Coal bed gas horizontal well sand and pulverized coal bailing device and process thereof

Abstract

The coal bed gas horizontal well sand and pulverized coal bailing device comprises a crawling traction assembly and a bailing assembly and further comprises a grabbing assembly. The crawling traction assembly moves in the horizontal well and provides support for the grabbing assembly, so that the grabbing assembly stably operates in the horizontal well, the grabbing assembly is used for grabbing and crushing accumulated sand and accumulated coal in the horizontal well, and a swing assembly, an adjusting assembly and an impact assembly are installed between the grabbing assembly and the crawling traction assembly. The device has the advantages that when accumulated sand and accumulated coal in a horizontal well are fished out, the accumulated sand and the accumulated coal are crushed in a grabbing mode, and the accumulated sand and the accumulated coal are impacted and shattered in the grabbing process, so that the accumulated sand and the accumulated coal are sucked out more easily, sand and coal powder are fished out more thoroughly, and the working efficiency is improved. In addition, in the grabbing process, only the grabbing assembly needs to move in a reciprocating mode, and the probability of collapse of the horizontal well can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coalbed methane mining, and in particular to a device for bailing sand and coal powder in a coalbed methane horizontal well and a process thereof. Background Art

[0002] Coalbed methane is a form of natural gas that mainly exists in coal seams. It is produced by the pyrolysis process of organic matter in coal seams on a geological time scale and is usually adsorbed in the pores and cracks of coal. Coalbed methane horizontal wells are an oil and gas exploration and development method that uses horizontal drilling technology to extract coalbed methane.

[0003] The quartz sand and coal powder discharged during the drainage of coalbed methane have caused great difficulties for the drainage. In traditional technology, sand and coal powder are generally removed by flushing sand and coal powder, which has a huge impact on the disturbance of the horizontal well formation. Therefore, the publication number CN220909644U discloses an L-type coalbed methane horizontal well coal powder bailing device, which includes an upper joint, a floating valve, a sand bailing pump, a fixed valve, a sand guide pipe and a sand shovel that are coaxially connected in sequence from top to bottom; the floating valve includes a floating valve cover body, a first valve seat is arranged at the lower part of the floating valve cover body, a first valve ball that can move axially along the floating valve cover body is arranged on the first valve seat, and a first valve ball reset device is arranged above the first valve ball; the fixed valve includes a fixed valve cover body, a second valve seat is arranged in the fixed valve cover body, a second valve ball that can move axially along the fixed valve cover body is arranged on the second valve seat, and a second valve ball reset device is arranged above the second valve ball; the sand shovel is a trumpet-shaped structure with an opening that gradually decreases from bottom to top.

[0004] The above-mentioned coal powder scooping device adopts a sand shovel with a trumpet-shaped structure, which is conducive to cleaning the sand and coal powder at the bottom of the well and ensuring that the oil pipe at the rear is not stuck; when the coal powder scooping device is used in the inclined section or the horizontal section, with the help of the designed valve ball resetting device, especially with the help of the elastic force of the spring, the first valve ball and the second valve ball can be forced to reset. Therefore, the utility model is suitable for sand scooping operations in vertical well sections, inclined sections, and horizontal sections.

[0005] However, when the above-mentioned coal powder scooping device is used in specific use, a sand shovel is used to crush the quartz sand and coal powder accumulated in the horizontal well, and then the crushed quartz sand and coal powder are extracted by a sand pump. This process requires pulling the oil pipe up and down many times to generate impact force between the sand shovel and the quartz sand and coal powder, so as to shovel the quartz sand and coal powder from the inner wall of the horizontal well. The labor intensity is large, and the repeated movement of the oil pipe may cause the inner wall of the horizontal well to collapse. In addition, the quartz sand and coal powder that are shoveled off may be in blocks, and the sand pump cannot suck out the blocky quartz sand and coal powder, resulting in incomplete sand scooping.

[0006] Therefore, a novel coalbed methane horizontal well sand and coal powder bailing device can be adopted to solve the shortcomings of the prior art. Summary of the invention

