Dynamic liquid level monitoring device for oil and gas well

Abstract

The invention provides an oil and gas well dynamic liquid level monitoring device which comprises a main shell and telescopic arm modules, two cavities are formed in the main shell, the telescopic arm modules are arranged in the cavities, each telescopic arm module has an extending state and a retracting state, each telescopic arm module comprises a telescopic mechanism, and each telescopic mechanism comprises a guide shaft, a rotor disc, a driving arm and a driven arm. The main shell is internally provided with two groups of independent cavities, telescopic arm modules which move alternately are movably assembled in the two groups of cavities, the guide shaft is rotatably assembled in the cavities, the rotor disc is slidably assembled on the guide shaft, and the rotor disc is provided with a plurality of driving arms and driven arms which are rotatably connected with the driving arms. Motion data can be recorded and fed back to a controller at the ground end in real time in the process of ascending and descending along with the oil and gas well liquid level, the device always moves in the middle of an oil and gas well shaft, and the situation that the device is scratched and collided with the inner wall of the oil and gas well, floating of the device is blocked, and the measurement precision is affected is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of petrochemical exploitation, and in particular to a device for dynamically monitoring the liquid level of oil and gas wells. Background Art

[0002] Oil and gas wells are key facilities connecting the surface and underground oil and gas reservoirs, mainly used for the exploration, exploitation, and transportation of oil and natural gas.

[0003] Existing oil and gas well liquid level monitoring technologies include traditional acoustic pulse method, gas explosion method, and fiber optic sensing method, etc. Fiber optic sensors have the advantages of high precision, long distance, and anti-interference, and are suitable for complex well mines and high temperature and high pressure environments. Among them, the float-type mechanical coupling fiber optic converts mechanical displacement into optical signals by driving a fiber optic encoder to move in the wellbore through a float, and generates pulsed light through the grating on the optical code disc to obtain the liquid level value. It also has the stability of the mechanical structure and the anti-interference of the fiber optic. However, the float is very easy to collide with the wall of the oil and gas well during the floating process. When the liquid level rises and falls violently, the float is very easy to be blocked by the collision during floating, resulting in device damage or inaccurate measured data. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the embodiments of the present invention is to provide a device for dynamically monitoring the liquid level of oil and gas wells to solve the problems in the above background art.

[0005] To achieve the above technical solution, the present invention provides the following technical solution:

[0006] A device for dynamically monitoring the liquid level of oil and gas wells, the device for dynamically monitoring the liquid level of oil and gas wells has opposite first direction, second direction, and third direction. The device for dynamically monitoring the liquid level of oil and gas wells includes a housing member, the housing member includes a main housing and a lateral groove. The main housing internally is provided with independent first cavity, second cavity, and third cavity. The first cavity and the second cavity are arranged in the inner cavity of the main housing along the third direction, and telescopic arm modules are independently arranged inside the first cavity and the second cavity. A plurality of lateral grooves are circumferentially arranged on the cavity walls of the first cavity and the second cavity;

[0007] The telescopic arm module has opposite extended state and retracted state. The telescopic arm module includes a telescopic mechanism. The telescopic mechanism includes a guiding shaft, a rotor disk, a driving arm, and a driven arm. The guiding shaft is rotationally assembled in the first cavity and the second cavity in a fixed axis manner. The rotor disk is limited and slidably assembled on the guiding shaft along the third direction. A plurality of driving arms are circumferentially arranged on the rotor disk. The end of the driving arm is provided with a driven arm. One end of the driven arm is rotatably connected to the driving arm, and the other end of the driven arm is slidably inserted into the lateral groove;

[0008] The telescopic arm module switches between the extended state and the retracted state, and the two sets of telescopic arm modules are in the extended state and the retracted state respectively.

[0009] As a further solution of the present invention, the housing member further includes a floating box, a bracket, a winding drum, an optical code disk and a bundling port. The floating box is fixedly arranged at the bottom of the main housing. The bracket is arranged on the top of the main housing. The winding drum is rotatably assembled on the bracket. The optical code disk is fixedly arranged on one side of the bracket and is in transmission connection with the winding drum. The bundling port is arranged on the top of the main housing. The optical fiber passes through the bundling port and is wound around the winding drum. One end of the optical fiber is electrically connected to the optical code disk, and the other end of the optical fiber is electrically connected to the terminal controller.

[0010] As a further solution of the present invention, the housing member further includes a limiting rod. The limiting rod is fixedly arranged at one end of the lateral groove. The telescopic mechanism further includes a limiting groove, a sleeve rod and anti-slip teeth. The limiting groove is arranged on the driven arm and is in limiting sliding fit with the limiting rod. The sleeve rod is elastically inserted at the end of the driven arm, and anti-slip teeth are fixedly assembled at the end of the sleeve rod.

