Tandem downhole seismometer

Abstract

The application discloses a series type downhole seismograph device, which comprises a plurality of seismographs connected in series; each seismograph comprises a deep well strong seismograph, a plurality of righting support members and a plurality of stabilizing support members; the plurality of righting support members have at least an open state and a recovery state; when the righting support members are in the open state, at least part of the righting support members is moved to abut against the inner wall of a wellbore to support the deep well strong seismograph in a preset posture in the wellbore; when the righting support members are in the recovery state, the righting support members are moved to be separated from the inner wall of the wellbore; the plurality of stabilizing support members can be moved from a first position to a second position; when the stabilizing support members are moved to the first position, at least part of the stabilizing support members abuts against the inner wall of the wellbore; when the stabilizing support members are moved to the second position, the stabilizing support members are separated from the inner wall of the wellbore. The application solves the technical problem that the downhole righting and the effect of keeping the well stable of the series type deep well strong seismograph are poor.

Description

Technical Field

[0001] This invention relates to the field of engineering strong vibration measurement, and more particularly to a series downhole seismic measuring device, especially a series downhole seismic measuring device with uprighting and stabilizing functions after being lowered into the well. Background Technology

[0002] Currently, deep-well strong-motion seismographs can directly observe the seismic response deep within soil or rock masses, which is of great significance for the seismic safety of projects such as deep-buried tunnels and underground power plants. By comparing the measured data from deep-well strong-motion seismographs with those from surface strong-motion seismographs, the transmission coefficient of seismic motion can be analyzed, which has important scientific value for understanding the propagation laws of seismic waves.

[0003] One of the challenges of deep-well strong-motion observation is the accurate alignment and stability within the well, which involves accurately aligning the deep-well strong-motion instrument in both the horizontal and vertical directions (ensuring the tilt angle of the equipment is zero) to ensure that the deep-well strong-motion instrument can accurately measure the ground motion components in multiple directions (including at least the east-west, north-south, and vertical ground motion components).

[0004] The challenge in centering deep well strong seismic instruments lies in their placement in deep boreholes with small diameters (generally less than 200mm). To ensure successful placement, the outer diameter of the instrument is significantly limited, making it impossible to deploy large automated equipment. While centering devices exist for individual deep well strong seismic instruments, employing angle adjustment components and inclinometers for accurate centering, the high drilling costs and the substantial practical need for multiple tandem deep well strong seismic instruments in a single borehole mean that current centering devices for individual instruments cannot center tandem deep well strong seismic instruments. The main difficulty lies in the following:

[0005] 1) A single deep well strong seismic instrument is usually placed at the bottom of the well. The soil at the bottom of the well can support the stability of the equipment, so that the straightening can be carried out smoothly. However, a series deep well strong seismic instrument often has multiple instruments that need to be hung on the well wall. The bottom of the deep well strong seismic instrument is suspended in the air. Without the support of the soil, it is easy to shake, and the straightening effect cannot be guaranteed.

[0006] 2) In series deep well strong seismic instruments, there will be mutual influence between adjacent deep well strong seismic instruments. The order of straightening and stabilization between each deep well strong seismic instrument will have a great impact on the straightening effect. The mutual influence between each deep well strong seismic instrument is not conducive to the straightening process.

[0007] There is currently no effective solution to the problem of poor downhole alignment and well stability maintenance of tandem deep well strong seismic instruments in related technologies.

[0008] Therefore, based on years of experience and practice in related industries, the inventor proposes a series-connected downhole seismic monitoring device to overcome the shortcomings of existing technologies. Summary of the Invention

[0009] The purpose of this invention is to provide a series-connected downhole seismic monitoring device that can accurately acquire the attitude of each series-connected deep well strong seismograph in the well. It uses a straightening support to straighten any tilted deep well strong seismograph in the well, and a stabilizing support to fix the deep well strong seismograph at a preset position in the well. This ensures that each series-connected deep well strong seismograph is straightened and stably fixed in the well, without affecting its measurement, and guarantees that each series-connected deep well strong seismograph has a stable and accurate working state in the well.

[0010] The objective of this invention can be achieved through the following methods:

[0011] This invention provides a series-connected downhole seismic monitoring device, which includes multiple seismic monitoring devices arranged in series.

[0012] Each of the seismic measuring devices includes:

[0013] Deep well high-intensity seismograph;

[0014] Multiple centering supports are located on the deep well strong seismograph, and the multiple centering supports are arranged at intervals along the circumference of the deep well strong seismograph. The multiple centering supports have at least an open state and a retracted state. When the centering support is in the open state, at least a portion of the centering support moves radially away from the central axis of the well shaft until it abuts against the inner wall of the well shaft, so as to support the deep well strong seismograph in a preset posture within the well shaft. When the centering support is in the retracted state, the centering support moves radially towards the central axis of the well shaft until it separates from the inner wall of the well shaft.