[0007] The purpose of the present invention is to solve the problem in the prior art that sand bailing is not thorough and may cause the inner wall of the horizontal well to collapse, and to propose a device for bailing sand and coal powder in a coalbed methane horizontal well and a process thereof.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A device for bailing sand and coal powder in a coalbed methane horizontal well, comprising a crawling and traction component and a bailing component, and also comprising a grabbing component; The crawling and traction assembly moves in the horizontal well and provides support for the grabbing assembly so that the grabbing assembly can operate stably in the horizontal well. The grabbing assembly is used to grab and crush the accumulated sand and coal in the horizontal well. A swing assembly, an adjustment assembly and an impact assembly are installed between the grabbing assembly and the crawling and traction assembly. The swing assembly is used to change the direction of the grab assembly so that the grab assembly swings in the horizontal well to grab the sand and coal deposits on the inner wall of the horizontal well; The adjusting component is used to adjust the position of the grabbing component to ensure that the grabbing component abuts against the inner wall of the horizontal well, and is suitable for horizontal wells of different sizes; The impact assembly causes the grab assembly to reciprocate, generating an impact force on the sand and coal accumulation in the horizontal well, thereby accelerating the crushing of the sand and coal accumulation; The scooping assembly cooperates with the grabbing assembly to extract and store the accumulated sand and coal after being crushed by the grabbing assembly.

[0009] Preferably, the crawling traction assembly comprises a frame, a plurality of support frames are rotatably mounted on the frame, a roller is rotatably mounted on each of the support frames, wherein a second motor is fixedly mounted on two of the support frames, and the two driving ends of the second motors are connected to the corresponding rollers via a second bevel gear set; Two sliding frames are slidably mounted on the frame, and a plurality of support rods are rotatably mounted on the two sliding frames. Each support rod is rotatably connected to the corresponding support frame, and a moving mechanism matched with the two sliding frames is mounted on the frame.

[0010] Preferably, the moving mechanism includes a first motor with a dual-axis drive fixedly mounted on a frame, two screw rods rotatably mounted on the frame, the two screw rods are fixedly connected to the driving shafts corresponding to the first motor, a nut is threadedly rotatably mounted on the two screw rods, the two nuts are fixedly connected to the corresponding sliding frames, and the two screw rods pass through the corresponding sliding frames.

[0011] Preferably, the grabbing assembly includes a frame, a plurality of shafts are rotatably mounted on the frame, a clamp is fixedly mounted on each of the shafts, a plurality of electric push rods are rotatably mounted on the frame, the telescopic end of each electric push rod is rotatably connected to the corresponding clamp, a crushing ball is rotatably mounted on the frame, and a driving mechanism is installed between each of the shafts and the crushing ball.

[0012] Preferably, the driving mechanism includes a shaft rotatably mounted on a frame, each shaft is fixedly mounted with a second toothed disc, a gear ring meshing with the second toothed disc is fixedly mounted on the crushing ball, and the shaft is connected to the shaft body via a first bevel gear set.

[0013] Preferably, the scooping assembly comprises a sand storage pipe fixedly mounted on the frame, the sand storage pipe is fixedly connected with a sand scooping pump pipe matched with the grabbing assembly, and a sand scooping pump is fixedly mounted in the sand scooping pump pipe.

[0014] Preferably, the swing assembly comprises a fixing plate fixedly mounted on the frame, a motor 1 is fixedly mounted on the fixing plate, and a support plate is fixedly mounted on the driving end of the motor 1; A limiting slide bar is rotatably mounted on the support plate, an arc-shaped limiting rail is fixedly mounted on the fixed plate, and the limiting slide bar slides in the arc-shaped limiting rail to support the support plate.

[0015] Preferably, the adjustment component includes a second motor fixedly mounted on a support plate, a gear cylinder is rotatably mounted on the support plate, and a second motor is fixedly mounted on the support plate, a driving end of the second motor is fixedly connected to the gear cylinder, a screw is fixedly mounted on the support plate, a threaded sleeve is threadedly rotatably mounted on the screw, a first gear disk meshing with the gear cylinder is fixedly mounted on the threaded sleeve, a fixing plate is rotatably mounted on the threaded sleeve, and a mounting frame is fixedly mounted on the fixing plate.

[0016] Preferably, the impact assembly includes a third disc fixedly mounted on the frame, the first disc is fixedly mounted on the mounting frame via a plurality of first connecting rods, a motor three is fixedly mounted on the mounting frame, an elastic telescopic rod is fixedly mounted on the first disc, a second disc is fixedly mounted on the telescopic end of the elastic telescopic rod, a conical spring is fixedly mounted on the second disc, the conical spring and the third disc are fixedly connected, a plurality of second connecting rods are fixedly mounted on the second disc, each of the second connecting rods passes through the first disc and is slidably connected to the first disc, a protruding disc is commonly fixedly mounted on one end of the plurality of second connecting rods away from the second disc, an eccentric frame is fixedly mounted on the driving end of the motor three, and a pressure wheel matching the protruding disc is rotatably mounted on the eccentric frame.