[0011] As a further solution of the present invention, the telescopic mechanism further includes an annular groove track, a positioning rod, a toothed plate member, a first transmission gear, a side shaft, a side shaft and a driving gear. The annular groove track is fixedly arranged at the outer wall end of the rotor disk. The positioning rod is fixedly arranged in the first cavity and the second cavity. One end of the toothed plate member is in limiting sliding arrangement on the positioning rod, and the other end of the toothed plate member is slidably assembled in the annular groove track. The first transmission gear and the second transmission gear are fixedly arranged in the first cavity and the second cavity, and one end of the first transmission gear is meshed with the toothed plate member, and the other end of the first transmission gear is in transmission connection with the second transmission gear. The side shaft is fixedly arranged in the first cavity and the second cavity along the third direction, and the side shaft is respectively in transmission connection with the two second transmission gears. A driving gear is further arranged at the end of the side shaft, and the driving gear is in transmission connection with the winding drum.

[0012] As a further solution of the present invention, the third cavity is arranged between the first cavity and the second cavity, and a transmission assembly is arranged in the third cavity. The transmission assembly includes a reversing shaft, a first reversing gear and an adjusting gear. The reversing shaft is fixedly arranged in the third cavity. The first reversing gear is fixedly arranged on the reversing shaft. The two adjusting gears are fixedly arranged in the third cavity, and the two adjusting gears are respectively coaxially and fixedly connected with the guide shafts in the two telescopic arm modules. The first reversing gear and the adjusting gear are meshed with each other.

[0013] As a further solution of the present invention, the transmission assembly further includes a second reversing gear, a first circumferential plate, a first push rod, a second circumferential plate and a second push rod. The second reversing gear is fixedly assembled on the reversing shaft. The first circumferential plate is arranged in the first cavity and is rotatably arranged around the rotor disc in the circumferential direction. A first push rod is further assembled at the end of the first circumferential plate. The first push rod is slidably inserted into any one set of driving arms in the first cavity. The second circumferential plate is arranged in the second cavity and is rotatably arranged around the rotor disc in the circumferential direction. A second push rod is further assembled at the end of the second circumferential plate. The second push rod is slidably inserted into any one set of driving arms in the second cavity. The second reversing gear is meshed with the first circumferential plate and the second circumferential plate.

[0014] As a further solution of the present invention, the transmission assembly further includes a magnetic shaft bar and side magnetic blocks. The magnetic shaft bar is coaxially and fixedly connected to the reversing shaft. The magnetic shaft bar has opposite first and second ends. Side magnetic blocks are symmetrically arranged on both sides of the magnetic shaft bar, and the first end and the second end of the magnetic shaft bar are respectively magnetically connected to two sets of side magnetic blocks.

[0015] As a further solution of the present invention, the transmission assembly further includes a reversing disc and a middle plate bar. The reversing disc is coaxially and fixedly connected to the reversing shaft. A middle plate bar is fixedly assembled on one side of the reversing disc. The middle plate bar has opposite first triggering surfaces and second triggering surfaces.

[0016] As a further solution of the present invention, two upper pulleys are fixedly arranged on the first triggering surface. An upper synchronous belt is assembled between the two sets of upper pulleys. An upper counterweight block and an upper fixing block are respectively assembled on both sides of the upper synchronous belt. An upper triggering rod is further fixedly assembled on the upper fixing block. Two lower pulleys are fixedly arranged on the second triggering surface. A lower synchronous belt is assembled between the two sets of lower pulleys. A lower counterweight block is independently assembled on the lower synchronous belt. A lower triggering rod is fixedly arranged on the lower counterweight block.

[0017] As a further solution of the present invention, the dynamic liquid level monitoring device for oil and gas wells further includes a measurement transmission mechanism, which includes a reset rod, an upper measurement frame, a lower measurement frame, an upper trigger plate and a lower trigger plate. The reset rod is elastically inserted into one side of the main housing along the third direction. The two ends of the reset rod are respectively fixedly assembled with the upper measurement frame and the lower measurement frame. The upper measurement frame is arranged on one side of the telescopic arm module in the first cavity. The driven arm in the first cavity passes through the upper measurement frame. The lower measurement frame is arranged on one side of the telescopic arm module in the second cavity. The driven arm in the second cavity passes through the lower measurement frame. One end of the upper measurement frame is further provided with an upper trigger plate, which is arranged close to the upper trigger rod. One end of the lower measurement frame is further provided with a lower trigger plate, which is arranged close to the lower trigger rod.

[0018] Adopting the above technical solution, the present invention has the following beneficial effects:

[0019] By arranging two independent cavities inside the main housing and movably assembling telescopic arm modules that operate alternately in the two cavities, the present invention can record motion data during the process of following the rise and fall of the liquid level in the oil and gas well and feedback it to the controller at the ground end in real time. The device always moves in the middle of the oil and gas wellbore, effectively preventing the device from rubbing and colliding with the inner wall of the oil and gas well, resulting in the floating of the device being blocked and affecting the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a partial cross-sectional view of the dynamic liquid level monitoring device for oil and gas wells provided in an embodiment of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the dynamic liquid level monitoring device for oil and gas wells provided in an embodiment of the present invention.

[0023] Figure 3 For Figure 2 the structural schematic diagram of the illustrated mark A.

[0024] Figure 4 It is a front structural schematic diagram of the dynamic liquid level monitoring device for oil and gas wells provided in an embodiment of the present invention.