[0015] Multiple stabilizing supports are located on the deep well strong seismometer, and the multiple stabilizing supports are arranged at intervals along the circumference of the deep well strong seismometer. The multiple stabilizing supports can move from a first position to a second position at least radially along the well shaft. When the stabilizing support moves away from the central axis of the well shaft to the first position, at least a portion of the stabilizing support abuts against the inner wall of the well shaft. When the stabilizing support moves towards the central axis of the well shaft to the second position, the stabilizing support separates from the inner wall of the well shaft.

[0016] In a preferred embodiment of the present invention, the series-connected downhole seismic monitoring device further includes a plurality of driving devices, each of which corresponds to a plurality of centralizing supports. The driving end of each driving device is connected to the corresponding centralizing support, and the driving device is used to drive the corresponding centralizing support to switch between the open state and the retracted state.

[0017] In a preferred embodiment of the present invention, the tandem downhole seismograph further includes a top plate located above the deep well strong seismometer, with an installation gap between the top plate and the top of the deep well strong seismometer. A plurality of the centering supports are located within the installation gap, and a plurality of the driving devices are disposed on the top of the top plate. When the centering support is in the extended state, at least a portion of the centering support moves to the outside of the installation gap and abuts against the inner wall of the wellbore. When the centering support is in the retracted state, the centering support moves into the installation gap and separates from the inner wall of the wellbore.

[0018] In a preferred embodiment of the present invention, the driving device is a drive motor;

[0019] The straightening support is a bent rod-shaped structure with a protruding support end in the middle. The bottom end of the straightening support is rotatably connected to the top of the deep well strong seismic instrument. The output shaft of the drive motor passes through the top plate and is connected to the top end of the straightening support. When the straightening support is in the extended state, the output shaft of the drive motor drives the straightening support to rotate until the support end of the straightening support is outside the installation gap and abuts against the inner wall of the wellbore. When the straightening support is in the retracted state, the output shaft of the drive motor drives the straightening support to rotate until the support end of the straightening support is inside the installation gap and separates from the inner wall of the wellbore.

[0020] In a preferred embodiment of the present invention, the driving device is a hydraulic cylinder;

[0021] The straightening support includes a first connecting rod and a second connecting rod. The bottom end of the second connecting rod is hinged to the top of the deep well strong seismic instrument, and the top end of the second connecting rod is hinged to the bottom end of the first connecting rod. The piston rod of the hydraulic cylinder passes through the top plate and is hinged to the top end of the first connecting rod. When the straightening support is in the extended state, the piston rod of the hydraulic cylinder extends downward, causing the top end of the first connecting rod to move downward to the hinge position between the first and second connecting rods, moving to the outside of the installation gap and abutting against the inner wall of the wellbore. When the straightening support is in the retracted state, the piston rod of the hydraulic cylinder retracts upward, causing the top end of the first connecting rod to move upward to the hinge position between the first and second connecting rods, moving to the inside of the installation gap and separating from the inner wall of the wellbore.

[0022] In a preferred embodiment of the present invention, the series-connected downhole seismograph further includes a tilt measuring device, which is disposed on the deep well strong seismometer and is used to detect the tilt angle of the deep well strong seismometer.

[0023] In a preferred embodiment of the present invention, the series-connected downhole seismic monitoring device further includes a controller, wherein the detection signal receiving end of the controller is electrically connected to the detection signal output end of the tilt measuring device, and the control signal output end of the controller is electrically connected to the control end of each of the drive devices.

[0024] In a preferred embodiment of the present invention, each of the seismic measuring devices is connected by a signal transmission cable, and the signal transmission cable is electrically connected to the controller.

[0025] In a preferred embodiment of the present invention, the series downhole seismic measuring device further includes a base disposed at the bottom of the deep well strong seismometer, and the base has a receiving groove on its side wall and along the circumference of the base, and a plurality of the stabilizing support members are disposed in the receiving groove in a radially movable manner along the wellbore.

[0026] The stabilizing support is a bent rod-shaped structure with a protruding support end in the middle. When the stabilizing support moves to the first position, the support end of the stabilizing support is located outside the receiving groove and abuts against the inner wall of the well shaft. When the stabilizing support moves to the second position, the support end of the stabilizing support is located inside the receiving groove and separates from the inner wall of the well shaft.

[0027] In a preferred embodiment of the present invention, a guide rail extending radially along the well shaft is provided on the top inner wall and / or bottom inner wall of the receiving groove, and the stabilizing support is slidably disposed on the guide rail.

