A downhole microseismic monitor

Abstract

The application discloses a downhole microseismic monitoring instrument and belongs to the technical field of seismic monitoring instruments. The downhole microseismic monitoring instrument comprises an upper cylinder shell, a lower cylinder shell is detachably connected to the bottom end of the upper cylinder shell, a bottom cone seat is fixed to the bottom of the lower cylinder shell, a camera is fixed to the upper bottom of the bottom cone seat, a plurality of searchlights are fixed to the circumference of the bottom cone seat, a triangular seat is detachably installed in the lower cylinder shell, a seismic detector is fixedly installed on the triangular seat, a positioning mechanism is installed in the upper cylinder shell and is used for positioning the installation position of the inner wall of the downhole, a cable is penetrated through the center of the upper end of the upper cylinder shell and is used for providing a power source, the downhole microseismic monitoring instrument integrates video monitoring, illumination and seismic detection and comprehensively covers various functions required by downhole operation; modular design and a quick release mechanism greatly simplify the field arrangement process and reduce the labor cost, and adjustable positioning screw pipes are arranged to ensure that stable support positioning can be obtained in different specifications of wellbores.

Description

Technical Field

[0001] This application relates to the field of seismic monitoring instruments, and more specifically, to a downhole microseismic monitoring instrument. Background Technology

[0002] In the process of mineral resource development, micro-seismic activity frequently occurs in underground operating sites such as coal mines, metal mines, and oil and gas fields. These weak but frequent vibrations may not only indicate potential geological disaster risks but also pose a threat to safe production. Traditional ground-based sensor network monitoring methods are insufficient to accurately capture subtle changes in deep underground strata. Existing seismic detectors, which are directly suspended underground by cables, suffer from unstable positioning and installation issues, failing to meet the requirements for high-precision, all-around monitoring. Therefore, we propose an underground microseismic monitoring instrument. Utility Model Content

[0003] 1. Technical problems to be solved The purpose of this application is to provide a downhole microseismic monitoring instrument that solves the technical problems mentioned in the background art, and realizes the integration of video monitoring, lighting and seismic detection, fully covering all the functions required for downhole operations; the modular design and quick release mechanism greatly simplify the on-site deployment process and reduce labor costs; and the adjustable positioning solenoid ensures stable support and positioning in wells of different specifications.

[0004] 2. Technical Solution This application provides a downhole microseismic monitoring instrument, comprising: an upper shell, a lower shell detachably connected to the bottom of the upper shell, a bottom cone fixed to the bottom of the lower shell, a camera fixed to the bottom of the bottom cone, and multiple searchlights fixed along the circumference of the bottom cone; a triangular base detachably installed inside the lower shell, on which a seismic detector is fixedly installed; a positioning mechanism installed inside the upper shell for positioning the installation position on the downhole inner wall; and a cable passing through the center of the upper end of the upper shell for providing a power source.

[0005] By adopting the above technical solution, the downhole microseismic monitoring instrument consists of a cylindrical structure composed of an upper shell, a lower shell, and a bottom cone. A seismic detector is installed inside the lower shell via a triangular base to receive vibration waves from different directions. The lower shell also protects the internal precision components. A camera and searchlight are centrally mounted on the bottom cone, enabling clear imaging of the site in dark environments, providing intuitive data analysis. Cables and positioning mechanisms are installed on the upper shell, allowing the entire device to be quickly and securely positioned in complex underground environments after being suspended to the required depth, improving ease of use and reliability. The cable design ensures a continuous and stable power supply. This downhole microseismic monitoring instrument is compact, easy to operate, highly accurate, and adaptable. It integrates image recording, light-assisted positioning, and precise positioning functions, effectively improving the safety and efficiency of underground engineering projects.

[0006] Optionally, flanges are fixed at the near ends of the upper and lower cylindrical shells, and multiple bolts are threaded between the upper and lower cylindrical shells.

[0007] By adopting the above technical solution, the upper and lower cylinder shells are connected by flanges and bolts, which ensures the stability of the structure and facilitates disassembly and reassembly during daily maintenance. At the same time, the sealing performance is good, preventing moisture and other impurities from entering the interior and affecting the normal operation of the circuit.