[0025] Figure 5 ForFigure 4 Schematic structural diagram of the illustrated marker B.

[0026] Figure 6 Schematic side view of the dynamic liquid level monitoring device for oil and gas wells provided in an embodiment of the present invention.

[0027] Figure 7 It is Figure 6 Schematic structural diagram of the illustrated marker C.

[0028] Figure 8 Schematic bottom view of the dynamic liquid level monitoring device for oil and gas wells provided in an embodiment of the present invention.

[0029] Figure 9 It is Figure 8 Schematic structural diagram of the illustrated marker D.

[0030] Reference numerals: 1 - housing member, 101 - main housing, 102 - lateral groove, 103 - floating box, 104 - bracket, 105 - winding drum, 106 - optical code disk, 107 - beam collecting port, 108 - limiting rod, 2 - telescopic mechanism, 201 - guiding shaft, 202 - rotor disk, 203 - driving arm, 204 - driven arm, 205 - limiting groove, 206 - sleeve rod, 207 - anti-slip teeth, 208 - annular groove track, 209 - positioning rod, 210 - toothed plate member, 211 - first transmission gear, 212 - second transmission gear, 213 - side shaft, 214 - driving gear, 3 - transmission assembly, 301 - reversing shaft, 302 - first reversing gear, 303 - position adjusting gear, 304 - second reversing gear, 305 - first circumferential plate, 306 - first push rod, 307 - second circumferential plate, 308 - second push rod, 309 - magnetic shaft bar, 310 - side magnetic block, 311 - reversing disk, 312 - middle plate bar, 313 - upper belt pulley, 314 - upper synchronous belt, 315 - upper counterweight, 316 - upper fixing block, 317 - upper trigger rod, 318 - lower belt pulley, 319 - lower synchronous belt, 320 - lower counterweight, 321 - lower trigger rod, 4 - measurement transmission mechanism, 401 - reset rod, 402 - upper measurement frame, 403 - lower measurement frame, 404 - upper trigger plate, 405 - lower trigger plate. Detailed implementation manners

[0031] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] Please refer to Figures 1 - 9 , an oil and gas well dynamic liquid level monitoring device in an embodiment of the present invention. The oil and gas well dynamic liquid level monitoring device has opposite first direction x, second direction y, and third direction z. The oil and gas well dynamic liquid level monitoring device includes a housing member 1. The housing member 1 includes a main housing 101 and a lateral groove 102. An independent first cavity a1, second cavity a2, and third cavity a3 are provided inside the main housing 101. The first cavity a1 and the second cavity a2 are arranged in the inner cavity of the main housing 101 along the third direction z. And independent telescopic arm modules, namely a first telescopic arm module and a second telescopic arm module, are provided inside the first cavity a1 and the second cavity a2. A plurality of lateral grooves 102 are circumferentially arranged on the cavity walls of the first cavity a1 and the second cavity a2; the telescopic arm module has opposite extended states and retracted states. The telescopic arm module includes a telescopic mechanism 2. The telescopic mechanism 2 includes a guide shaft 201, a rotor disk 202, a driving arm 203, and a driven arm 204. The guide shaft 201 is rotatably assembled in the first cavity a1 and the second cavity a2. The rotor disk 202 is slidably assembled on the guide shaft 201 along the third direction z with a limit. A plurality of driving arms 203 are also circumferentially arranged on the rotor disk 202. A driven arm 204 is provided at the end of the driving arm 203. One end of the driven arm 204 is rotatably connected to the driving arm 203, and the other end of the driven arm 204 is slidably inserted into the lateral groove 102; the telescopic arm module switches between the extended state and the retracted state, and the two groups of telescopic arm modules are respectively in the extended state and the retracted state.

