Wireless underground liquid level monitoring device

Abstract

The invention discloses a wireless underground liquid level monitoring device, and relates to the technical field of underground liquid level monitoring. The device comprises a middle sleeve, telescopic grooves are formed in the two ends of the middle sleeve, a second telescopic sleeve is slidably connected to the interior of the left telescopic groove, a first telescopic sleeve is slidably connected to the interior of the right telescopic groove, the middle sleeve, the second telescopic sleeve and the first telescopic sleeve form a capsule shape, and a telescopic assembly is arranged in the middle sleeve; the telescopic assembly can drive the second telescopic sleeve and the first telescopic sleeve to synchronously and reversely slide. The wireless positioning technology and the floating ball monitoring method are combined, the specific position of each monitoring device can be displayed in real time through the wireless positioning technology, errors caused by sound wave propagation speed, bubbles, foams, liquid fluctuation and the like are avoided, meanwhile, the liquid level fluctuation condition can be accurately transmitted, the liquid level position can be accurately judged according to the liquid level fluctuation condition, and the monitoring accuracy is improved. And vibration generated by liquid level fluctuation is utilized to generate power, so that the service life of the device can be prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of downhole liquid level monitoring, and in particular to a wireless downhole liquid level monitoring device. Background Art

[0002] With the continuous development of industrialization and automation technology, the demand for monitoring and data collection of production equipment in various industries is constantly increasing. In the application scenarios of underground liquid storage and transportation, liquid level monitoring is one of the most important links. Especially in underground environments such as mines, oil wells, and water wells, accurate and efficient monitoring of liquid level changes is of great significance for ensuring production safety, improving work efficiency, saving costs, and preventing accidents.

[0003] The conventional method for testing the dynamic liquid level of oil wells is the acoustic indirect measurement method. The conventional method uses an oil well dynamic liquid level testing device that uses a nitrogen bottle or an air compressor as a sound source at the wellhead, and the sound source is connected to the casing. High-pressure gas is released into the casing. When the high-pressure gas is released into the low-pressure gas, it will expand instantly and emit sound waves. The sound waves propagate downward and are reflected when they encounter the oil pipe collar and the dynamic liquid surface downhole. The initial sound waves received by the wellhead sound wave receiving device and the sound waves reflected back from the dynamic liquid surface downhole are used to calculate the depth of the dynamic liquid surface downhole. In a Chinese patent (application number: CN202410515289.4), an adaptive downhole dynamic liquid level real-time monitoring device is disclosed. Although improvements have been made on the original technology, it is essentially an acoustic indirect measurement method. In actual use, the components in the oil well are complex, and there is also gas. The oil and gas mixture near the liquid surface is relatively complex and prone to bubbles. The propagation of sound waves will be disturbed, resulting in measurement errors. At the same time, the oil in the well is always in the suction process. When the liquid level fluctuates greatly, it is difficult to accurately measure the liquid level. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and provide a wireless downhole liquid level monitoring device.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A wireless downhole liquid level monitoring device comprises an intermediate sleeve, both ends of the intermediate sleeve are provided with telescopic grooves, a telescopic sleeve 2 is slidably connected inside the left telescopic groove, a telescopic sleeve 1 is slidably connected inside the right telescopic groove, the intermediate sleeve, the telescopic sleeve 2 and the telescopic sleeve 1 form a capsule shape, a telescopic assembly is arranged inside the intermediate sleeve, and the telescopic assembly can drive the telescopic sleeve 2 and the telescopic sleeve 1 to slide synchronously in the opposite direction; A battery cavity is provided inside the telescopic sleeve 1, a charging power source is fixedly installed inside the battery cavity, a vibration generator is fixedly installed inside the middle sleeve, the vibration generator is tilted, and the vibration generator is electrically connected to the charging power source through a wire, a coil is provided inside the vibration generator, a permanent magnet is plugged inside the coil, outer rings are provided at both ends of the permanent magnet, and a reset spring is provided between the outer ring and the vibration generator, a device cavity is provided inside the telescopic sleeve 2, a controller, a wireless positioning module and a signal amplifier are fixedly installed inside the device cavity, the controller can control the operation of the telescopic assembly, and the overall weight of the telescopic sleeve 2 is the same as that of the telescopic sleeve 1; The telescopic sleeve 2 and the telescopic sleeve 1 are both fixedly installed with a top spring on the side close to the vibration generator, the top spring is fixedly connected with a top ring on the side close to the vibration generator, and the top ring is fixedly installed with a top block on the side close to the vibration generator. The top block on the telescopic sleeve 2 can touch the bottom end of the permanent magnet, and the top block on the telescopic sleeve 1 can touch the top end of the permanent magnet.