[0008] Optionally, three corner blocks are fixed to the inner wall of the lower cylinder shell, and a screw is threaded between the triangular seat and the corner blocks.

[0009] By adopting the above technical solution, three corner blocks are set on the inner side of the lower shell, which, together with the screw, tightly lock the triangular seat in the designated position, greatly improving the rigidity and impact resistance of the overall structure. The screw adjustment mechanism allows users to fine-tune the height of the triangular seat according to the actual situation to achieve the best working state of the seismic detector.

[0010] Optionally, the bottom cone base is uniformly fixed with multiple reinforcing strips along the cone surface, and the end faces of the searchlight and camera are both provided with transparent protective cover structures.

[0011] By adopting the above technical solution, several reinforcing ribs are added to the surface of the bottom cone base, which significantly improves the load-bearing capacity and durability of the material, thus enabling it to cope with harsh working conditions. The searchlight and camera are specially equipped with a high-strength transparent protective cover, which can effectively block the intrusion of dust particles and resist a certain degree of mechanical impact, ensuring that the imaging quality is not affected.

[0012] Optionally, the positioning mechanism includes a servo motor and a bracket fixed to the bottom of the upper cylinder shell. The output shaft of the servo motor is fixed with a bevel gear one. Four U-shaped rotating blocks are fixed on the upper surface of the bracket. Each U-shaped rotating block is equipped with a lead screw. Each lead screw is fixed with a bevel gear two. The bevel gear two is meshed with the bevel gear one. Each lead screw is threaded with a positioning screw tube, which movably penetrates the outside of the upper cylinder shell.

[0013] By adopting the above technical solution, when the servo motor is started, it will drive the first bevel gear to rotate, which in turn causes the four second bevel gears meshing with it to rotate simultaneously and transmit power to the lead screws connected to them, so that the corresponding positioning screws can extend or retract. In this way, the extension and retraction length of each positioning screw can be adjusted according to actual needs, thereby adapting to well hole sizes of different diameters and ensuring that the device is always in the best working posture.

[0014] Optionally, the upper cylinder shell is evenly provided with four insertion ports along the circumference, each of which is movably inserted into a positioning screw tube. The positioning screw tube is provided with a strip-shaped guide groove, and the end of the positioning screw tube away from the bevel gear is a conical head structure.

[0015] By adopting the above technical solution, four slots are specially opened around the upper shell to guide the sliding of the positioning screw, so as to ensure that the positioning screw can smoothly and linearly enter and exit. The free ends of the positioning screw are all processed into a conical shape, which helps to fit smoothly against the well wall, enhances the gripping force, and makes the whole positioning process more efficient and faster.

[0016] 3. Beneficial effects One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. It integrates video surveillance, lighting, and seismic detection, comprehensively covering all the functions required for downhole operations; 2. The modular design and quick release mechanism greatly simplify the on-site setup process and reduce labor costs. The adjustable positioning helical tube ensures stable support and positioning in wells of different specifications. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a downhole microseismic monitoring instrument disclosed in a preferred embodiment of this application; Figure 2 This is a cross-sectional structural diagram of the upper and lower shells of a downhole microseismic monitoring instrument disclosed in a preferred embodiment of this application; Figure 3 This application discloses a preferred embodiment of a downhole microseismic monitoring instrument. Figure 2 Enlarged structural diagram at point A in the middle; Figure 4This application discloses a preferred embodiment of a downhole microseismic monitoring instrument. Figure 2 Enlarged structural diagram at point B; The following are the labels in the diagram: 1. Upper shell; 11. Bolt; 12. Socket; 2. Lower shell; 21. Corner block; 3. Triangular seat; 31. Screw; 4. Seismic detector; 5. Bottom cone seat; 6. Searchlight; 7. Camera; 8. Positioning mechanism; 81. Servo motor; 82. Bracket; 821. U-shaped rotating block; 83. Lead screw; 84. Positioning screw tube; 841. Strip guide groove; 85. Bevel gear one; 86. Bevel gear two; 9. Cable. Detailed Implementation