[0034] In actual application of this embodiment, when the oil and gas well dynamic liquid level monitoring device is actually working, the main shell 101 is floated and set at the liquid level position of the oil and gas well, and the main shell 101 is provided with an independent first cavity a1 and a second cavity a2, and the cavity walls of the first cavity a1 and the second cavity a2 are circumferentially provided with a plurality of lateral grooves 102, and the first cavity a1 and the second cavity a2 are respectively independently provided with telescopic arm modules, and the telescopic arm modules include a telescopic mechanism 2, and the guide shaft 201 in the telescopic mechanism 2 is fixedly set in the first cavity a1 and the second cavity a2, and the rotor disk 202 is assembled on the guide shaft 201 in a limited sliding manner along the third direction z. When the rotor disk 202 follows the guide shaft 201 to rotate in the xoy plane, the rotor disk 202 can slide in the third direction z at the same time. The top and bottom of the rotor disk 202 are elastically connected to the cavity walls of the first cavity a1 and the second cavity a2 respectively, so that the rotor disk 202 is located in the middle of the first cavity a1 and the second cavity a2 in a non-stressed state. The rotor disk 202 is also fixedly equipped with a plurality of driving arms 203 in the circumferential direction, and the end of the driving arm 203 is rotatably equipped with a driven arm 204, and the driven arm 204 is limitedly slidably assembled in the lateral groove 102, so that during the rotation of the rotor disk 202, the plurality of driven arms thereon Driven by the driving arm 203, the arm 204 can slide directionally along the lateral groove 102, so that the slave arm 204 in the telescopic arm module can switch between the extended state and the retracted state, and when the slave arm 204 is in the telescopic state, the end of the slave arm 204 can abut against the inner wall of the oil and gas well, and a plurality of slave arms 204 are synchronously abutted against the inner wall of the oil and gas well, so that the device as a whole is kept in the middle position of the oil and gas well to prevent it from colliding and scratching with the inner wall of the oil and gas well during the process of rising or falling with the liquid level, and when a plurality of slave arms 204 abut against the inner wall of the oil and gas well, the telescopic arm module remains stationary with the oil and gas well under the interaction of forces, so that the device moves with the liquid level. In the process, the telescopic arm module slides relative to the main shell 101 in the third direction z, and during the sliding process of the telescopic arm modules relative to the main shell 101, the distance of relative movement can be recorded and transmitted to the controller on the ground through optical fiber, and when one group of telescopic arm modules moves to the extreme position, it can automatically switch from the extended state to the retracted state, and control the other group of telescopic arm modules to switch to the extended state, so that the two groups of telescopic arm modules can move alternately during the movement of the liquid level monitoring device with the liquid level, thereby recording the change process of the liquid level and ensuring that the device is always located in the middle of the oil and gas well to prevent scratches against the inner wall of the oil and gas well during movement, and to avoid tipping or jamming of the device.

[0035] See also Figure 2 and Figure 3, in a preferred embodiment of the present invention, the housing member 1 further includes a floating box 103, a bracket 104, a winding drum 105, an optical encoder disc 106, and a bundling port 107. The floating box 103 is fixedly arranged at the bottom of the main housing 101, the bracket 104 is arranged on the top of the main housing 101, the winding drum 105 is rotatably assembled on the bracket 104, the optical encoder disc 106 is fixedly arranged on one side of the bracket 104 and is in transmission connection with the winding drum 105, the bundling port 107 is arranged on the top of the main housing 101, and the optical fiber passes through the bundling port 107 and is wound around the winding drum 105. One end of the optical fiber is electrically connected to the optical encoder disc 106, and the other end of the optical fiber is electrically connected to the terminal controller.

[0036] In actual application of this embodiment, the floating box 103 is arranged at the bottom of the main housing 101 to make the whole device float on the liquid surface end. The bracket 104 is fixedly arranged on the top of the main housing 101. The winding drum 105 is rotatably assembled on the bracket 104, and the winding drum 105 is in transmission connection with the two telescopic arm modules, so that the telescopic arm modules can synchronously drive the winding drum 105 to rotate during the movement process, and then the winding drum 105 records the rotation direction and the number of rotation turns in the optical encoder disc 106, and transmits the signal to the controller at the ground end through the optical fiber wound around the winding drum 105.

[0037] Please refer to Figure 4 and Figure 5 , in a preferred embodiment of the present invention, the housing member 1 further includes a limiting rod 108. The limiting rod 108 is fixedly arranged at one end of the lateral groove 102. The telescopic mechanism 2 further includes a limiting groove 205, a sleeve rod 206, and anti-slip teeth 207. The limiting groove 205 is arranged on the driven arm 204 and is in limiting sliding assembly with the limiting rod 108. The sleeve rod 206 is elastically inserted and slid at the end of the driven arm 204, and the anti-slip teeth 207 are fixedly assembled at the end of the sleeve rod 206.

[0038] In actual application of this embodiment, the limiting rod 108 is fixedly arranged on one side of the lateral groove 102, and the limiting groove 205 is in limiting sliding assembly with the limiting rod 108. When the rotor disc 202 rotates, the driven arm 204 slides along the limiting rod 108 synchronously, so as to limit the movement directions of several driven arms 204, and then control the telescopic arm module to switch between the extended state and the retracted state. The sleeve rod 206 is elastically inserted and slid at the end of the driven arm 204, and the anti-slip teeth 207 are also arranged at the end of the sleeve rod 206. When the driven arm 204 moves towards the inner wall side of the oil and gas well, during the process that the anti-slip teeth 207 abut against the inner wall of the oil and gas well, the sleeve rod 206 can be synchronously driven to elastically slide on the driven arm 204, so that several anti-slip teeth 207 are elastically pressed against the inner wall side of the oil and gas well, thereby ensuring that the telescopic arm module in the extended state keeps stationary with the oil and gas well during the movement process of the device along with the liquid surface.