[0006] Further, the telescopic assembly includes an inner support frame and a liquid carbon dioxide storage device, the inner support frame and the liquid carbon dioxide storage device are fixedly installed inside the intermediate sleeve, and the inner support frame is located between the vibration generator and the liquid carbon dioxide storage device, and both sides of the intermediate sleeve are fixedly installed with a pneumatic telescopic cylinder, and the liquid carbon dioxide storage device is connected to the pneumatic telescopic cylinder through a pulse solenoid valve, and an inner exhaust valve is arranged on the outer side of the inner support frame, and the inner exhaust valve is connected to the pneumatic telescopic cylinder, and an outer exhaust valve is arranged on the top of the intermediate sleeve, and the inner exhaust valve, the outer exhaust valve and the pulse solenoid valve are all electrically connected to the controller; The telescopic sleeve 2 and the telescopic sleeve 1 are both fixedly mounted with telescopic piston rods on the side close to the vibration generator. The telescopic piston rods are sealed and inserted in the pneumatic telescopic cylinder. A tension spring is arranged between the telescopic piston rod and the inner wall of the pneumatic telescopic cylinder.

[0007] Furthermore, a constant pressure valve is arranged on the outside of the liquid carbon dioxide storage device, a pressure sensor is fixedly mounted on the inner wall of the intermediate sleeve, and the pressure sensor is electrically connected to the controller.

[0008] Furthermore, a liquid cavity is arranged inside the telescopic sleeve 1, a one-way solenoid valve is arranged at the bottom of the liquid cavity, and the one-way solenoid valve is electrically connected to the controller.

[0009] Furthermore, a bottom block is provided at the bottom of the inner support frame.

[0010] Furthermore, the middle sleeve, the second telescopic sleeve and the first telescopic sleeve are all made of polytetrafluoroethylene, and the inner walls are all hollow in design, and reinforcing ribs are arranged inside the inner walls.

[0011] Furthermore, the wireless positioning module is an ultra-wideband positioning module.

[0012] Furthermore, a mounting portion is provided on the inner wall of the intermediate sleeve, and mounting hoops are provided on the outer sides of the vibration generator and the liquid carbon dioxide storage device, and the mounting hoops can be fixedly mounted on the mounting portion by bolts.

[0013] Furthermore, a wire passing hole is provided inside the top ring of the telescopic sleeve, and the wire passes through the wire passing hole.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention combines wireless positioning technology with a float monitoring method. The wireless positioning technology can display the specific position of each monitoring device in real time, which is convenient for understanding the overall liquid level of nearby oil wells. The liquid level is determined based on the physical position of the float, avoiding errors caused by sound wave propagation speed, bubbles, foam, liquid fluctuations, etc. At the same time, wireless float positioning can monitor and record liquid level data in real time, and can accurately transmit liquid level fluctuations. According to the liquid level fluctuations, the liquid level position can be accurately determined, and the monitoring accuracy is high.

[0015] 2. The liquid level monitoring device of the present invention adopts a capsule type, and its volume can be automatically adjusted, so that the device can stably float on the liquid surface of different densities. At the same time, during monitoring, the volume increases, which can prevent it from being sucked out of the oil pipe along with the oil, and the monitoring stability is high.

[0016] 3. The present invention can greatly extend the service life of the device by setting a small power generation component inside the liquid level monitoring device and utilizing the vibration generated by the liquid level fluctuation to generate electricity. The device volume increases to the maximum during power generation and is more likely to move with the liquid level. During normal monitoring, the power generation component is restricted to prevent overheating caused by continuous power generation, and the device has high operating stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is an exploded view of the present invention; Figure 4 It is a cross-sectional schematic diagram of the intermediate sleeve of the present invention; Figure 5 It is a schematic diagram of the inner support structure of the present invention; Figure 6 It is a cross-sectional structural schematic diagram of a telescopic sleeve of the present invention; Figure 7 It is a schematic diagram of the internal structure of the vibration generator of the present invention.