[0028] In a preferred embodiment of the present invention, the deep well strong seismic instrument is a vertically arranged cylindrical shape, and the diameter of the deep well strong seismic instrument is smaller than the diameter of the well casing.

[0029] In a preferred embodiment of the present invention, the diameter of the deep well strong seismic instrument is greater than or equal to 70 mm and less than or equal to 110 mm.

[0030] The diameter of the wellbore is greater than or equal to 90 mm and less than or equal to 250 mm.

[0031] Based on the above, the features and advantages of the tandem downhole seismic monitoring device of the present invention are as follows:

[0032] In a series of deep-well strong-motion seismometers, each seismometer is equipped with multiple centralizing supports and multiple stabilizing supports arranged circumferentially along its length. The centralizing supports have at least two states: an open state and a retracted state. The stabilizing supports can move radially from a first position to a second position along the wellbore. When the centralizing support is in the retracted state, the stabilizing support moves towards the central axis of the wellbore to the second position. At this point, the centralizing support separates from the inner wall of the wellbore, and the stabilizing support also separates from the inner wall of the wellbore at the second position. Neither the centralizing nor the stabilizing supports contact the inner wall of the wellbore. This allows the series-connected deep-well strong-motion seismometers to be lowered into or removed from the wellbore, or their positions within the wellbore to be adjusted, without contact with the inner wall of the wellbore. Interference; When the straightening support is in the open state, the stabilizing support moves away from the central axis of the well to the first position. At this time, at least part of the straightening support moves to abut against the inner wall of the well, and at least part of the stabilizing support abuts against the inner wall of the well. The cooperation of multiple stabilizing supports can ensure the stable fixation of the deep well strong seismic instrument in the well. By adjusting the distance between the abutting position of each straightening support and the inner wall of the well, the angle of the deep well strong seismic instrument relative to the well (i.e., the tilt angle of the deep well strong seismic instrument) can be adjusted to straighten the tilted deep well strong seismic instrument in the well, and always ensure that each series of deep well strong seismic instruments is in a vertical position in the well, thereby ensuring that each series of deep well strong seismic instruments has a stable and accurate working state in the well, and will not affect the measurement of each deep well strong seismic instrument. Attached Figure Description

[0033] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0034] in:

[0035] Figure 1 This is a schematic diagram of the tandem downhole seismic monitoring device of the present invention in an un-downhole state.

[0036] Figure 2 This is a schematic diagram of the seismic measuring device in the series-connected downhole seismic measuring device of the present invention.

[0037] Figure 3 This is a schematic diagram of the tandem downhole seismic monitoring device of the present invention in the downhole straightening state.

[0038] The reference numerals in the accompanying drawings of this invention are:

[0039] 1. Seismic monitoring device; 101. Deep well strong-motion seismometer;

[0040] 102. Top slab; 103. Straightening support components;

[0041] 1031, First Link; 1032, Second Link;

[0042] 104. Inclination measuring device; 105. Drive device;

[0043] 106. Installation gap; 107. Base;

[0044] 1071. Receiving groove; 108. Stabilizing support component;

[0045] 2. Signal transmission cables; 3. Controller;

[0046] 4. Well shaft 5. Rotating shaft. Detailed Implementation

[0047] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0048] like Figures 1 to 3As shown, the present invention provides a series-connected downhole seismic monitoring device, which includes multiple seismic monitoring devices 1 arranged in series. Each seismic monitoring device 1 includes a deep well strong seismometer 101, multiple centering supports 103, and multiple stabilizing supports 108. The centering supports 103 are located at the top of the deep well strong seismometer 101 and are spaced apart and evenly distributed along the circumference of the deep well strong seismometer 101. The stabilizing supports 108 are located at the bottom of the deep well strong seismometer 101 and are spaced apart and evenly distributed along the circumference of the deep well strong seismometer 101. The centering supports 103 have at least an open state and a retracted state. When the centering supports 103 are in the open state, at least a portion of the centering supports 103 move radially away from the central axis of the wellbore 4 until they abut against the inner wall of the wellbore 4. The movement position of each centering support 103 relative to the wellbore is controlled. The inner wall of the wellbore 4 moves by different distances, so that each straightening support 103 cooperates to support the deep well strong seismic instrument 101 in a preset posture inside the wellbore 4; when the straightening support 103 is in the retracted state, the straightening support 103 moves radially along the wellbore 4 towards the direction closer to the central axis of the wellbore 4 until it separates from the inner wall of the wellbore 4; multiple stabilizing supports 108 can move at least radially along the wellbore 4 from a first position to a second position. When the stabilizing support 108 moves away from the central axis of the wellbore 4 to the first position, at least a portion of the stabilizing support 108 abuts against the inner wall of the wellbore 4; when the stabilizing support 108 moves towards the direction closer to the central axis of the wellbore 4 to the second position, the stabilizing support 108 separates from the inner wall of the wellbore 4.