[0018] The present application will be further described in detail below with reference to the accompanying drawings. Reference Figures 1 to 4 This application provides a downhole microseismic monitoring instrument, comprising: an upper shell 1, a lower shell 2 detachably connected to the bottom of the upper shell 1, a bottom cone 5 fixed to the bottom of the lower shell 2, a camera 7 fixed to the bottom of the bottom cone 5, and multiple searchlights 6 fixed around the circumference of the bottom cone 5; a triangular base 3 detachably installed inside the lower shell 2, a seismic detector 4 fixedly installed on the triangular base 3; a positioning mechanism 8 installed inside the upper shell 1 for positioning the installation position on the downhole inner wall; and a cable 9 passing through the center of the upper end of the upper shell 1 for providing power. This downhole microseismic monitoring instrument consists of a cylindrical structure composed of the upper shell 1, the lower shell 2, and the bottom cone 5. The seismic detector 4 is installed inside the lower shell 2 via the triangular base 3 to receive signals from different directions. The lower shell 2 protects the internal precision components from vibration waves. The bottom cone 5 houses the camera 7 and searchlight 6, which can clearly capture the scene in dark environments, providing intuitive data analysis. The upper shell 1 is equipped with a cable 9 and a positioning mechanism 8, enabling the entire device to be quickly and securely fixed in complex underground environments after being suspended to the required depth, improving ease of use and reliability. The cable 9 design ensures a continuous and stable power supply. This compact, easy-to-operate, highly accurate, and adaptable underground microseismic monitoring instrument integrates image recording, light-assisted positioning, and precise positioning functions, effectively improving the safety and efficiency of underground engineering.

[0019] Reference Figure 1 and Figure 2 Flanges are fixed at the near ends of the upper shell 1 and the lower shell 2, and multiple bolts 11 are threaded between the upper shell 1 and the lower shell 2. The upper shell 1 and the lower shell 2 are connected by flanges and bolts 11, which ensures the stability of the structure and facilitates disassembly and reassembly during daily maintenance. At the same time, the sealing performance is good, preventing moisture and other impurities from entering the interior and affecting the normal operation of the circuit.

[0020] Reference Figure 2 and Figure 3 Three corner blocks 21 are fixed to the inner wall of the lower cylinder shell 2. A screw 31 is threaded between the triangular seat 3 and the corner blocks 21. Three corner blocks 21 are set on the inner side of the lower cylinder shell 2. The screw 31, together with the screw, tightly locks the triangular seat 3 in the designated position, which greatly improves the rigidity and impact resistance of the overall structure. The screw 31 adjustment mechanism allows users to finely adjust the height of the triangular seat 3 according to the actual situation to achieve the best working state of the seismic detector 4.

[0021] Reference Figure 2 and Figure 3 The bottom cone base 5 has multiple reinforcing strips evenly fixed along the cone surface. The end faces of the searchlight 6 and camera 7 are equipped with transparent protective cover structures. By adding several reinforcing ribs to the surface of the bottom cone base 5, the load-bearing capacity and durability of the material are significantly improved, thus enabling it to cope with harsh working conditions. The searchlight 6 and camera 7 are specially equipped with high-strength transparent protective covers, which can effectively block dust particles from entering and resist a certain degree of mechanical impact, ensuring that the imaging quality is not affected.

[0022] Reference Figure 2 and Figure 4 The positioning mechanism 8 includes a servo motor 81 and a bracket 82 fixed to the bottom of the upper cylinder shell 1. The output shaft of the servo motor 81 is fixed with a bevel gear 85. Four U-shaped rotating blocks 821 are fixed on the upper surface of the bracket 82. Each U-shaped rotating block 821 is rotated by a lead screw 83. Each lead screw 83 is fixed with a bevel gear 86. The bevel gear 86 and the bevel gear 85 are meshed together. Each lead screw 83 is threaded with a positioning screw tube 84. The positioning screw tube 84 extends through the outside of the upper cylinder shell 1. When the servo motor 81 is started, it drives the bevel gear 85 to rotate, which in turn causes the four bevel gears 86 meshing with it to rotate simultaneously and transmit power to the lead screw 83 connected to each of them. This causes the corresponding positioning screw tube 84 to extend or retract. In this way, the extension and retraction length of each positioning screw tube 84 can be adjusted according to actual needs, thereby adapting to well hole sizes of different diameters and ensuring that the device is always in the best working posture.