[0018] Figure numerals: 1. middle sleeve; 11. telescopic groove; 12. mounting portion; 13. external exhaust valve; 14. pressure sensor; 2. internal support frame; 21. pneumatic telescopic cylinder; 22. pulse solenoid valve; 23. internal exhaust valve; 24. bottom block; 3. telescopic sleeve one; 31. charging power supply; 32. liquid chamber; 33. one-way solenoid valve; 34. telescopic piston rod; 35. tension spring; 4. telescopic sleeve two; 41. controller; 42. wireless positioning module; 43. signal amplifier; 5. top spring; 6. top ring; 7. top block; 8. vibration generator; 81. wire; 82. coil; 83. permanent magnet; 84. outer ring; 85. reset spring; 9. liquid carbon dioxide storage device; 91. constant pressure valve. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] Embodiment 1, as Figure 1-Figure 7 As shown, a wireless downhole liquid level monitoring device comprises an intermediate sleeve 1, both ends of the intermediate sleeve 1 are provided with telescopic grooves 11, a telescopic sleeve 2 4 is slidably connected inside the left telescopic groove 11, a telescopic sleeve 1 3 is slidably connected inside the right telescopic groove 11, the intermediate sleeve 1, the telescopic sleeve 2 4 and the telescopic sleeve 1 3 form a capsule shape, a telescopic assembly is arranged inside the intermediate sleeve 1, and the telescopic assembly can drive the telescopic sleeve 2 4 and the telescopic sleeve 1 3 to slide synchronously in the opposite direction; A battery cavity is provided inside the telescopic sleeve 1 3, a charging power source 31 is fixedly installed inside the battery cavity, a vibration generator 8 is fixedly installed inside the middle sleeve 1, the vibration generator 8 is tilted, and the vibration generator 8 is electrically connected to the charging power source 31 through a wire 81, a coil 82 is provided inside the vibration generator 8, a permanent magnet 83 is plugged inside the coil 82, outer rings 84 are provided at both ends of the permanent magnet 83, and a reset spring 85 is provided between the outer ring 84 and the vibration generator 8, a device cavity is provided inside the telescopic sleeve 2 4, a controller 41, a wireless positioning module 42 and a signal amplifier 43 are fixedly installed inside the device cavity, the controller 41 can control the operation of the telescopic assembly, and the telescopic sleeve 2 4 has the same overall weight as the telescopic sleeve 1 3; A top spring 5 is fixedly installed on the side of the telescopic sleeve 2 4 and the telescopic sleeve 1 3 close to the vibration generator 8. A top ring 6 is fixedly connected to the side of the top spring 5 close to the vibration generator 8. A top block 7 is fixedly installed on the side of the top ring 6 close to the vibration generator 8. The top block 7 on the telescopic sleeve 2 4 can contact the bottom end of the permanent magnet 83, and the top block 7 on the telescopic sleeve 1 3 can contact the top end of the permanent magnet 83.

[0021] Furthermore, the wireless positioning module 42 is an ultra-wideband positioning module.