[0049] In this invention, among the multiple deep-well strong seismographs 101 arranged in series, each deep-well strong seismograph 101 is equipped with multiple straightening support members 103 and multiple stabilizing support members 108 arranged circumferentially along the deep-well strong seismograph 101. The multiple straightening support members 103 have at least an open state and a retracted state, and the multiple stabilizing support members 108 can at least move from a first position to a second position along the radial direction of the wellbore 4. When the straightening support member 103 is in the retracted state, the stabilizing support member 108 moves towards the direction closer to the central axis of the wellbore 4 to the second position. In the second position, the straightening support 103 moves radially towards the central axis of the wellbore 4 until it separates from the inner wall of the wellbore 4, and the stabilizing support 108 also separates from the inner wall of the wellbore 4 in this second position. Neither the multiple straightening supports 103 nor the multiple stabilizing supports 108 will contact the inner wall of the wellbore 4. This allows the multiple series-connected deep well seismic instruments 101 to be lowered into or removed from the wellbore 4, or their positions within the wellbore 4 to be adjusted, without contacting the wellbore. Interference occurs on the inner wall of the wellbore 4; when the straightening support 103 is in the open state, the stabilizing support 108 moves to the first position away from the central axis of the wellbore 4. At this time, at least a portion of the straightening support 103 moves radially away from the central axis of the wellbore 4 until it abuts against the inner wall of the wellbore 4, and at least a portion of the stabilizing support 108 abuts against the inner wall of the wellbore 4. The cooperation of multiple stabilizing supports 108 can ensure the stable fixation of the deep well strong seismic instrument 101 within the wellbore 4. By adjusting each... The distance between the position of the straightening support 103 and the inner wall of the well 4 can adjust the angle of the deep well strong seismograph 101 relative to the well 4 (i.e., the tilt angle of the deep well strong seismograph 101). This allows for the straightening of the tilted deep well strong seismograph 101 within the well, ensuring that all the series-connected deep well strong seismographs 101 are in a vertical position within the well. This, in turn, ensures that each series-connected deep well strong seismograph 101 has a stable and accurate working state within the well, and does not affect the measurements of each deep well strong seismograph 101.

[0050] In a preferred embodiment of the present invention, each uprighting support 103 cooperates to support the deep well strong seismograph 101 in a preset posture within the wellbore 4, so that the deep well strong seismograph 101 is in a vertical posture within the wellbore 4. In this posture, the deep well strong seismograph 101 can accurately measure the seismic motion components in multiple directions (including at least three seismic motion components: east-west, north-south, and vertical), so as to ensure that the deep well strong seismograph 101 can accurately collect seismic motion data.

[0051] In an optional embodiment of the present invention, such as Figures 1 to 3As shown, the series-type downhole seismic monitoring device also includes multiple drive devices 105, each drive device 105 corresponding to a multiple straightening support 103. The drive end of the drive device 105 is connected to the corresponding straightening support 103, and the drive device 105 is used to drive the corresponding straightening support 103 to switch between the open state and the retracted state.

[0052] Furthermore, such as Figures 1 to 3 As shown, the tandem downhole seismograph also includes a top plate 102 located above the deep well strong seismometer 101. The top plate 102 is a flat plate of a certain thickness arranged horizontally. There is an installation gap 106 between the top plate 102 and the top of the deep well strong seismometer 101 (i.e., there is a gap between the bottom surface of the top plate 102 and the top of the deep well strong seismometer 101 without contact). The installation gap 106 is used to provide installation space for the uprighting support 103. Multiple stabilizing supports 108 are located within the installation gap 106, and multiple driving devices 105 are fixed. Located on the top of the top plate 102, when the straightening support 103 is in the open state, at least a portion of the straightening support 103 moves to the outside of the installation gap 106 and abuts against the inner wall of the well barrel 4; when the straightening support 103 is in the retracted state, the straightening support 103 moves into the installation gap 106 and is hidden. At this time, the straightening support 103 is separated from the inner wall of the well barrel 4, so as to avoid interference between the straightening support 103 and the inner wall of the well barrel 4 when the deep well strong seismic instrument 101 moves in the well barrel 4.

