged to the telescopic end of the second electric actuator 8, and multiple first electric actuators 5 equidistantly mounted on the outer circumference of the mounting bracket 3, each first electric actuator 5 having a clamping assembly fixedly connected to its telescopic end, and a coil 1 clamped by the clamping assembly; the first electric actuators... Both the first electric actuator 5 and the second electric actuator 8 are from the TJC-C3 series. This series of electric actuators can provide stable and sufficient thrust to meet the force requirements for adjusting the installation position and angle of coil 1 in complex downhole environments. Their stroke range can be selected according to actual working conditions, adapting to various installation scenarios, while possessing good stability and precise telescopic control performance. Using the TJC-C3 series first electric actuator 5 and second electric actuator 8 allows for precise control of the telescopic amount, ensuring accurate adjustment. The above structure, in combination, forms the basic framework of the device, providing support for the coil. The mounting bracket 3 provides support for installation and multi-angle adjustment; three telescopic sleeves 4 are spherically hinged on the top surface of the mounting bracket 3, and sliders 11 are spherically hinged at the telescopic ends of the telescopic sleeves 4; multiple guide grooves are opened on the outer circumference of the threaded rod 2 to guide the sliding of sliders 11; the telescopic sleeves 4 are made of 45# steel, which has high strength and good wear resistance, and can stably support the mounting bracket; through the above structure, guidance and support are provided for the angle adjustment of the mounting bracket, ensuring the stability of the adjustment process; a worm gear 1 is rotatably installed inside the drive box. 2. An internal threaded sleeve is fixedly connected inside the drive box and fitted onto the threaded rod 2. A worm wheel that meshes with the worm 12 is coaxially fixedly connected to the internal threaded sleeve. A motor 7 is installed on one side of the outer wall of the drive box and coaxially fixed to one end of the worm 12. The model of the motor 7 is Y80M1-2. The worm 12 and the worm wheel are made of 20CrMnTi material. The worm 12 and the worm wheel made of 20CrMnTi material have high hardness and precise transmission, which can ensure the stability of height adjustment. Through the above structure, the automatic adjustment of the bracket height is realized, improving the operating efficiency and adjustment accuracy.

[0020] In this utility model, the clamping assembly includes a lead screw box, within which a bidirectional lead screw 10 is rotatably mounted. A knob, coaxially fixed to the bidirectional lead screw 10, is rotatably mounted on the outer wall of one end of the lead screw box. Two opposing jaws 9 are sleeved on the two threaded sections of the bidirectional lead screw 10, clamping a coil 1 between the clamping surfaces of the two jaws 9. The bidirectional lead screw 10 is made of 40Cr steel, which provides high strength and wear resistance, ensuring stable and accurate transmission. The jaws 9 are made of cast iron internally and wrapped with insulating rubber externally. This structure provides sufficient structural strength to stably clamp the coil 1 while preventing electromagnetic interference to the coil 1 through the external insulating rubber, and also prevents damage to the coil 1 surface during clamping. This structure enables reliable clamping of coils 1 of different diameters, improving the adaptability and safety of the device. A spring 13 is installed inside the fixed sleeve of the telescopic sleeve 4, with one end of the spring 13 abutting against a pressure transmitter. The pressure sensor 14 is installed on the bottom inner surface of the fixed sleeve of the telescopic sleeve 4; the spring 13 is made of 60Si2Mn alloy spring steel; the pressure sensor 14 is model ZCB511CF-W, which can accurately monitor pressure changes and provide timely feedback on whether the angle adjustment is abnormal; through the above structure, the pressure on the telescopic sleeve 4 can be monitored in real time, avoiding excessive angle adjustment that could damage the structure and improving the safety of the device; a mounting plate is fixed to the top of the threaded rod 2, and four bolts are inserted at the four corners of the mounting plate. Several reinforcing plates are fixed to the bottom periphery of the mounting plate and are fixed to the outer wall of the threaded rod 2; the threaded rod 2 is made of Q235 steel; the reinforcing plates are made of Q235 steel. The use of Q235 steel for the threaded rod 2 and the reinforcing plates enhances the stability and load-bearing capacity of the overall structure; through the above structure, the support is firmly installed, ensuring the stable operation of the device in the complex downhole environment.