[0022] When in use, the liquid level monitoring device is put into the well. Since the overall weight of the telescopic sleeve 2 4 and the telescopic sleeve 1 3 is the same, the device floats horizontally on the liquid surface. At this time, the device is in the smallest capsule shape, the overall volume of the device is small, the depth of sinking into the liquid is large, and when the liquid surface fluctuates, the floating amplitude of the device is small. The ultra-wideband positioning system can monitor the position of the wireless positioning module 42 in real time, and monitor the up and down floating of the device at the same time. The floating situation of the specific position of the device is obtained through the positioning module, and the spatial distribution of the liquid level change is further analyzed. Generally, multiple oil wells are distributed at the same oil layer position. By setting up multiple wellheads, sometimes a higher oil recovery rate and a lower unit cost can be achieved, and the overall economic benefits are more considerable. A group of monitoring devices are put into each wellhead, and multiple monitoring devices share an ultra-wideband positioning system. By combining the liquid surface position data of multiple oil wells, the oil layer distribution can be accurately analyzed, which can improve the oil recovery efficiency. The liquid level is determined based on the physical position of the float, avoiding errors caused by the propagation speed of sound waves, bubbles, foam, liquid fluctuations, etc.; In order to extend the use time of the monitoring device, a micro power generation component is arranged inside. When the oil in the oil well is sucked, the liquid level fluctuates for a long time, so there is enough fluctuation energy to generate electricity. Therefore, after the device is used for a period of time, the power generation component is automatically triggered. At this time, the controller 41 controls the operation of the telescopic component, and the telescopic component drives the telescopic sleeve 2 4 and the telescopic sleeve 1 3 to extend outward at the same time. The telescopic sleeve 2 4 and the telescopic sleeve 1 3 drive the top block 7 principle permanent magnet 83, and the overall volume of the monitoring device increases, and the buoyancy increases. When the liquid level fluctuates, the monitoring device is more likely to fluctuate with the water surface. The floating amplitude of the monitoring device increases with the liquid level. As the device shakes, the permanent magnet 83 moves back and forth inside the coil 82 under the action of inertia and the elastic force of the reset spring 85. According to Faraday's law of electromagnetic induction, the change in the magnetic field will induce current in the conductor coil to charge the charging power supply 31. After charging is completed, the telescopic component drives the telescopic sleeve 2 4 and the telescopic sleeve 1 3 to retract, and the top block 7 again supports the permanent magnet 83. The volume of the monitoring device is reduced again, the buoyancy is reduced, and the monitoring is more stable. At the same time, the device stops generating electricity to prevent overheating caused by continuous power generation. The device structure is simple and compact. As the oil is pumped out, the density of the oil will change. At this time, the volume of the device can be fine-tuned through the telescopic components to keep the monitoring device stable and adaptable.

[0023] Embodiment 2, on the basis of the above embodiment, further includes, the telescopic assembly includes an inner support frame 2 and a liquid carbon dioxide storage 9, the inner support frame 2 and the liquid carbon dioxide storage 9 are fixedly installed inside the intermediate sleeve 1, and the inner support frame 2 is located between the vibration generator 8 and the liquid carbon dioxide storage 9, and both sides of the intermediate sleeve 1 are fixedly installed with a pneumatic telescopic cylinder 21, the liquid carbon dioxide storage 9 is connected to the pneumatic telescopic cylinder 21 through a pulse solenoid valve 22, an inner exhaust valve 23 is provided on the outer side of the inner support frame 2, and the inner exhaust valve 23 is connected to the pneumatic telescopic cylinder 21, and an outer exhaust valve 13 is provided on the top of the intermediate sleeve 1, and the inner exhaust valve 23, the outer exhaust valve 13 and the pulse solenoid valve 22 are all electrically connected to the controller 41; A telescopic piston rod 34 is fixedly installed on the side of the telescopic sleeve 2 4 and the telescopic sleeve 1 3 close to the vibration generator 8. The telescopic piston rod 34 is sealed and inserted in the pneumatic telescopic cylinder 21. A tension spring 35 is arranged between the telescopic piston rod 34 and the inner wall of the pneumatic telescopic cylinder 21.

[0024] When power generation is needed, the pulse solenoid valve 22 is opened, and liquid carbon dioxide is sprayed into the air pressure telescopic cylinder 21 and vaporized quickly, so that the air pressure inside the air pressure telescopic cylinder 21 increases, and the air pressure pushes the telescopic piston rod 34 to extend, and the telescopic piston rods 34 on both sides simultaneously drive the telescopic sleeve 2 4 and the telescopic sleeve 1 3 to extend. Through the setting of the pulse solenoid valve 22, carbon dioxide is ejected in pulses, extending a short distance at a time, and the posture of the device is more stable and the telescopic is stable. When the telescopic sleeve 2 4 and the telescopic sleeve 1 3 need to be retracted, the inner exhaust valve 23 and the outer exhaust valve 13 are controlled to open at the same time to discharge the carbon dioxide inside the air pressure telescopic cylinder 21, and the tension spring 35 drives the telescopic sleeve 2 4 and the telescopic sleeve 1 3 to retract through the telescopic piston rod 34. The control is simple, and a can of liquid carbon dioxide can provide at least 50% of power generation telescopic of the device. While the structure is simple, it can greatly extend the service life of the device. At the same time, due to the high temperature underground, high temperature is easily generated inside the device. When liquid carbon dioxide vaporizes, it can absorb external heat, which can quickly reduce the temperature inside the device and further increase the service life of the equipment.