[0053] The top plate 102 and the deep well strong seismograph 101 can be connected by a stabilizing support 108. Of course, in order to ensure the stability of the connection between the top plate 102 and the deep well strong seismograph 101 and to prevent the stabilizing support 108 from being unable to move normally due to excessive tension between the top plate 102 and the deep well strong seismograph 101, other connecting structures can be added between the top plate 102 and the deep well strong seismograph 101 to realize the connection between the top plate 102 and the deep well strong seismograph 101. The specific connecting structure is not limited here, as long as it can fix the relative position between the top plate 102 and the deep well strong seismograph 101.

[0054] In one specific embodiment of the present invention, such as Figure 2 As shown, the drive device 105 is a drive motor, the main body of which is fixedly installed on the top of the top plate 102; the straightening support 103 is a bent rod-shaped structure with a protruding support end in the middle, the bottom end of which is rotatably connected to the top of the deep well strong seismic instrument 101; the output shaft of the drive motor passes through the top plate 102 and is connected to the top of the straightening support 103, so that the output shaft of the drive motor can drive the straightening support 103 along... Figure 2The rotating shaft 5 in the well rotates. When the straightening support 103 is in the open state, the output shaft of the drive motor drives the straightening support 103 to rotate until the support end of the straightening support 103 is outside the installation gap 106 and abuts against the inner wall of the well barrel 4; when the straightening support 103 is in the retracted state, the output shaft of the drive motor drives the straightening support 103 to rotate until the support end of the straightening support 103 is inside the installation gap 106 and separates from the inner wall of the well barrel 4, so as to control whether the deep well strong seismic instrument 101 is in the straightening state inside the well barrel 4 through the drive device 105.

[0055] In another specific embodiment of the present invention, such as Figure 2 As shown, the driving device 105 can also be a hydraulic cylinder, with the cylinder body fixedly installed on the top of the top plate 102; the straightening support 103 includes a first connecting rod 1031 and a second connecting rod 1032. The bottom end of the second connecting rod 1032 is hinged to the top of the deep well strong seismic instrument 101, and the top end of the second connecting rod 1032 is hinged to the bottom end of the first connecting rod 1031. The piston rod of the hydraulic cylinder passes through the top plate 102 and is hinged to the top end of the first connecting rod 1031. The piston rod of the drive motor can drive the top end of the first connecting rod 1031 to move up and down, thereby changing the angle between the first connecting rod 1031 and the second connecting rod 1032. When the straightening support 103 is in the spread-out state, the piston rod of the hydraulic cylinder extends downward, and the angle between the first connecting rod 1031 and the second connecting rod 1032 decreases (i.e., the opening between the first connecting rod 1031 and the second connecting rod 1032). The first link 1031 is reduced so that the top end of the first link 1031 moves downward to the hinge position of the first link 1031 and the second link 1032, and moves to the outside of the installation gap 106 and abuts against the inner wall of the well barrel 4. When the straightening support 103 is in the retracted state, the piston rod of the hydraulic cylinder retracts upward, and the included angle between the first link 1031 and the second link 1032 increases (i.e., the opening between the first link 1031 and the second link 1032 increases), so that the top end of the first link 1031 moves upward to the hinge position of the first link 1031 and the second link 1032 and moves into the installation gap 106 (to the maximum extent, it can drive the first link 1031 and the second link 1032 to move vertically to the same straight line) and separate from the inner wall of the well barrel 4, so as to control whether the deep well strong seismic instrument 101 is in the straightening state in the well barrel 4 through the drive device 105.

[0056] In the above embodiment, the driving device 105 is fixedly installed on the top surface of the top plate 102. Of course, the driving device 105 can also be fixedly installed on the side or bottom surface of the top plate 102. An installation space can even be provided in the top plate 102 to place the driving device 105 in the top plate 102, so as to achieve a stable installation of the driving device 105. The specific installation position and installation method of the driving device 105 are not specifically limited here.

[0057] In an optional embodiment of the present invention, such as Figures 1 to 3 As shown, the series-connected downhole seismograph also includes a tilt measuring device 104 and a controller 3. The tilt measuring device 104 is mounted on the deep well strong seismograph 101 and is used to detect the tilt angle of the deep well strong seismograph 101. The controller 3 can be mounted outside the wellbore 4. The detection signal receiving end of the controller 3 is electrically connected to the detection signal output end of the tilt measuring device 104, and the control signal output end of the controller 3 is electrically connected to the control end of each drive device 105. The tilt angle of each deep well strong seismograph 101 in the wellbore 4 is detected in real time by the tilt angle measuring device 104, and the detected signal is transmitted to the controller 3. The controller 3 determines the tilt degree and direction of the deep well strong seismograph 101 according to the tilt angle of different deep well strong seismographs 101. Then, the controller 3 controls the movement position of each straightening support 103 through multiple drive devices 105 on the deep well strong seismograph 101, so that each straightening support 103 cooperates to support the deep well strong seismograph 101 on the inner wall of the wellbore 4 and ensures that the deep well strong seismograph 101 is in a vertical position in the wellbore 4, thereby realizing automatic control of straightening.

