Coal-bed gas well drainage and mining device

Abstract

The utility model relates to the technical field of natural gas collection, in particular to a coal-bed gas well drainage and mining device which comprises a water pumping pipe, a filter screen, a dredging assembly, a filter cylinder and a water separator, the filter screen and the dredging assembly are arranged at the end, located in an outer sleeve, of the water pumping pipe, and the filter cylinder is arranged at the end, located on the ground, of the water pumping pipe. Comprising a dredging barrel connected with a water pumping pipe, a displacement component arranged in the dredging barrel, and a clearing component arranged on the displacement component. The pulverized coal leaked by the screen mesh can be collected by the screen drum, the screen drum is located on the ground and is convenient to overhaul and replace, the collected pulverized coal can be utilized, and waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas collection, in particular to a coalbed methane well drainage and production device. Background Art

[0002] A gas well drainage device refers to an equipment system used to extract natural gas (such as coalbed methane, shale gas, etc.) from underground gas reservoirs. Among them, drainage gas production technology is one of the most commonly used technologies. Drainage gas production mainly relies on promoting the release and production of coalbed methane by lowering the water level or water pressure inside the coal seam.

[0003] A pipe string for coalbed methane well production provided by publication number CN220621827U includes an inner pipe string, an outer sleeve fixedly provided on the periphery of the inner pipe string, a surface casing fixedly provided on the bottom of the outer sleeve, a connecting tube fixedly provided on the inside of the surface casing, a gas extraction pipe string fixedly provided on the bottom of the connecting tube, and a screen tube provided at the bottom of the inner pipe string.

[0004] However, when the above-mentioned coalbed methane well production pipe string is in use, although the screen tube is set to prevent some coal powder from passing through the screen tube and entering the inner pipe string, after a period of use, a large amount of coal powder in the coal seam will easily block the screen tube, reducing production efficiency. In addition, some coal powder will still pass through the filter tube and be sucked into the inner pipe string, resulting in poor filtering effect. Utility Model Content

[0005] The purpose of the utility model is to provide a coalbed methane well drainage device to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A coalbed methane well drainage device, comprising:

[0008] An outer casing, wherein the outer casing is arranged in the ground;

[0009] A water pumping pipe, the water pumping pipe is arranged in the outer casing and extends out of the ground, a packer is arranged between the water pumping pipe and the outer casing, and a filter screen and a dredging component are arranged at one end of the water pumping pipe located in the outer casing;

[0010] A filter cartridge, the filter cartridge being arranged at one end of the water pumping pipe located on the ground;

[0011] a water pump, the water pump being in communication with the filter cartridge;

[0012] An air-water separator is connected to the water pump, and the water pump is used to extract the water-gas mixture through the water pump pipe, so that the filter screen and the filter cartridge filter the water-gas mixture twice and then send it to the air-water separator to separate the air and water, so that the coal powder that passes through the filter screen is collected in the filter cartridge;

[0013] The dredging assembly includes a dredging cylinder connected to the water suction pipe, a displacement member arranged in the dredging cylinder, and a cleaning member arranged on the displacement member. The displacement member is used to drive the cleaning member to extend into the water suction pipe to remove dirt on the filter screen.

[0014] Preferably, the displacement component includes a displacement cylinder arranged in the dredging cylinder, a dredging cavity and a displacement cavity arranged in the displacement cylinder, a displacement telescopic rod arranged in the displacement cavity and connected to the dredging cylinder, a sealing ring arranged on the outer wall of the displacement cylinder, and a sealing ring arranged on the sealing ring and fitted with the inner wall of the dredging cylinder.

[0015] Preferably, the displacement telescopic rod is used to drive the displacement cylinder to move along the dredging cylinder, and the sealing ring is used to prevent water from entering the displacement cavity.

[0016] Preferably, the cleaning component includes a dredging motor arranged in the dredging cavity, an external magnetic rotor arranged on the dredging motor, a spacer arranged in the dredging cylinder, an internal magnetic rotor inserted in the spacer, a roller arranged on the internal magnetic rotor, a fixed rail arranged on the roller, a sliding rod inserted in the fixed rail, and bristles arranged on the sliding rod.

[0017] Preferably, when the displacement telescopic rod drives the bristles to extend into the water suction pipe, the dredging motor drives the brush to rotate to dredge the filter.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model includes a water suction pipe, a filter screen, a dredging component, a filter cartridge, and a water separator. The filter screen and the dredging component are arranged at one end of the water suction pipe located in the outer sleeve, and the filter cartridge is arranged at one end of the water suction pipe located on the ground. The utility model includes a dredging cartridge connected to the water suction pipe, a displacement component arranged in the dredging cartridge, and a cleaning component arranged on the displacement component. The utility model arranges the displacement component and the cleaning component and starts them at a timed manner, so that the displacement component drives the cleaning component to dredge the screen. Through the arrangement of the screen and the screen cartridge, the coal powder leaked by the screen can be collected by the screen cartridge. The screen cartridge is located on the ground, which is convenient for maintenance and replacement. The collected coal powder can be utilized to reduce waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view structural diagram of the utility model;

[0021] Figure 2 It is a structural diagram of the utility model;

[0022] Figure 3 This is a positional relationship diagram of the outer sleeve and the water pumping pipe of the present utility model;

[0023] Figure 4 This is a positional relationship diagram of the dredging cylinder and the displacement cylinder of the present utility model;

[0024] Figure 5 This is a schematic structural diagram of the roller of the present utility model;

[0025] Figure 6 It is a schematic cross-sectional structural diagram of the displacement cylinder of the present utility model.