[0025] Embodiment 3, based on the above embodiment, further includes that a constant pressure valve 91 is provided on the outside of the liquid carbon dioxide storage 9, a pressure sensor 14 is fixedly installed on the inner wall of the intermediate sleeve 1, and the pressure sensor 14 is electrically connected to the controller 41.

[0026] When the downhole depth is deeper, the pressure will also increase greatly. If the pressure difference between the inside and outside of the device is too large, it will easily cause the device to deform, especially when the volume of the device increases, the internal pressure will further decrease. Therefore, through the setting of the constant pressure valve 91, when the telescopic sleeve 2 4 and the telescopic sleeve 1 3 are extended, the constant pressure valve 91 is opened at the same time to fill the inside of the device with carbon dioxide gas to increase the internal pressure of the device. When the telescopic sleeve 2 4 and the telescopic sleeve 1 3 are retracted, the external exhaust valve 13 is opened to prevent the internal pressure of the device from being too high and ensure that the pressure difference between the inside and outside of the device does not exceed the tolerance range of the device. In addition, the pressure difference between the inside and outside of the device can be adjusted in real time according to the liquid level position monitored by the ultra-wideband positioning system.

[0027] Embodiment 4, based on the above embodiment, further includes: a liquid chamber 32 is provided inside the telescopic sleeve 3 , a one-way solenoid valve 33 is provided at the bottom of the liquid chamber 32 , and the one-way solenoid valve 33 is electrically connected to the controller 41 .

[0028] Furthermore, a bottom block 24 is provided at the bottom of the inner support frame 2 .

[0029] By setting the bottom block 24, the center of gravity of the device is biased downward to ensure that the one-way solenoid valve 33 is located below the liquid surface. When recovery is required, the one-way solenoid valve 33 is opened, and the oil enters the liquid chamber 32, which causes the weight of the telescopic sleeve 1 3 to be much greater than the weight of the telescopic sleeve 2 4, so that the device floats vertically in the liquid, and the telescopic sleeve 1 3 faces downward, so that the device can be sucked out with the liquid.

[0030] Embodiment 5, based on the above embodiment, also includes that the middle sleeve 1, telescopic sleeve 2 4 and telescopic sleeve 1 3 are all made of polytetrafluoroethylene, and the inner walls are all hollow in design, and reinforcing ribs are arranged inside the inner walls, which can reduce the weight while improving the overall strength of the device, and polytetrafluoroethylene has high corrosion resistance.

[0031] Embodiment 6, based on the above embodiment, further includes that the inner wall of the intermediate sleeve 1 is provided with a mounting portion 12, and the outer sides of the vibration generator 8 and the liquid carbon dioxide storage device 9 are provided with mounting hoops, and the mounting hoops can be fixed on the mounting portion 12 by bolts, which is convenient for installation.

[0032] Furthermore, a wire passing hole is provided inside the top ring 6 of the telescopic sleeve 1 3 , and the wire 81 passes through the wire passing hole.