[0058] Furthermore, the tilt measuring device 104 may be, but is not limited to, a tilt meter.

[0059] Furthermore, such as Figure 1 , Figure 3 As shown, each seismic measuring device 1 is connected via a signal transmission cable 2, which is electrically connected to the controller 3, thereby enabling the transmission of data and signals such as tilt measurement data, control signals, and ground motion acceleration. Of course, to ensure the stability of the series connection between the seismic measuring devices 1, other connection structures are installed between adjacent seismic measuring devices 1 to ensure a stable connection between adjacent devices.

[0060] In an optional embodiment of the present invention, such as Figures 1 to 3As shown, the tandem downhole seismograph also includes a base 107 disposed at the bottom of the deep well strong seismograph 101. The base 107 has an annular receiving groove 1071 on its side wall and along its circumference. Multiple stabilizing supports 108 are movably disposed within the receiving groove 1071 along the radial direction of the wellbore 4. Each stabilizing support 108 is a bent rod-shaped structure with a protruding support end in its middle. When the stabilizing support 108 moves to the first position, its support end is located outside the receiving groove 1071 and abuts against the inner wall of the wellbore 4, thus fixing the position of the deep well strong seismograph 101 within the wellbore 4 through the cooperation of multiple stabilizing supports 108. When the stabilizing support 108 moves to the second position, its support end is located inside the receiving groove 1071 and separates from the inner wall of the wellbore 4. The receiving groove 1071 can be an annular groove arranged along the circumference of the base 107, or it can be a plurality of blind hole grooves arranged along the circumference of the base 107, and at least one stable support member 108 is provided in each receiving groove 1071.

[0061] Furthermore, a guide rail extending radially along the wellbore 4 is provided on the bottom inner wall of the receiving groove 1071. The stabilizing support 108 is slidably mounted on the guide rail. By controlling the sliding position of the stabilizing support 108 on the guide rail, the stabilizing support 108 can move radially along the wellbore 4 within the receiving groove 1071. The guide rail can be an existing transmission control guide rail (such as a transmission chain or transmission belt). A sliding block is provided on the guide rail, and the transmission of the guide rail (which can be driven by a motor) can drive the sliding block to move on it. The stabilizing support 108 can be connected to the sliding block, thereby enabling the stabilizing support 108 to move on the guide rail.

[0062] In an optional embodiment of the present invention, the deep well strong seismic instrument 101 is a vertically arranged cylindrical shape, and the diameter of the deep well strong seismic instrument 101 is smaller than the diameter of the well barrel 4. The top plate 102 is a disc-shaped plate structure, and the base 107 is a vertically arranged cylindrical shape, the diameters of both the top plate 102 and the base 107 are smaller than the diameter of the well barrel 4.

[0063] Furthermore, the diameter of the deep well strong seismic instrument 101 is greater than or equal to 70 mm and less than or equal to 110 mm; the diameter of the well casing 4 is greater than or equal to 90 mm and less than or equal to 250 mm.

[0064] To ensure that the lowering of the straightening support 103 and the stabilizing support 108 in this invention meets the installation requirements of the wellbore, when the deep well strong seismic instrument 101 is in the installation stage, the diameter of the deep well strong seismic instrument 101, the top plate 102 and the base 107 are smaller than the diameter of the wellbore 4; when the deep well strong seismic instrument 101 reaches the preset depth in the wellbore 4, the straightening support 103 and the stabilizing support 108 are adjusted to move and straighten and fix the deep well strong seismic instrument 101 in the preset position in the wellbore 4.

[0065] The working process of the series seismic measuring device of the present invention is as follows:

[0066] During the lowering of the tandem seismic monitoring device into the wellbore 4, each uprighting support 103 moves into the installation gap 106, and each stabilizing support 108 moves into the receiving groove 1071. Neither the uprighting support 103 nor the stabilizing support 108 contacts the inner wall of the wellbore 4, allowing the tandem seismic monitoring device to be smoothly lowered along the wellbore 4. This process requires no electronic control equipment; it relies solely on the weight of the tandem seismic monitoring device itself for lowering, making it simple to operate and highly reliable.