[0017] The present invention also provides a process for bailing sand and coal powder in a coalbed methane horizontal well, comprising the above-mentioned device for bailing sand and coal powder in a coalbed methane horizontal well, and further comprising the following steps: S1. First, the device is placed in a horizontal well. Then, the size of the crawling and traction assembly is adjusted to allow the crawling and traction assembly to move freely in the horizontal well and stop at any position in the horizontal well. The external oil pipe is connected to the catching assembly. As the crawling and traction assembly operates, the oil pipe is lowered into the horizontal well. S2. With the operation of the crawling and traction assembly, the grabbing assembly moves toward the bottom of the horizontal well until the grabbing assembly reaches the position of the sand and coal accumulation in the horizontal well. At this time, the position of the grabbing assembly is adjusted by the adjusting assembly so that the grabbing assembly is offset against the sand and coal accumulation in the horizontal well, and then the grabbing assembly is started to grab and crush the sand and coal accumulation in the horizontal well; S3. During the crushing process, the direction of the grabbing assembly is changed by the swing assembly, so that the grabbing assembly performs an arc-shaped swing motion along the inner wall of the horizontal well, thereby grabbing and crushing the accumulated sand and coal in the horizontal well at different positions on the inner wall of the horizontal well; S4. In addition, during the operation of the grabbing assembly, the impact assembly drives the grabbing assembly to move back and forth in the horizontal well, so that the grabbing assembly impacts the sand and coal accumulation in the horizontal well, so that the block-shaped sand and coal accumulation are broken faster; S5. With the operation of the grabbing assembly, the accumulated sand and coal in the horizontal well are broken. At this time, the crushed accumulated sand and coal are extracted and sucked out by the bailing assembly to complete the sand and coal dust bailing operation.

[0018] Compared with the prior art, the present invention has the following advantages: 1. When the device is used to remove the sand and coal accumulation in the horizontal well, the grabbing component is used to grab and crush the sand and coal accumulation in the horizontal well, and then the crushed sand and coal accumulation are removed by the grabbing component, effectively avoiding the situation where the block sand and coal accumulation cannot be discharged, making the sand and coal powder removal more thorough.

[0019] 2. When the device is used to remove the accumulated sand and coal in the horizontal well, the direction of the grabbing component is changed by the swinging component, so that the grabbing component moves along the inner wall of the horizontal well, so that the grabbing component can contact the accumulated sand and coal in the horizontal well more fully, and the sand and coal powder can be removed more thoroughly.

[0020] 3. When the device is used to scoop up the accumulated sand and coal in the horizontal well, the position of the grabbing component is adjusted by adjusting the component, and the radius of the grabbing component when swinging is changed, so as to meet the needs of horizontal wells of different sizes and have a wider range of applications. In addition, the pressure between the grabbing component and the inner wall of the horizontal well can be adjusted to improve the efficiency of scooping up sand and coal powder.

[0021] 4. When the device is scooping out the accumulated sand and coal in the horizontal well, the impact component is used to drive the grabbing component to move back and forth in the horizontal well, thereby generating an impact force on the accumulated sand and coal in the horizontal well, accelerating the crushing of the accumulated sand and coal in the horizontal well, and improving the efficiency of scooping out the sand and coal powder. In addition, the grabbing component is moved back and forth alone without the need for the oil pipe to move back and forth, so the pipe wall of the vertical section of the horizontal well can be protected, thereby reducing the probability of internal collapse of the horizontal well.

[0022] In summary, the present invention adopts a grabbing method to crush the accumulated sand and coal when scooping out the accumulated sand and coal in the horizontal well. During the grabbing process, the accumulated sand and coal are impacted and shattered, so that the accumulated sand and coal are easier to be sucked out, and the scooping of sand and coal powder is more thorough. In addition, during the grabbing process, only the grabbing component needs to move back and forth, which can effectively reduce the probability of horizontal well collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein: Figure 1 A schematic diagram of the structure of a device for bailing sand and coal powder in a coalbed methane horizontal well proposed by the present invention; Figure 2 for Figure 1 Detailed schematic diagram of the structure after being rotated to a certain angle; Figure 3 for Figure 1 An enlarged structural schematic detail diagram of the middle crawling traction assembly; Figure 4 for Figure 2 A detailed diagram showing the enlarged structure of the middle sand storage pipe, sand bailing pump pipe, grab assembly and swing assembly; Figure 5 for Figure 4 Detailed schematic diagram of the structure after being rotated to a certain angle; Figure 6 for Figure 5 An enlarged schematic diagram of the structure after the sand storage pipe and the sand bailing pump pipe are removed and rotated to a certain angle; Figure 7 for Figure 6 An enlarged structural schematic detail diagram of the middle swing assembly; Figure 8 for Figure 7 Detailed schematic diagram of the structure after being rotated to a certain angle; Fig. 9 for Figure 6 A schematic detailed diagram of the enlarged structure of the middle adjustment component; Fig.10 for Figure 6 A schematic detailed diagram of the enlarged structure of the middle impact assembly; Fig.11 for Fig.10Detailed schematic diagram of the structure after being rotated to a certain angle; Fig.12 for Figure 6 A schematic diagram of the enlarged structure of the grabbing assembly; Fig.13 for Fig.12 Detailed schematic diagram of the exploded structure; Fig.14 for Fig.13 A schematic detailed diagram of the structure after removing the second disc, the third disc and the conical spring; Fig.15 for Fig.14 Detailed schematic diagram of the structure after being rotated to a certain angle; Fig.16 for Fig.14 Only one of the clamping jaws and the detailed structural diagram of the electric push rod are retained.