[0039] Please refer to Figure 5 In a preferred embodiment of the present embodiment, the telescopic mechanism 2 further includes an annular groove 208, a positioning rod 209, a toothed plate member 210, a first transmission gear 211, a side shaft 213, a side shaft 213, and a driving gear 214. The annular groove 208 is fixedly arranged at the outer wall end of the rotor disc 202. The positioning rod 209 is fixedly arranged in the first cavity a1 and the second cavity a2. One end of the toothed plate member 210 is slidably limited on the positioning rod 209, and the other end of the toothed plate member 210 is slidably assembled in the annular groove 208. The first transmission gear 211 and the second transmission gear 212 are fixedly arranged on the axis in the first cavity a1 and the second cavity a2, and one end of the first transmission gear 211 is meshed with the toothed plate member 210, and the other end of the first transmission gear 211 is in transmission connection with the second transmission gear 212. The side shaft 213 is fixedly assembled on the axis in the first cavity a1 and the second cavity a2 along the third direction z, and the side shaft 213 is respectively in transmission connection with two groups of the second transmission gears 212. A driving gear 214 is further arranged at the end of the side shaft 213, and the driving gear 214 is in transmission connection with the winding drum 105.

[0040] In actual application of the present embodiment, the annular groove 208 is fixedly arranged on the outer wall side of the rotor disc 202, and one end of the toothed plate member 210 is slidably limited on the positioning rod 209 along the third direction z, and the other end of the toothed plate member 210 is slidably assembled in the annular groove 208 along the xoy plane. When the rotor disc 202 moves along the third direction z, the toothed plate member 210 synchronously moves along the third direction z following the rotor disc 202 under the limitation of the annular groove 208. During the sliding process of the toothed plate member 210, the first transmission gear 211 arranged on one side thereof is meshed with the toothed plate member 210, so that the second transmission gear 212 in transmission connection with one end of the first transmission gear 211 rotates synchronously. During the rotation process of the second transmission gear 212, the side shaft 213 is driven to rotate synchronously. The side shaft 213 is respectively in transmission connection with two groups of telescopic arm modules, so that when the two groups of telescopic arm modules are in the extended state, both can drive the side shaft 213 to rotate, thereby driving the winding drum 105 to rotate by means of the driving gear 214 on the end side of the side shaft 213, and further recording the liquid level change process according to the relative displacement between the telescopic arm module and the main housing 101.

[0041] Please refer to Figure 9, in a preferred embodiment of the present invention, the third cavity a3 is disposed between the first cavity a1 and the second cavity a2, the transmission assembly 3 is disposed in the third cavity a3, the transmission assembly 3 includes a reversing shaft 301, a first reversing gear 302 and an adjusting gear 303, the reversing shaft 301 is fixedly disposed in the third cavity a3, the first reversing gear 302 is fixedly disposed on the reversing shaft 301, two groups of the adjusting gears 303 are fixedly disposed in the third cavity a3, and the two groups of adjusting gears 303 are respectively coaxially and fixedly connected to the guide shafts 201 in the two telescopic arm modules, and the first reversing gear 302 and the adjusting gear 303 are meshed with each other.

[0042] In actual application of this embodiment, the reversing shaft 301 is fixedly disposed in the third cavity a3, and the first reversing gear 302 fixedly assembled on the reversing shaft 301 is respectively meshed with the two groups of adjusting gears 303, so that the two groups of adjusting gears 303 drive the guide shafts 201 in the two telescopic arm modules to rotate in the opposite direction, and further the rotor discs 202 assembled on the two guide shafts 201 rotate in the opposite direction, thereby controlling the two telescopic arm modules to switch between the extended state and the retracted state.

[0043] Please refer to Figure 3 and Figure 9 , in a preferred embodiment of the present invention, the transmission assembly 3 further includes a second reversing gear 304, a first circumferential plate 305, a first push rod 306, a second circumferential plate 307 and a second push rod 308, the second reversing gear 304 is fixedly assembled on the reversing shaft 301, the first circumferential plate 305 is disposed in the first cavity a1, the first circumferential plate 305 is rotatably disposed around the rotor disc 202 in the circumferential direction, the end of the first circumferential plate 305 is further assembled with the first push rod 306, the first push rod 306 is slidably inserted into any one of the driving arms 203 in the first cavity a1, the second circumferential plate 307 is disposed in the second cavity a2, the second circumferential plate 307 is rotatably disposed around the rotor disc 202 in the circumferential direction, the end of the second circumferential plate 307 is further assembled with the second push rod 308, the second push rod 308 is slidably inserted into any one of the driving arms 203 in the second cavity a2, and the second reversing gear 304 is meshed with the first circumferential plate 305 and the second circumferential plate 307.

[0044] In actual application of this embodiment, the first circumferential plate 305 and the second circumferential plate 307 are respectively slidably disposed in the first cavity a1 and the second cavity a2, and both the first circumferential plate 305 and the second circumferential plate 307 are disposed around the rotor disk 202. Both the first circumferential plate 305 and the second circumferential plate 307 are meshed and connected with the second reversing gear 304, so that the reversing shaft 301 drives the second reversing gear 304 to rotate synchronously during rotation, and then drives the first circumferential plate 305 and the second circumferential plate 307 to rotate in opposite clockwise directions through the meshing of the second reversing gear 304. Since the first push rod 306 provided at the end of the first circumferential plate 305 is slidably inserted into the driving arm 203 of the telescopic arm module on the side of the first cavity a1, and the second push rod 308 provided at the end of the second circumferential plate 307 is slidably inserted into the driving arm 203 of the telescopic arm module on the side of the second cavity a2, during the rotation of the reversing shaft 301, it assists in driving the rotor disks 202 in the two telescopic arm modules to rotate in opposite clockwise directions, thereby switching the extended state and the retracted state of the two telescopic arm modules.