[0067] When the series-connected seismograph device is lowered to a preset position inside the wellbore 4, each seismograph device 1 in the series-connected seismograph device is stabilized and straightened sequentially from top to bottom. First, stabilization control is performed, that is, the controller 3 controls multiple stabilizing support members 108 in the seismograph device 1 to move away from the central axis of the wellbore 4. The support ends of the multiple stabilizing support members 108 abut against the inner wall of the wellbore 4, so that the position of the deep well strong seismograph 101 inside the wellbore 4 is fixed by the cooperation of the multiple stabilizing support members 108, so that the seismograph device 1 remains stable. When the seismograph device 1 is fixed to the inner wall of the wellbore 4, the weight of the deep well strong seismograph 101 and the supporting force provided by the multiple stabilizing support members 108 cancel each other out, but if Figure 3As shown, since the inner wall of the wellbore 4 may have a certain tilt, the deep well strong seismograph 101 in the fixed state may not be in a completely vertical position. Therefore, the deep well strong seismograph 101 may have a certain tilt angle. Then, straightening control is performed. Since the deep well strong seismograph 101 has a certain tilt angle, it is necessary to further adjust the attitude of the deep well strong seismograph 101 to achieve precise straightening downhole. At this time, the controller 3 will receive the tilt angle data detected by the tilt angle measuring device 104. The controller 3 will adjust the multiple drive devices 105 on the deep well strong seismograph 101 according to the tilt angle data of the deep well strong seismograph 101, thereby controlling the movement position of each straightening support 103, so that each straightening support 103 cooperates to support the deep well strong seismograph 101 on the inner wall of the wellbore 4, and ensure that the deep well strong seismograph 101 is in a vertical position inside the wellbore 4, thereby realizing automatic straightening control. For example, when the data detected by the tilt measuring device 104 indicates that the upper part of the deep well strong seismograph 101 is tilted to the right (i.e., the left side is higher than the right side), the corresponding drive device 105 can be controlled to increase the movement distance of each straightening support 103 on the left side of the deep well strong seismograph 101 away from the central axis of the wellbore 4, while decreasing the movement distance of each straightening support 103 on the right side of the deep well strong seismograph 101 away from the central axis of the wellbore 4. By slowly adjusting, the tilt angle reading detected by the tilt measuring device 104 can gradually approach or even reach zero, thereby straightening the deep well strong seismograph 101.

[0068] In this invention, when stabilizing and straightening each seismic measuring device 1, the operation must be performed sequentially from top to bottom. The advantage of this sequence is that when stabilizing and straightening the preceding seismic measuring device 1 (i.e., the one located above), only the attitude of the seismic measuring device 1 below it is affected, without affecting the seismic measuring device 1 above it that is already in a vertical position. By performing the fixing and straightening operations sequentially from top to bottom, it can be ensured that all the seismic measuring devices 1 connected in series are in a stable and straightened state.

[0069] The features and advantages of the series seismic measuring device of the present invention are as follows:

[0070] This series-connected seismograph device utilizes multiple drive devices 105 to control the movement of corresponding straightening support members 103. The coordinated operation of these support members 103 adjusts the tilt of the deep well seismograph 101. During adjustment, the tilt angle measuring device 104 continuously detects and reduces the tilt angle of the deep well seismograph 101, ultimately achieving precise straightening of the deep well seismograph 101. Since the multiple straightening support members 103 are located on top of the deep well seismograph 101, they can accurately straighten the seismograph 101 based on its tilt without affecting its normal operation. This ensures that the multiple deep well seismographs 101 connected in series can be stably and vertically installed within the wellbore 4.

[0071] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A series-connected downhole seismic monitoring device, characterized in that, The series-connected downhole seismic monitoring device includes multiple seismic monitoring devices arranged in series. Each of the seismic measuring devices includes: Deep well high-intensity seismograph; Multiple centering supports are located on the deep well strong seismograph, and the multiple centering supports are arranged at intervals along the circumference of the deep well strong seismograph. The multiple centering supports have at least an open state and a retracted state. When the centering support is in the open state, at least a portion of the centering support moves radially away from the central axis of the well shaft until it abuts against the inner wall of the well shaft, so as to support the deep well strong seismograph in a preset posture within the well shaft. When the centering support is in the retracted state, the centering support moves radially towards the central axis of the well shaft until it separates from the inner wall of the well shaft. Multiple stabilizing supports are located on the deep well strong seismometer, and the multiple stabilizing supports are arranged at intervals along the circumference of the deep well strong seismometer. The multiple stabilizing supports can move from a first position to a second position at least radially along the well shaft. When the stabilizing support moves away from the central axis of the well shaft to the first position, at least a portion of the stabilizing support abuts against the inner wall of the well shaft. When the stabilizing support moves towards the central axis of the well shaft to the second position, the stabilizing support separates from the inner wall of the well shaft.