[0026] In the figure: 1. Outer casing; 2. Suction pipe; 3. Packer; 4. Filter screen; 5. Filter cartridge; 6. Water pump; 7. Air-water separator; 8. Dredging cylinder; 9. Displacement cylinder; 10. Dredging chamber; 11. Displacement chamber; 12. Displacement telescopic rod; 13. Sealing ring; 14. Sealing ring; 15. Dredging motor; 16. Outer magnetic rotor; 17. Spacer; 18. Inner magnetic rotor; 19. Drum; 20. Fixed rail; 21. Sliding rod; 22. Brush; 100. Ground. DETAILED DESCRIPTION

[0027] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1 to 6 , the utility model provides a technical solution:

[0029] A coalbed methane well drainage device, comprising:

[0030] The outer casing 1 is arranged in the ground 100 so as to be inserted into the gas layer of the coal seam.

[0031] The water pipe 2 is arranged in the outer sleeve pipe 1 and extends out of the ground 100, so that one end of the water pipe 2 is located in the outer sleeve pipe 1 and the other end is located on the ground 100. A packer 3 is arranged between the water pipe 2 and the outer sleeve pipe 1. After the water pipe 2 is inserted into the outer sleeve pipe 1 and the packer 3 is expanded, the water pipe 2 is anchored in the outer sleeve pipe 1. The end of the water pipe 2 located in the outer sleeve pipe 1 is provided with a filter screen 4 which is fixedly connected to the opening of the side wall of the water pipe 2 by welding or the like. When the water pipe 2 extracts the gas-water mixture, the filter screen 4 performs preliminary filtration.

[0032] The filter cartridge 5 is arranged at the end of the water pipe 2 located on the ground 100. The filter cartridge 5 is fixedly connected to the water pipe 2 by arranging a flange or the like. The filter cartridge 5 is provided with a second filter screen having finer filter holes than the filter screen 4, so that the filter cartridge 5 further filters the gas-water mixture. The water pump 6 is in communication with the filter cartridge 5. The water pump 6 is fixedly connected to the filter cartridge 5 by arranging a flange or the like. After the water pump 6 is started, the water pump 6 extracts water through the water pipe 2.

[0033] The gas-water separator 7 is in communication with the water pump 6. The water inlet end of the gas-water separator 7 is fixedly connected to the water outlet end of the water pump 6 by arranging a flange. After the gas-water separator 7 receives the gas-water mixture pumped by the water pump 6 through the water inlet end, the gas-water separator 7 separates the natural gas and water. The natural gas is discharged from the gas outlet pipe of the gas-water separator 7, and the water is discharged from the water outlet pipe of the gas-water separator 7, so that gas-water separation is achieved.

[0034] The dredging assembly includes a dredging cartridge 8 connected to the water pipe 2, a displacement member arranged in the dredging cartridge 8, and a cleaning member arranged on the displacement member. The displacement member is used to drive the cleaning member to extend into the water pipe 2 to remove the dirt on the filter screen 4. The displacement member includes a displacement cartridge 9, a dredging cavity 10, a displacement cavity 11, a displacement telescopic rod 12, a sealing ring 13, and a sealing ring 14. The cleaning member includes a dredging motor 15, an outer magnetic rotor 16, a spacer 17, an inner magnetic rotor 18, a roller 19, a fixed rail 20, a sliding rod 21, and brush hairs 22.

[0035] The displacement cylinder 9 is arranged in the dredging cylinder 8, and the displacement cylinder 9 is connected to the dredging cylinder 8 for movement. The dredging cavity 10 and the displacement cavity 11 are arranged in the displacement cylinder 9. The dredging cavity 10 and the displacement cavity 11 are symmetrically arranged in the displacement cylinder 9. The dredging cavity 10 is close to the water pump 2, and the displacement cavity 11 is close to the bottom wall of the dredging cylinder 8. The displacement telescopic rod 12 is arranged in the displacement cavity 11 and is connected to the dredging cylinder 8. The displacement telescopic rod 12 is fixedly connected to the inner wall of the displacement cavity 11 by setting bolts, etc. The telescopic end of the displacement telescopic rod 12 extends through the side wall of the displacement cavity 11 and is connected to the inner wall of the dredging cylinder 8. On the wall, the retractable end of the displacement telescopic rod 12 is fixedly connected to the inner wall of the dredging tube 8 by setting screws, and the sealing ring 13 is set on the outer wall of the displacement tube 9. The sealing ring 13 is fixedly connected to the outer wall of the displacement tube 9 by welding or one-piece molding. The sealing ring 14 is set on the sealing ring 13 and fits the inner wall of the dredging tube 8. The sealing ring 14 is fixedly connected to the sealing ring 13 by gluing or other means. The sealing ring 14 is tightly attached to the inner wall of the dredging tube 8 and is movably connected, so that the displacement telescopic rod 12 drives the displacement tube 9 to move along the dredging tube 8 and prevents water from seeping into the displacement cavity 11.