[0021] Working Principle: In use, the bracket is first fixed to the designated position in the well using four bolts on the mounting plate at the top of the threaded rod 2. The reinforcing plate enhances the connection strength between the mounting plate and the threaded rod 2, ensuring the overall stability of the bracket. When coil 1 needs to be installed, the knob on the screw box in the clamping assembly is rotated, driving the bidirectional screw 10 to rotate. The two threaded sections of the bidirectional screw 10 drive the two grippers 9 to move in opposite directions, thereby clamping and fixing the coil 1. The extension and retraction of the first electric push rod 5 can adjust the position of the clamping assembly to adapt to the clamping requirements of different diameters of coil 1, ensuring... Ensure coil 1 is securely installed and avoid excessive compression. To adjust the angle of coil 1, activate the three second electric actuators 8. Depending on the desired angle, one second electric actuator 8 retracts while the other two extend, pushing the mounting bracket 3 to rotate around the inclined groove on the base 6 through different extension and retraction amounts. Simultaneously, the three telescopic sleeves 4 on the top surface of the mounting bracket 3 move synchronously with the rotation of the mounting bracket 3. The telescopic sleeve 4 corresponding to the retracted second electric actuator 8 extends, and the telescopic sleeve 4 corresponding to the extended second electric actuator 8 retracts. The slider 11 is in the guide groove of the threaded rod 2. The corresponding sliding action inside provides stable guidance and support for the rotation of the mounting frame 3. At this time, the spring 13 inside the fixed sleeve of the telescopic sleeve 4 will deform due to the extension and contraction of the telescopic sleeve 4. The pressure sensor 14 receives the pressure generated by the spring 13 and monitors the pressure on each telescopic sleeve 4 in real time to determine whether the angle of the mounting frame 3 is too large or abnormal. If the pressure exceeds the set range, it will promptly provide feedback and stop the adjustment to avoid excessive adjustment of the mounting frame 3 and damage to the structure. This ensures that the mounting frame 3 can be stably adjusted to a horizontal or specific tilt state, ensuring the accurate posture of the coil 1. If the height of the support needs to be adjusted, the motor 7 on the outer wall of the drive box is started. The motor 7 drives the worm 12 to rotate. The worm 12 meshes with the worm wheel on the internal thread sleeve, driving the internal thread sleeve to move up and down on the threaded rod 2, thereby driving the drive box and the entire upper structure to rise and fall, realizing the automatic adjustment of the support height. The operation is convenient and efficient, and can quickly adapt to different height requirements in the well. Through the coordinated work of each component, the coil 1 maintains a stable posture and accurate position in the complex downhole environment, improving the quality of electromagnetic signal acquisition and exploration efficiency. At this point, the device is in use.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An adaptive conditioning support for a downhole transient electromagnetic data acquisition coil comprising a threaded rod (2), characterized in that: A drive box is sleeved on the threaded rod (2), and a base (6) is fixedly connected to the top surface of the drive box. Three inclined slots are equally spaced on the top surface of the base (6). A second electric push rod (8) is ball-hinged in each of the three inclined slots. A mounting bracket (3) is ball-hinged to the telescopic end of the second electric push rod (8). Multiple first electric push rods (5) are equally spaced on the outer wall of the mounting bracket (3). A clamping assembly is fixedly connected to the telescopic end of the first electric push rod (5). A coil (1) is clamped by the clamping assembly of the first electric push rod (5).

2. The self-adjusting support for a downhole transient electromagnetic data acquisition coil of claim 1, wherein: The mounting bracket (3) has three telescopic sleeves (4) with inclined ball joints on the top periphery. The telescopic end of the telescopic sleeve (4) is ball jointed with a slider (11). The outer wall periphery of the threaded rod (2) has multiple guide grooves for guiding the slider (11) to slide.

3. The self-adjusting support for a downhole transient electromagnetic data acquisition coil of claim 2, wherein: The drive box is equipped with a worm gear (12) that rotates inside. The drive box is also equipped with an internal threaded sleeve that is fitted onto the threaded rod (2). The internal threaded sleeve is coaxially fixed with a worm wheel that meshes with the worm gear (12). A motor (7) is installed on one side of the outer wall of the drive box and is coaxially fixed with one end of the worm gear (12).

4. The self-adjusting support for a downhole transient electromagnetic data acquisition coil of claim 3, wherein: The clamping assembly includes a lead screw box, in which a bidirectional lead screw (10) is rotatably provided. A knob is rotatably provided on the outer wall of one end of the lead screw box and is coaxially fixed to the bidirectional lead screw (10). Two grippers (9) are sleeved on the two threaded sections of the bidirectional lead screw (10) in opposite directions. A coil (1) is clamped between the clamping surfaces of the two grippers (9).

5. The self-adjusting support for a downhole transient electromagnetic data acquisition coil of claim 4, wherein: A spring (13) is installed inside the fixed sleeve of the telescopic sleeve (4). One end of the spring (13) abuts against a pressure sensor (14), which is installed on the bottom surface of the fixed sleeve of the telescopic sleeve (4).

6. The self-adjusting support for a downhole transient electromagnetic data acquisition coil of claim 5, wherein: The threaded rod (2) is fixed to the top of the mounting plate, and four bolts are inserted at the four corners of the mounting plate. Multiple reinforcing plates are fixed to the bottom periphery of the mounting plate and are fixed to the outer wall of the threaded rod (2).

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