2. The series-connected downhole seismic monitoring device as described in claim 1, characterized in that, The series-connected downhole seismic monitoring device also includes multiple driving devices, each of which corresponds to one of the centralizing support members. The driving end of each driving device is connected to the corresponding centralizing support member, and the driving device is used to drive the corresponding centralizing support member to switch between the open state and the retracted state.

3. The series-connected downhole seismic monitoring device as described in claim 2, characterized in that, The series-type downhole seismograph also includes a top plate located above the deep well strong seismometer, with an installation gap between the top plate and the top of the deep well strong seismometer. Multiple centering supports are located within the installation gap, and multiple driving devices are disposed on the top of the top plate. When the centering support is in the extended state, at least a portion of the centering support moves to the outside of the installation gap and abuts against the inner wall of the wellbore. When the centering support is in the retracted state, the centering support moves back into the installation gap and separates from the inner wall of the wellbore.

4. The series-connected downhole seismic monitoring device as described in claim 3, characterized in that, The driving device is a drive motor; The straightening support is a bent rod-shaped structure with a protruding support end in the middle. The bottom end of the straightening support is rotatably connected to the top of the deep well strong seismic instrument. The output shaft of the drive motor passes through the top plate and is connected to the top end of the straightening support. When the straightening support is in the extended state, the output shaft of the drive motor drives the straightening support to rotate until the support end of the straightening support is outside the installation gap and abuts against the inner wall of the wellbore. When the straightening support is in the retracted state, the output shaft of the drive motor drives the straightening support to rotate until the support end of the straightening support is inside the installation gap and separates from the inner wall of the wellbore.

5. The series-connected downhole seismic monitoring device as described in claim 3, characterized in that, The driving device is a hydraulic cylinder; The straightening support includes a first connecting rod and a second connecting rod. The bottom end of the second connecting rod is hinged to the top of the deep well strong seismic instrument, and the top end of the second connecting rod is hinged to the bottom end of the first connecting rod. The piston rod of the hydraulic cylinder passes through the top plate and is hinged to the top end of the first connecting rod. When the straightening support is in the extended state, the piston rod of the hydraulic cylinder extends downward, causing the top end of the first connecting rod to move downward to the hinge position between the first and second connecting rods, moving to the outside of the installation gap and abutting against the inner wall of the wellbore. When the straightening support is in the retracted state, the piston rod of the hydraulic cylinder retracts upward, causing the top end of the first connecting rod to move upward to the hinge position between the first and second connecting rods, moving to the inside of the installation gap and separating from the inner wall of the wellbore.

6. The series-connected downhole seismic monitoring device as described in any one of claims 2 to 5, characterized in that, The series-connected downhole seismic monitoring device also includes a tilt angle measuring device, which is installed on the deep well strong seismometer and is used to detect the tilt angle of the deep well strong seismometer.

7. The series-connected downhole seismic monitoring device as described in claim 6, characterized in that, The series-connected downhole seismic monitoring device also includes a controller. The detection signal receiving end of the controller is electrically connected to the detection signal output end of the tilt measuring device, and the control signal output end of the controller is electrically connected to the control end of each of the drive devices.

8. The series-connected downhole seismic monitoring device as described in claim 7, characterized in that, Each of the seismic measuring devices is connected via a signal transmission cable, and the signal transmission cable is electrically connected to the controller.

9. The series-connected downhole seismic monitoring device as described in claim 1, characterized in that, The series-type downhole seismic measuring device also includes a base disposed at the bottom of the deep well strong seismometer, and the base has a receiving groove on its side wall and along the circumference of the base, and a plurality of the stabilizing support members are disposed in the receiving groove in a radially movable manner along the wellbore. The stabilizing support is a bent rod-shaped structure with a protruding support end in the middle. When the stabilizing support moves to the first position, the support end of the stabilizing support is located outside the receiving groove and abuts against the inner wall of the well shaft. When the stabilizing support moves to the second position, the support end of the stabilizing support is located inside the receiving groove and separates from the inner wall of the well shaft.

10. The series-connected downhole seismic monitoring device as described in claim 9, characterized in that, The accommodating groove is provided with a guide rail extending radially along the well shaft on its top inner wall and / or bottom inner wall, and the stabilizing support is slidably mounted on the guide rail.

11. The series-connected downhole seismic monitoring device as described in claim 1, characterized in that, The deep well strong seismic instrument is a vertically arranged cylindrical shape, and the diameter of the deep well strong seismic instrument is smaller than the diameter of the well casing.

12. The series-connected downhole seismic monitoring device as described in claim 11, characterized in that, The diameter of the deep well high-intensity seismograph is greater than or equal to 70 mm and less than or equal to 110 mm; The diameter of the wellbore is greater than or equal to 90 mm and less than or equal to 250 mm.

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