[0023] Reference Figure 2 and Figure 4 The upper shell 1 has four slots 12 evenly arranged around its circumference, each for movably inserting a positioning screw tube 84. The positioning screw tube 84 has a strip-shaped guide groove 841 on its outside. The end of the positioning screw tube 84 away from the bevel gear 86 has a conical head structure. Four slots 12 are specially opened around the upper shell 1 to guide the sliding of the positioning screw tube 84, so as to ensure that the positioning screw tube 84 can smoothly and linearly enter and exit. The free ends of the positioning screw tube 84 are all processed into a conical shape, which helps to smoothly fit the well wall, enhance the gripping force, and make the entire positioning process more efficient and faster.

[0024] Working principle: The device is installed inside the lower cylinder shell 2 by positioning the seismic detector 4 with a triangular seat 3 and screw 31. The upper cylinder shell 1 and the lower cylinder shell 2 are connected by a flange and bolts 11. The bottom cone seat 5 is fixed at the bottom of the lower cylinder shell 2, forming a cylindrical structure. The device can be slowly lowered into the target wellbore using cable 9. The servo motor 81 drives the first bevel gear 85 to rotate, causing the four second bevel gears 86 to rotate simultaneously. The second bevel gears 86 then drive the corresponding lead screw 83 to rotate, forcing the positioning screw tube 84 on the lead screw 83 to extend outward to the top of the well wall, achieving a fast and stable positioning operation for the entire device. The searchlight 6 at the bottom illuminates the downhole environment, and the camera 7 starts working, transmitting back the image to the ground control center in real time. When a vibration is detected from the outside, the seismic detector 4 installed inside the lower cylinder shell 2 immediately responds and converts the analog signal into digital format and sends it out. The entire device is powered by an external power supply via cable 9, making it very suitable for long-distance remote control operation.

Claims

1. A downhole microseismic monitoring instrument, characterized in that: It includes: an upper shell (1), a lower shell (2) detachably connected to the bottom of the upper shell (1), a bottom cone seat (5) fixed to the bottom of the lower shell (2), a camera (7) fixed to the bottom of the bottom cone seat (5), and multiple searchlights (6) fixed along the circumference of the bottom cone seat (5), a triangular seat (3) detachably installed inside the lower shell (2), a seismic detector (4) fixedly installed on the triangular seat (3), a positioning mechanism (8) installed inside the upper shell (1) for positioning the installation position on the inner wall of the well, and a cable (9) passing through the center of the upper end of the upper shell (1) for providing a power source.

2. The downhole microseismic monitoring instrument according to claim 1, characterized in that: The upper shell (1) and the lower shell (2) are both fixed with flanges at their near ends, and multiple bolts (11) are threaded between the upper shell (1) and the lower shell (2).

3. The downhole microseismic monitoring instrument according to claim 1, characterized in that: The inner wall of the lower cylinder shell (2) is fixed with three corner blocks (21), and a screw (31) is threaded between the triangular seat (3) and the corner blocks (21).

4. The downhole microseismic monitoring instrument according to claim 1, characterized in that: The bottom cone base (5) is uniformly fixed with multiple reinforcing strips along the cone surface, and the end faces of the searchlight (6) and the camera (7) are both provided with transparent protective cover structures.

5. A downhole microseismic monitoring instrument according to claim 1, characterized in that: The positioning mechanism (8) includes a servo motor (81) and a bracket (82) fixed to the bottom of the upper cylinder shell (1). The output shaft of the servo motor (81) is fixed with a bevel gear (85). Four U-shaped rotating blocks (821) are fixed on the upper surface of the bracket (82). Each U-shaped rotating block (821) is rotated with a lead screw (83). Each end of the lead screw (83) is fixed with a bevel gear (86). The bevel gear (86) is meshed with the bevel gear (85). Each lead screw (83) is threaded with a positioning screw tube (84). The positioning screw tube (84) extends through the outside of the upper cylinder shell (1).

6. A downhole microseismic monitoring instrument according to claim 5, characterized in that: The upper cylinder shell (1) is evenly provided with four insertion ports (12) along the circumference, and a positioning screw tube (84) is movably inserted into each of them. The positioning screw tube (84) is provided with a strip guide groove (841) on the outside. The end of the positioning screw tube (84) away from the bevel gear (86) has a conical head structure.

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