[0024] In the figure: 1 crawling traction component, 2 sand storage pipe, 3 sand bailing pump pipe, 4 grabbing component, 5 swing component, 6 frame, 7 screw rod, 8 first motor, 9 support frame, 10 roller, 11 second motor, 12 support rod, 13 sliding frame, 14 motor one, 15 impact component, 16 adjustment component, 17 support plate, 18 fixed plate, 19 arc limit rail, 20 limit slide rod, 21 motor two, 22 gear cylinder, 23 screw rod, 24 first gear disc, 25 threaded sleeve, 26 mounting frame, 27 motor three, 28 first disc, 29 second disc, 30 raised disc, 31 first connecting rod, 32 second connecting rod, 33 elastic telescopic rod, 34 pressing wheel, 35 conical spring, 36 third disc, 37 frame, 38 clamping claw, 39 electric push rod, 40 crushing ball, 41 first bevel gear set, 42 gear ring, 43 second gear disc. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1: Reference Figure 1-Figure 5 , Figure 12-16 , a device for bailing sand and coal powder in a coalbed methane horizontal well, comprising a crawling and traction component 1 and a bailing component, and also comprising a grabbing component 4; The crawling and traction assembly 1 moves in the horizontal well and provides support for the grabbing assembly 4 so that the grabbing assembly 4 can operate stably in the horizontal well. The grabbing assembly 4 is used to grab and crush the accumulated sand and coal in the horizontal well. A swing assembly 5, an adjustment assembly 16 and an impact assembly 15 are installed between the grabbing assembly 4 and the crawling and traction assembly 1.

[0027] The crawling traction assembly 1 includes a frame 6, on which a plurality of support frames 9 are rotatably mounted, and on each support frame 9 a roller 10 is rotatably mounted, wherein two support frames 9 are fixedly mounted with second motors 11, and the driving ends of the two second motors 11 are connected to the corresponding rollers 10 via a second bevel gear set; Two sliding frames 13 are slidably mounted on the frame 6 , and a plurality of struts 12 are rotatably mounted on the two sliding frames 13 . Each strut 12 is rotatably connected to the corresponding support frame 9 , and a moving mechanism matching the two sliding frames 13 is mounted on the frame 6 .

[0028] The moving mechanism includes a first motor 8 with a dual-axis drive fixedly mounted on a frame 6, two screw rods 7 rotatably mounted on the frame 6, the two screw rods 7 are fixedly connected to the drive shafts corresponding to the first motor 8, a nut is threadedly rotatably mounted on the two screw rods 7, the two nuts are fixedly connected to the corresponding sliding frames 13, and the two screw rods 7 pass through the corresponding sliding frames 13.

[0029] Put the crawling and traction assembly 1 into the horizontal well, and then start the first motor 8. The rotation of the driving end of the first motor 8 will drive the screw rod 7 to rotate, thereby driving the nut to move on the screw rod 7. The movement of the nut drives the sliding frame 13 to move. The movement of the sliding frame 13 will change the opening angle of the support frame 9 through the support rod 12, so that the roller 10 on the support frame 9 is against the inner wall of the horizontal well, thereby completing the fixing of the crawling and traction assembly 1; If the crawling and traction assembly 1 needs to move in the horizontal well, it only needs to start the second motor 11 inside the crawling and traction assembly 1. The second motor 11 will drive the roller 10 to rotate through the second bevel gear set, so as to realize the movement of the crawling and traction assembly 1.

[0030] Two of the rollers 10 are driving wheels, and the other rollers 10 have a locking function and can be locked. After the rollers 10 are locked, they cannot move in the horizontal well under the action of gravity.