[0036] The dredging motor 15 is arranged in the dredging chamber 10, and the dredging motor 15 is fixedly connected to the inner wall of the dredging chamber 10 by means of bolts, etc., the outer magnetic rotor 16 is arranged on the dredging motor 15, and the outer magnetic rotor 16 is fixedly connected to the dredging motor 15 by means of bolts, etc., the spacer 17 is arranged on the dredging cylinder 8 and extends into the outer magnetic rotor 16, the spacer 17 is fixedly connected to the dredging cylinder 8 by means of bolts and sealing rings 14, etc., the inner magnetic rotor 18 is inserted in the spacer 17, and the inner magnetic rotor 18 is rotatably connected to the spacer 17 by means of bearings, etc., the roller 19 is arranged on the inner magnetic rotor 18, and the roller 19 is fixedly connected to the inner magnetic rotor 18 by means of bolts, etc., the fixed rail 20 is arranged on the roller 19, and the fixed rail 20 is fixedly connected to the roller 19 by welding or integral molding, and the slide rod 21 is inserted into the fixed rail 20. After being inserted into the fixed rail 20, the slide rod 21 can be fixedly connected to the fixed rail 20 by setting bolts, etc., and bristles 22 are provided on the slide rod 21. The bristles 22 are fixedly connected to the fixed rail 20 by gluing, etc. Through the setting of the slide rod 21, the bristles 22 can be quickly replaced. When the displacement telescopic rod 12 drives the brush to extend into the water suction pipe 2, the dredging motor 15 drives the bristles 22 to rotate to dredge the filter 4. A single-chip microcomputer 80c51 is also provided in the displacement cylinder 9, so that the displacement telescopic rod 12 and the dredging motor 15 are connected through data electrical signal communication, which is used to control the timing machine start of the displacement telescopic rod 12 and the dredging motor 15.

[0037] Working principle: in use, start the water pump 6, make through the water pipe 2 and take out the water gas mixture, make the filter screen 4 and filter drum 5 carry out two filtrations to the water gas mixture and send into the gas-water separator 7 and separate gas-water, every time interval, the specific time can be reasonably selected according to actual situation, start the displacement telescopic rod 12 and drive the displacement cylinder 9 along the dredging cylinder 8, make the bristle 22 align the filter screen 4, start the dredging motor 15 and drive the bristle 22 to rotate, make the bristle 22 rotate and dredge the filter screen 4, avoid that the filter screen 4 is blocked by the coal powder.

[0038] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coalbed methane well drainage device, characterized in that: include: An outer casing, wherein the outer casing is arranged in the ground; A water pumping pipe, the water pumping pipe is arranged in the outer casing and extends out of the ground, a packer is arranged between the water pumping pipe and the outer casing, and a filter screen and a dredging component are arranged at one end of the water pumping pipe located in the outer casing; A filter cartridge, the filter cartridge being arranged at one end of the water pumping pipe located on the ground; a water pump, the water pump being in communication with the filter cartridge; An air-water separator is connected to the water pump, and the water pump is used to extract the water-gas mixture through the water pump pipe, so that the filter screen and the filter cartridge filter the water-gas mixture twice and then send it to the air-water separator to separate the air and water, so that the coal powder that passes through the filter screen is collected in the filter cartridge; The dredging assembly includes a dredging cylinder connected to the water suction pipe, a displacement member arranged in the dredging cylinder, and a cleaning member arranged on the displacement member. The displacement member is used to drive the cleaning member to extend into the water suction pipe to remove dirt on the filter screen.

2. A coalbed methane well drainage device according to claim 1, characterized in that: The displacement component includes a displacement cylinder arranged in the dredging cylinder, a dredging cavity and a displacement cavity arranged in the displacement cylinder, a displacement telescopic rod arranged in the displacement cavity and connected to the dredging cylinder, a sealing ring arranged on the outer wall of the displacement cylinder, and a sealing ring arranged on the sealing ring and in contact with the inner wall of the dredging cylinder.

3. A coalbed methane well drainage device according to claim 2, characterized in that: The displacement telescopic rod is used to drive the displacement cylinder to move along the dredging cylinder, and the sealing ring is used to prevent water from entering the displacement cavity.

4. A coalbed methane well drainage device according to claim 3, characterized in that: The cleaning component includes a dredging motor arranged in the dredging cavity, an external magnetic rotor arranged on the dredging motor, a spacer arranged in the dredging cylinder, an internal magnetic rotor inserted in the spacer, a roller arranged on the internal magnetic rotor, a fixed rail arranged on the roller, a sliding rod inserted in the fixed rail, and bristles arranged on the sliding rod.

5. A coalbed methane well drainage device according to claim 4, characterized in that: When the displacement telescopic rod drives the bristles to extend into the water suction pipe, the dredging motor drives the bristles to rotate to dredge the filter.

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