[0045] Please refer to Figure 9 , in a preferred embodiment of the present invention, the transmission assembly 3 further includes a magnetic shaft bar 309 and side magnetic blocks 310. The magnetic shaft bar 309 is coaxially and fixedly connected with the reversing shaft 301. The magnetic shaft bar 309 has opposite first end b1 and second end b2. Side magnetic blocks 310 are symmetrically arranged on both sides of the magnetic shaft bar 309, and the first end b1 and the second end b2 of the magnetic shaft bar 309 are magnetically connected to the two groups of side magnetic blocks 310 respectively.

[0046] In actual application of this embodiment, the magnetic shaft bar 309 is fixedly assembled on the reversing shaft 301, and the two ends of the magnetic shaft bar 309 have opposite first end b1 and second end b2. The first end b1 and the second end b2 are respectively magnetically adsorbed on the side magnetic blocks 310 on both sides. When the reversing shaft 301 rotates clockwise along the axis, when the first end b1 breaks away from the magnetic attraction of one side magnetic block 310, it can rotate towards the other side magnetic block 310 under the action of inertia, so that the first end b1 and the second end b2 are reversely magnetically connected to the two groups of side magnetic blocks 310. The same is true when the reversing shaft 301 rotates counterclockwise along the axis.

[0047] Please refer to Figure 3 and Figure 7, in a preferred embodiment of the present invention, the transmission assembly 3 further includes a reversing disc 311 and a middle plate strip 312. The reversing disc 311 is coaxially and fixedly connected to the reversing shaft 301. One side of the reversing disc 311 is fixedly equipped with a middle plate strip 312. The middle plate strip 312 has a first trigger surface c1 and a second trigger surface c2 opposite to each other. Two upper pulleys 313 are fixedly arranged on the first trigger surface c1. An upper synchronous belt 314 is assembled between the two groups of upper pulleys 313. An upper counterweight 315 and an upper fixing block 316 are respectively assembled on both sides of the upper synchronous belt 314. An upper trigger rod 317 is also fixedly assembled on the upper fixing block 316. Two lower pulleys 318 are fixedly arranged on the second trigger surface c2. A lower synchronous belt 319 is assembled between the two groups of lower pulleys 318. A lower counterweight 320 is independently assembled on the lower synchronous belt 319. A lower trigger rod 321 is fixedly arranged on the lower counterweight 320. The oil and gas well dynamic liquid level monitoring device further includes a measurement transmission mechanism 4. The measurement transmission mechanism 4 includes a reset rod 401, an upper measurement frame 402, a lower measurement frame 403, an upper trigger plate 404 and a lower trigger plate 405. The reset rod 401 is elastically inserted and slid along the third direction z on one side of the main housing 101. An upper measurement frame 402 and a lower measurement frame 403 are respectively fixedly assembled at both ends of the reset rod 401. The upper measurement frame 402 is arranged on one side of the telescopic arm module in the first cavity a1. The driven arm 204 in the first cavity a1 passes through the upper measurement frame 402. The lower measurement frame 403 is arranged on one side of the telescopic arm module in the second cavity a2. The driven arm 204 in the second cavity a2 passes through the lower measurement frame 403. An upper trigger plate 404 is further arranged at one end of the upper measurement frame 402. The upper trigger plate 404 is arranged close to one side of the upper trigger rod 317. A lower trigger plate 405 is further arranged at one end of the lower measurement frame 403. The lower trigger plate 405 is arranged close to one side of the lower trigger rod 321.