[0031] The grabbing assembly 4 includes a frame 37, on which a plurality of shafts are rotatably mounted, on each of which a clamp 38 is fixedly mounted, and on which a plurality of electric push rods 39 are rotatably mounted, and the telescopic end of each electric push rod 39 is rotatably connected to the corresponding clamp 38, and on which a crushing ball 40 is rotatably mounted, and a driving mechanism is installed between each shaft and the crushing ball 40.

[0032] Insert the jaws 38 into the accumulated sand and coal powder, then start the electric push rod 39. The extension of the electric push rod 39 will drive the jaws 38 and the shaft to rotate, wrapping the accumulated sand and coal powder in the jaws 38. As the jaws 38 grab, the blocky accumulated sand and coal powder will be crushed.

[0033] The driving mechanism includes shafts rotatably mounted on the frame 37 , each shaft is fixedly mounted with a second toothed disc 43 , a gear ring 42 meshing with the second toothed disc 43 is fixedly mounted on the crushing ball 40 , and the shaft is connected to the shaft body via a first bevel gear set 41 .

[0034] As the shaft body rotates, the shaft rod is driven to rotate through the first bevel gear set 41, and the rotation of the shaft rod drives the second toothed disc 43 fixedly connected thereto to rotate, and the rotation of the second toothed disc 43 drives the gear ring 42 meshing therewith to rotate, thereby driving the crushing ball 40 to rotate. There are many sharp protrusions on the surface of the crushing ball 40. The rotation of the crushing ball 40 will further crush the captured accumulated sand and coal powder, which not only speeds up the crushing efficiency, but also makes the crushed particles smaller and easier to suck out.

[0035] Embodiment 2: This embodiment is different from the embodiment 1 in that: Figure 1-Figure 2 , Figure 4-Figure 13 The swing assembly 5 is used to change the direction of the grab assembly 4 so that the grab assembly 4 swings in the horizontal well to grab the accumulated sand and coal on the inner wall of the horizontal well.

[0036] The swing assembly 5 includes a fixed plate 18 fixedly mounted on the frame 6, a motor 14 is fixedly mounted on the fixed plate 18, and a support plate 17 is fixedly mounted on the driving end of the motor 14; A limit slide bar 20 is rotatably mounted on the support plate 17 , and an arc-shaped limit rail 19 is fixedly mounted on the fixed plate 18 . The limit slide bar 20 slides in the arc-shaped limit rail 19 to support the support plate 17 .

[0037] The rotation of the driving end of the motor 14 (reciprocating within a certain angle) will drive the support plate 17 fixedly connected thereto to rotate, and the rotation of the support plate 17 drives the grab assembly 4 to make a reciprocating circular motion of a certain arc, and the accumulated sand and coal powder adhering to the inner wall of the horizontal well are scraped off by the rotation; As the support plate 17 rotates, the limit slide bar 20 will be driven to roll in the arc limit rail 19, and the load-bearing force of the support plate 17 on the driving end of the motor 14 will be offset by the pressing support force between the limit slide bar 20 and the arc limit rail 19. In this way, the weight of the support plate 17 and the centrifugal force of the swing will be borne by the limit slide bar 20 and the arc limit rail 19, and the driving end of the motor 14 will not bear gravity and centrifugal force, so the motor 14 can be protected and the working efficiency of the motor 14 can be ensured.

[0038] refer to Fig. 9 The adjusting component 16 is used to adjust the position of the grabbing component 4 to ensure that the grabbing component 4 abuts against the inner wall of the horizontal well, and is suitable for horizontal wells of different sizes.

[0039] The adjustment assembly 16 includes a second motor 21 fixedly mounted on the support plate 17, a gear cylinder 22 is rotatably mounted on the support plate 17, and the second motor 21 is fixedly mounted on the support plate 17, a driving end of the second motor 21 is fixedly connected to the gear cylinder 22, a screw rod 23 is fixedly mounted on the support plate 17, a threaded sleeve 25 is threadedly rotatably mounted on the screw rod 23, a first toothed disc 24 meshing with the gear cylinder 22 is fixedly mounted on the threaded sleeve 25, a fixing plate is rotatably mounted on the threaded sleeve 25, and a mounting frame 26 is fixedly mounted on the fixing plate.