[0033] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wireless downhole liquid level monitoring device, comprising an intermediate sleeve (1), characterized in that: Both ends of the middle sleeve (1) are provided with telescopic grooves (11); the interior of the left telescopic groove (11) is slidably connected to the second telescopic sleeve (4); the interior of the right telescopic groove (11) is slidably connected to the first telescopic sleeve (3); the middle sleeve (1), the second telescopic sleeve (4) and the first telescopic sleeve (3) form a capsule shape; a telescopic assembly is arranged inside the middle sleeve (1); the telescopic assembly can drive the second telescopic sleeve (4) and the first telescopic sleeve (3) to slide synchronously in opposite directions; The first telescopic sleeve (3) has a battery cavity formed inside, a charging power source (31) is fixedly installed inside the battery cavity, a vibration generator (8) is fixedly installed inside the middle sleeve (1), the vibration generator (8) is tilted, the vibration generator (8) is electrically connected to the charging power source (31) via a wire (81), a coil (82) is provided inside the vibration generator (8), a permanent magnet (83) is inserted inside the coil (82), outer rings (84) are provided at both ends of the permanent magnet (83), a return spring (85) is provided between the outer ring (84) and the vibration generator (8), a device cavity is formed inside the second telescopic sleeve (4), a controller (41), a wireless positioning module (42) and a signal amplifier (43) are fixedly installed inside the device cavity, the controller (41) can control the operation of the telescopic assembly, and the second telescopic sleeve (4) and the first telescopic sleeve (3) have the same overall weight; A top spring (5) is fixedly mounted on the side of the telescopic sleeve 2 (4) and the telescopic sleeve 1 (3) close to the vibration generator (8); a top ring (6) is fixedly connected to the side of the top spring (5) close to the vibration generator (8); a top block (7) is fixedly mounted on the side of the top ring (6) close to the vibration generator (8); the top block (7) on the telescopic sleeve 2 (4) can contact the bottom end of the permanent magnet (83); and the top block (7) on the telescopic sleeve 1 (3) can contact the top end of the permanent magnet (83).

2. A wireless downhole liquid level monitoring device according to claim 1, characterized in that: The telescopic assembly comprises an inner support frame (2) and a liquid carbon dioxide storage device (9), wherein the inner support frame (2) and the liquid carbon dioxide storage device (9) are both fixedly mounted inside the intermediate sleeve (1), and the inner support frame (2) is located between the vibration generator (8) and the liquid carbon dioxide storage device (9), and pneumatic telescopic cylinders (21) are fixedly mounted on both sides of the intermediate sleeve (1), and the liquid carbon dioxide storage device (9) is connected to the pneumatic telescopic cylinder (21) via a pulse electromagnetic valve (22), and an inner exhaust valve (23) is arranged on the outer side of the inner support frame (2), and the inner exhaust valve (23) is connected to the pneumatic telescopic cylinder (21), and an outer exhaust valve (13) is arranged on the top of the intermediate sleeve (1), and the inner exhaust valve (23), the outer exhaust valve (13) and the pulse electromagnetic valve (22) are all electrically connected to a controller (41); A telescopic piston rod (34) is fixedly mounted on the telescopic sleeve 2 (4) and the telescopic sleeve 1 (3) on one side close to the vibration generator (8); the telescopic piston rod (34) is sealed and inserted into the pneumatic telescopic cylinder (21); and a tension spring (35) is provided between the telescopic piston rod (34) and the inner wall of the pneumatic telescopic cylinder (21).

3. A wireless downhole liquid level monitoring device according to claim 2, characterized in that: A constant pressure valve (91) is arranged on the outside of the liquid carbon dioxide storage device (9), and a pressure sensor (14) is fixedly mounted on the inner wall of the intermediate sleeve (1), and the pressure sensor (14) is electrically connected to the controller (41).

4. A wireless downhole liquid level monitoring device according to claim 3, characterized in that: A liquid chamber (32) is provided inside the telescopic sleeve (3), a one-way solenoid valve (33) is provided at the bottom of the liquid chamber (32), and the one-way solenoid valve (33) is electrically connected to the controller (41).

5. A wireless downhole liquid level monitoring device according to claim 4, characterized in that: A bottom block (24) is provided at the bottom of the inner support frame (2).

6. A wireless downhole liquid level monitoring device according to claim 1, characterized in that: The middle sleeve (1), the second telescopic sleeve (4) and the first telescopic sleeve (3) are all made of polytetrafluoroethylene, and the inner walls are all hollow in design, and reinforcing ribs are arranged inside the inner walls.

7. A wireless downhole liquid level monitoring device according to claim 1, characterized in that: The wireless positioning module (42) is an ultra-wideband positioning module.

8. The wireless downhole liquid level monitoring device according to claim 1, characterized in that: The inner wall of the intermediate sleeve (1) is provided with a mounting portion (12), and the outer sides of the vibration generator (8) and the liquid carbon dioxide storage device (9) are both provided with mounting hoops, which can be fixedly mounted on the mounting portion (12) by means of bolts.

9. A wireless downhole liquid level monitoring device according to claim 1, characterized in that: A wire passing hole is provided inside the top ring (6) of the telescopic sleeve (3), and the wire (81) passes through the wire passing hole.

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