[0048] In actual application of this embodiment, an upper pulley 313 provided on the first trigger surface c1 is equipped with an upper synchronous belt 314. Both ends of the upper synchronous belt 314 are respectively equipped with an upper counterweight 315 and an upper fixing block 316. Since the commutator disk 311 and the commutator shaft 301 are coaxially and fixedly connected, and a magnetic shaft strip 309 is also fixedly provided on the commutator shaft 301, the commutator shaft 301 has two side rotation states in the axial direction, namely the left rotation state and the right rotation state. Taking the illustration as an example, when the commutator shaft 301 is in the left rotation state, the commutator disk 311 is synchronously in the left rotation state. When the middle plate strip 312 is in the left rotation state, the upper counterweight 315 slides along the first trigger surface c1 under the action of gravity, and the upper counterweight 315 drives the upper synchronous belt 314 to move synchronously during the sliding process, so that the upper fixing block 316 fixedly assembled on the upper synchronous belt 314 slides in the opposite direction to the upper counterweight 315. Since the mass of the upper counterweight 315 is greater than the mass of the upper fixing block 316, in the third direction z, the upper trigger rod 317 moves towards the high point position in the third direction z. When the upper trigger plate 404 on the side of the first trigger surface c1 moves towards the upper trigger rod 317, it can drive the commutator disk 311 to rotate in the opposite clockwise direction by pressing the upper trigger rod 317, thereby driving the commutator shaft 301 to switch to the right rotation state. During the process of the commutator shaft 301 switching to the right rotation state, the first commutator gear 302 and the second commutator gear 304 on the commutator shaft 301 synchronously drive the two telescopic arm modules to rotate, so that the first telescopic arm module that is in the extended state after moving to the limit position switches to the retracted state, and the second telescopic arm module in the retracted state switches to the extended state. After several driven arms 204 on the first telescopic arm module are separated from the inner wall of the oil and gas well during the retraction process, the rotor disk 202 in the first telescopic arm module automatically resets to the middle position of the first cavity a1 under the action of elastic force. At this time, the driven arms 204 on the side of the first telescopic arm module are separated from the upper measurement frame 402, so that the upper measurement frame 402 and the lower measurement frame 403 automatically reset in the third direction z following the reset rod 401. And at this time, the commutator disk 311 switches from the left rotation state to the right rotation state. When the upper trigger plate 404 moves along the third direction z again and abuts against the upper trigger rod 317, it can push the commutator disk 311 to rotate in the opposite clockwise direction, thereby enabling the commutator disk 311 to cycle between the left rotation or right rotation states. A lower synchronous belt 319 is assembled on a lower pulley 318 on the second trigger surface c2. When the lower counterweight 320 is in the left rotation state, the lower counterweight 320 slides to the lower position side under the action of gravity, so that when the lower trigger plate 405 moves towards the second trigger surface c2, the lower trigger plate 405 can drive the commutator disk 311 to rotate in the opposite clockwise direction. Thus, when the upper trigger plate 404 and the lower trigger plate 405 move in the third direction z,Both can drive the commutation disk 311 to cyclically switch between the left-handed state and the right-handed state. When the first telescopic arm module or the second telescopic arm module moves to the limit position, the commutation disk 311 is triggered to rotate, thereby switching the telescopic states of the two telescopic arm modules, so that the device can automatically rise and fall with the liquid level of the oil and gas well, and measure the liquid level data of the oil and gas well.

[0049] In the above embodiment of the present invention, an oil and gas well dynamic liquid level monitoring device is provided. By arranging two independent cavities inside the main housing 101 and movably assembling telescopic arm modules that operate alternately in the two cavities, it is possible to record the motion data during the process of following the rise and fall of the liquid level of the oil and gas well and real-time feedback it to the controller at the ground end. The device always moves in the middle of the oil and gas wellbore, effectively preventing the device from rubbing and colliding with the inner wall of the oil and gas well, resulting in the floating of the device being blocked and affecting the measurement accuracy.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil and gas well dynamic liquid level monitoring device, the oil and gas well dynamic liquid level monitoring device having opposite first, second, and third directions, characterized in that, The described oil and gas well dynamic liquid level monitoring device includes: A housing member, the housing member includes a main housing and lateral grooves. An independent first cavity, second cavity, and third cavity are provided inside the main housing. The first cavity and the second cavity are arranged in the inner cavity of the main housing along a third direction, and telescopic arm modules are independently arranged inside the first cavity and the second cavity. A plurality of lateral grooves are circumferentially arranged on the cavity walls of the first cavity and the second cavity; The telescopic arm module has opposite extended states and retracted states. The telescopic arm module includes a telescopic mechanism. The telescopic mechanism includes a guiding shaft, a rotor disk, a driving arm, and a driven arm. The guiding shaft is rotatably assembled in the first cavity and the second cavity. The rotor disk is slidably assembled on the guiding shaft along the third direction with circumferential limitation. A plurality of driving arms are also circumferentially arranged on the rotor disk. A driven arm is arranged at the end of the driving arm. One end of the driven arm is rotatably connected to the driving arm, and the other end of the driven arm is slidably inserted into the lateral groove; The telescopic arm module switches between the extended state and the retracted state, and the two sets of telescopic arm modules are respectively in the extended state and the retracted state.

2. The dynamic liquid level monitoring device for oil and gas wells according to claim 1, wherein The housing member further includes a floating box, a bracket, a winding drum, an optical code disk, and a bundling port. The floating box is fixedly arranged at the bottom of the main housing. The bracket is arranged on the top of the main housing. The winding drum is rotatably assembled on the bracket. The optical code disk is fixedly arranged on one side of the bracket and is in transmission connection with the winding drum. The bundling port is arranged on the top of the main housing. An optical fiber passes through the bundling port and is wound around the winding drum. One end of the optical fiber is electrically connected to the optical code disk, and the other end of the optical fiber is electrically connected to a terminal controller.

3. The dynamic liquid level monitoring device for oil and gas wells according to claim 1, characterized in that, The housing member further includes a limiting rod. The limiting rod is fixedly arranged at one end of the lateral groove. The telescopic mechanism further includes a limiting groove, a sleeve rod, and anti-slip teeth. The limiting groove is arranged on the driven arm and is slidably assembled on the limiting rod with circumferential limitation. The sleeve rod is elastically slidably inserted at the end of the driven arm, and anti-slip teeth are fixedly assembled at the end of the sleeve rod.