[0040] Start the second motor 21, the driving end of the second motor 21 rotates to drive the gear cylinder 22 fixedly connected thereto to rotate, the gear cylinder 22 rotates to drive the first gear disc 24 meshing therewith to rotate, the first gear disc 24 rotates to drive the threaded sleeve 25 fixedly connected thereto to rotate, so that the threaded sleeve 25 moves on the screw rod 23. Since the gear cylinder 22 is used, when the threaded sleeve 25 moves, the first gear disc 24 always meshes with the gear cylinder 22; The movement of the threaded sleeve 25 drives the mounting frame 26 to move. A telescopic rod is installed between the mounting frame 26 and the support plate 17 to limit the support plate 17 and prevent the threaded sleeve 25 from rotating and driving the mounting frame 26 to rotate. This part adjusts the distance between the grab assembly 4 and the central axis of the frame 6, thereby changing the swing radius of the grab assembly 4, and is suitable for horizontal wells of different sizes.

[0041] refer to Fig.10 , Fig.11 The impact assembly 15 causes the grab assembly 4 to reciprocate, generating an impact force on the sand and coal accumulation in the horizontal well, thereby accelerating the crushing of the sand and coal accumulation.

[0042] The impact assembly 15 includes a third disc 36 fixedly mounted on a frame body 37, a first disc 28 fixedly mounted on the mounting frame 26 via a plurality of first connecting rods 31, a motor 3 27 fixedly mounted on the mounting frame 26, an elastic telescopic rod 33 fixedly mounted on the first disc 28, a second disc 29 fixedly mounted on the telescopic end of the elastic telescopic rod 33, a conical spring 35 fixedly mounted on the second disc 29, the conical spring 35 and the third disc 36 are fixedly connected, a plurality of second connecting rods 32 fixedly mounted on the second disc 29, each second connecting rod 32 penetrates the first disc 28 and is slidably connected to the first disc 28, a protruding disc 30 is commonly fixedly mounted on one end of the plurality of second connecting rods 32 away from the second disc 29, an eccentric frame fixedly mounted on the driving end of the motor 3 27, a pressure wheel 34 matching the protruding disc 30 is rotatably mounted on the eccentric frame.

[0043] During the grabbing process, the motor 3 27 is started, and the driving end of the motor 3 27 rotates to drive the eccentric frame to rotate, thereby driving the pressing wheel 34 to make a circular motion, and the pressing wheel 34 will abut against the raised disk 30, so that the raised disk 30 moves (there are multiple protrusions on the raised disk 30, and when the pressing wheel 34 abuts against the protrusions, the raised disk 30 will be pressed to move, and when the pressing wheel 34 moves between two protrusions, the raised disk 30 will be reset under the action of the elastic telescopic rod 33, so as to achieve the purpose of reciprocating movement), the movement of the raised disk 30 will drive the second disc 29 to move through the second connecting rod 32 (the second connecting rod 32 will slide on the first disc 28), and the movement of the second disc 29 will drive the conical spring 35 and the third disc 36 to move, thereby driving the grabbing component 4 to move; The conical spring 35 can deflect the grab assembly 4 to a certain extent, and is used for turning at a turning point, and has a certain buffering effect. At the same time, the purpose of using the conical spring 35 instead of the cylindrical spring is that the conical spring 35 has higher strength and better toughness, and its shock resistance is better.

[0044] refer to Figure 1-Figure 2 , Figure 4-Figure 5 The scooping assembly cooperates with the grabbing assembly 4 to extract and store the accumulated sand and coal after being crushed by the grabbing assembly 4.

[0045] The scooping assembly comprises a sand storage pipe 2 fixedly mounted on a frame 6 , the sand storage pipe 2 is fixedly connected with a sand scooping pump pipe 3 matched with a grabbing assembly 4 , and a sand scooping pump is fixedly mounted in the sand scooping pump pipe 3 .

[0046] After the grabbing assembly 4 has crushed the accumulated sand and coal powder, the sand bailing pump is started to suck out the accumulated sand and coal powder in the horizontal well through the sand bailing pump pipe 3 and then put them into the sand storage pipe 2 for storage.

[0047] The specific operation steps of this device are as follows: First, the device is placed in a horizontal well, and then the crawling and traction assembly 1 is adjusted in size to allow the crawling and traction assembly 1 to move freely in the horizontal well and stop at any position in the horizontal well. The external oil pipe is connected to the catching assembly, and the oil pipe is lowered into the horizontal well as the crawling and traction assembly 1 operates; As the crawling and traction assembly 1 operates, the grab assembly 4 moves toward the bottom of the horizontal well until the grab assembly 4 reaches the position of the sand and coal accumulation in the horizontal well. At this time, the position of the grab assembly 4 is adjusted by the adjustment assembly 16, so that the grab assembly 4 is offset against the sand and coal accumulation in the horizontal well, and then the grab assembly 4 is started to grab and crush the sand and coal accumulation in the horizontal well. During the crushing process, the direction of the grabbing assembly 4 is changed by the swing assembly 5, so that the grabbing assembly 4 makes an arc-shaped swing motion along the inner wall of the horizontal well, so as to grab and crush the sand and coal accumulated in the horizontal well at different positions on the inner wall of the horizontal well; In addition, during the operation of the grabbing assembly 4, the impact assembly 15 drives the grabbing assembly 4 to move back and forth in the horizontal well, so that the grabbing assembly 4 impacts the sand and coal accumulation in the horizontal well, so that the block-shaped sand and coal accumulation are broken more quickly; With the operation of the grabbing assembly 4, the accumulated sand and coal in the horizontal well are broken, and the crushed accumulated sand and coal are then extracted and sucked out by the bailing assembly to complete the sand and coal dust bailing operation.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for bailing sand and coal powder in a coalbed methane horizontal well, comprising a crawling and traction assembly (1) and a bailing assembly, characterized in that: Also included is a grabbing component (4); The crawling and traction assembly (1) moves in the horizontal well and provides support for the grabbing assembly (4), so that the grabbing assembly (4) can operate stably in the horizontal well. The grabbing assembly (4) is used to grab and crush the accumulated sand and coal in the horizontal well. A swing assembly (5), an adjustment assembly (16) and an impact assembly (15) are installed between the grabbing assembly (4) and the crawling and traction assembly (1); The swing assembly (5) is used to change the direction of the grab assembly (4) so ​​that the grab assembly (4) swings in the horizontal well to grab the sand and coal deposits on the inner wall of the horizontal well; The adjusting component (16) is used to adjust the position of the grabbing component (4) to ensure that the grabbing component (4) abuts against the inner wall of the horizontal well, and is suitable for horizontal wells of different sizes; The impact assembly (15) causes the grab assembly (4) to reciprocate, thereby generating an impact force on the sand and coal accumulation in the horizontal well, thereby accelerating the crushing of the sand and coal accumulation; The scooping assembly cooperates with the grabbing assembly (4) to extract and store the accumulated sand and coal after being crushed by the grabbing assembly (4).

2. The device for bailing sand and coal powder in a coalbed methane horizontal well according to claim 1, characterized in that: The crawling traction assembly (1) comprises a frame (6), a plurality of support frames (9) are rotatably mounted on the frame (6), a roller (10) is rotatably mounted on each of the support frames (9), a second motor (11) is fixedly mounted on two of the support frames (9), and the driving ends of the two second motors (11) are connected to the corresponding rollers (10) via a second bevel gear set; Two sliding frames (13) are slidably mounted on the frame (6), and a plurality of support rods (12) are rotatably mounted on the two sliding frames (13). Each of the support rods (12) is rotatably connected to a corresponding support frame (9), and a moving mechanism that cooperates with the two sliding frames (13) is mounted on the frame (6).

3. The device for bailing sand and coal powder in a coalbed methane horizontal well according to claim 2, characterized in that: The moving mechanism comprises a first motor (8) with a dual-axis drive fixedly mounted on a frame (6); two screw rods (7) are rotatably mounted on the frame (6); the two screw rods (7) are fixedly connected to drive shafts corresponding to the first motor (8); a nut is rotatably mounted on each of the two screw rods (7); the two nuts are fixedly connected to corresponding sliding frames (13); and the two screw rods (7) penetrate the corresponding sliding frames (13).

4. The device for bailing sand and coal powder in a coalbed methane horizontal well according to claim 2, characterized in that: The grab assembly (4) comprises a frame (37), a plurality of shafts are rotatably mounted on the frame (37), a clamping claw (38) is fixedly mounted on each of the shafts, a plurality of electric push rods (39) are rotatably mounted on the frame (37), the telescopic end of each electric push rod (39) is rotatably connected to the corresponding clamping claw (38), a crushing ball (40) is rotatably mounted on the frame (37), and a driving mechanism is installed between each of the shafts and the crushing ball (40).

5. The device for bailing sand and coal powder in a coalbed methane horizontal well according to claim 4, characterized in that: The driving mechanism comprises shafts rotatably mounted on a frame body (37), each shaft having a second toothed disc (43) fixedly mounted thereon, a toothed ring (42) meshing with the second toothed disc (43) fixedly mounted on the crushing ball (40), and the shafts are connected to the shaft body via a first bevel gear set (41).