4. The dynamic liquid level monitoring device for oil and gas wells according to claim 2, wherein The telescopic mechanism further includes an annular groove track, a positioning rod, a toothed plate member, a first transmission gear, a side shaft, a side shaft, and a driving gear. The annular groove track is fixedly arranged at the outer wall end of the rotor disk. The positioning rod is fixedly arranged in the first cavity and the second cavity. One end of the toothed plate member is slidably arranged on the positioning rod with circumferential limitation, and the other end of the toothed plate member is slidably assembled in the annular groove track. The first transmission gear and the second transmission gear are fixedly arranged in the first cavity and the second cavity, and one end of the first transmission gear is meshed with the toothed plate member, and the other end of the first transmission gear is in transmission connection with the second transmission gear. The side shaft is fixedly assembled in the first cavity and the second cavity along the third direction, and the side shaft is respectively in transmission connection with the two sets of second transmission gears. A driving gear is also arranged at the end of the side shaft, and the driving gear is in transmission connection with the winding drum.

5. The dynamic liquid level monitoring device for oil and gas wells according to claim 1, characterized in that The third cavity is arranged between the first cavity and the second cavity, and the transmission assembly is arranged in the third cavity. The transmission assembly includes a reversing shaft, a first reversing gear, and an adjusting gear. The reversing shaft is fixedly arranged in the third cavity, and the first reversing gear is fixedly arranged on the reversing shaft. Two groups of the adjusting gears are fixedly arranged in the third cavity, and the two groups of adjusting gears are coaxially and fixedly connected to the guide shafts in the two telescopic arm modules respectively. The first reversing gear and the adjusting gear are meshed with each other.

6. The dynamic liquid level monitoring device for oil and gas wells according to claim 5, characterized in that The transmission assembly further includes a second reversing gear, a first circumferential plate, a first push rod, a second circumferential plate, and a second push rod. The second reversing gear is fixedly assembled on the reversing shaft. The first circumferential plate is arranged in the first cavity and is rotatably arranged around the rotor disc in the circumferential direction. A first push rod is further assembled at the end of the first circumferential plate. The first push rod is slidably inserted into any one of the driving arms in the first cavity. The second circumferential plate is arranged in the second cavity and is rotatably arranged around the rotor disc in the circumferential direction. A second push rod is further assembled at the end of the second circumferential plate. The second push rod is slidably inserted into any one of the driving arms in the second cavity. The second reversing gear is meshed with the first circumferential plate and the second circumferential plate.

7. The dynamic liquid level monitoring device for oil and gas wells according to claim 5, characterized in that The transmission assembly further includes a magnetic shaft bar and side magnetic blocks. The magnetic shaft bar is coaxially and fixedly connected to the reversing shaft. The magnetic shaft bar has opposite first and second ends. Side magnetic blocks are symmetrically arranged on both sides of the magnetic shaft bar, and the first end and the second end of the magnetic shaft bar are magnetically connected to the two groups of side magnetic blocks respectively.

8. The dynamic liquid level monitoring device for oil and gas wells according to claim 5, characterized in that, The transmission assembly further includes a reversing disc and a middle plate bar. The reversing disc is coaxially and fixedly connected to the reversing shaft. A middle plate bar is fixedly assembled on one side of the reversing disc. The middle plate bar has opposite first triggering surfaces and second triggering surfaces.

9. The dynamic liquid level monitoring device for oil and gas wells according to claim 8, characterized in that, Two upper pulleys are fixedly arranged on the first triggering surface. An upper synchronous belt is assembled between the two groups of upper pulleys. An upper counterweight block and an upper fixing block are respectively assembled on both sides of the upper synchronous belt. An upper triggering rod is further fixedly assembled on the upper fixing block. Two lower pulleys are fixedly arranged on the second triggering surface. A lower synchronous belt is assembled between the two groups of lower pulleys. A lower counterweight block is independently assembled on the lower synchronous belt. A lower triggering rod is fixedly arranged on the lower counterweight block.

10. The dynamic liquid level monitoring device for oil and gas wells according to claim 1, characterized in that, The dynamic liquid level monitoring device for the oil and gas well further includes a measurement drive mechanism. The measurement drive mechanism includes a reset rod, an upper measurement frame, a lower measurement frame, an upper trigger plate, and a lower trigger plate. The reset rod is elastically inserted and slid along a third direction on one side of the main housing. The two ends of the reset rod are respectively fixedly assembled with the upper measurement frame and the lower measurement frame. The upper measurement frame is arranged on one side of the telescopic arm module in the first cavity, and the driven arm in the first cavity passes through the upper measurement frame. The lower measurement frame is arranged on one side of the telescopic arm module in the second cavity, and the driven arm in the second cavity passes through the lower measurement frame. One end of the upper measurement frame is further provided with an upper trigger plate, and the upper trigger plate is arranged close to one side of the upper trigger rod. One end of the lower measurement frame is further provided with a lower trigger plate, and the lower trigger plate is arranged close to one side of the lower trigger rod.

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