6. The device for bailing sand and coal powder in a coalbed methane horizontal well according to claim 2, characterized in that: The scooping assembly comprises a sand storage pipe (2) fixedly mounted on a frame (6), the sand storage pipe (2) being fixedly connected to a sand scooping pump pipe (3) matched with the grabbing assembly (4), and a sand scooping pump being fixedly mounted in the sand scooping pump pipe (3).

7. The device for bailing sand and coal powder in a coalbed methane horizontal well according to claim 4, characterized in that: The swing assembly (5) comprises a fixing plate (18) fixedly mounted on the frame (6), a motor 1 (14) being fixedly mounted on the fixing plate (18), and a support plate (17) being fixedly mounted on the driving end of the motor 1 (14); A limit slide bar (20) is rotatably mounted on the support plate (17), and an arc-shaped limit rail (19) is fixedly mounted on the fixed plate (18). The limit slide bar (20) slides in the arc-shaped limit rail (19) to support the support plate (17).

8. The device for bailing sand and coal powder in a coalbed methane horizontal well according to claim 7, characterized in that: The adjustment assembly (16) comprises a second motor (21) fixedly mounted on a support plate (17), a gear cylinder (22) being rotatably mounted on the support plate (17), and the second motor (21) being fixedly mounted on the support plate (17), a driving end of the second motor (21) being fixedly connected to the gear cylinder (22), a screw rod (23) being fixedly mounted on the support plate (17), a threaded sleeve (25) being threadably rotatably mounted on the screw rod (23), a first toothed disc (24) meshing with the gear cylinder (22) being fixedly mounted on the threaded sleeve (25), a fixing plate being rotatably mounted on the threaded sleeve (25), and a mounting frame (26) being fixedly mounted on the fixing plate.

9. The device for bailing sand and coal powder in a coalbed methane horizontal well according to claim 8, characterized in that: The impact assembly (15) comprises a third disc (36) fixedly mounted on a frame (37); a first disc (28) is fixedly mounted on the mounting frame (26) via a plurality of first connecting rods (31); a third motor (27) is fixedly mounted on the mounting frame (26); an elastic telescopic rod (33) is fixedly mounted on the first disc (28); a second disc (29) is fixedly mounted on the telescopic end of the elastic telescopic rod (33); a conical spring (35) is fixedly mounted on the second disc (29); and the conical spring (35) is fixedly mounted on the second disc (29). 5) is fixedly connected to the third disc (36), a plurality of second connecting rods (32) are fixedly mounted on the second disc (29), each of the second connecting rods (32) passes through the first disc (28) and is slidably connected to the first disc (28), a protruding disc (30) is fixedly mounted on one end of the plurality of second connecting rods (32) away from the second disc (29), an eccentric frame is fixedly mounted on the driving end of the motor three (27), and a pressure wheel (34) cooperating with the protruding disc (30) is rotatably mounted on the eccentric frame.

10. A process for bailing sand and coal powder in a coalbed methane horizontal well, used for the device for bailing sand and coal powder in a coalbed methane horizontal well as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, the device is placed in a horizontal well. Then, the size of the crawling and traction assembly (1) is adjusted so that the crawling and traction assembly (1) can move freely in the horizontal well and stop at any position in the horizontal well. The external oil pipe is connected to the catching assembly. As the crawling and traction assembly (1) operates, the oil pipe is lowered into the horizontal well. S2. With the operation of the crawling and traction component (1), the grabbing component (4) moves toward the bottom of the horizontal well until the grabbing component (4) reaches the position of the sand and coal accumulation in the horizontal well. At this time, the position of the grabbing component (4) is adjusted by the adjustment component (16) so that the grabbing component (4) is offset against the sand and coal accumulation in the horizontal well. Then, the grabbing component (4) is started to grab and crush the sand and coal accumulation in the horizontal well. S3. During the crushing process, the direction of the grabbing assembly (4) is changed by the swing assembly (5), so that the grabbing assembly (4) performs an arc-shaped swinging motion along the inner wall of the horizontal well, thereby grabbing and crushing the accumulated sand and coal in the horizontal well at different positions on the inner wall of the horizontal well; S4. In addition, during the operation of the grabbing assembly (4), the impact assembly (15) drives the grabbing assembly (4) to move back and forth in the horizontal well, so that the grabbing assembly (4) impacts the sand and coal accumulation in the horizontal well, so that the block-shaped sand and coal accumulation are broken more quickly; S5. With the operation of the grabbing assembly (4), the accumulated sand and coal in the horizontal well are broken up. At this time, the crushed accumulated sand and coal are extracted and sucked out by the bailing assembly, thereby completing the sand and coal dust bailing operation.

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