Drainage and pressure reduction device of coal bed gas exploration well

Abstract

The utility model belongs to the technical field of coalbed methane exploitation equipment, and particularly relates to a drainage depressurization device of a coalbed methane exploration well, which comprises a base, a shell arranged in the middle of the upper surface of the base, a water pump arranged in the shell, a water inlet pipe arranged at one end of the water pump, a water outlet pipe arranged at the other end of the water pump, and a corrugated pipe arranged in the middle of the water outlet pipe. A mounting mechanism is arranged in one side of the base, a lifting mechanism is arranged on one side of the upper surface of the base, and a filtering mechanism is arranged at the bottom end of the water inlet pipe; the filtering mechanism comprises a filter cartridge, a fixing rod, a rotating shaft, turbine blades and a scraper blade, the fixing rod is fixedly mounted in the filter cartridge, the turbine blades and the scraper blade are fixedly mounted on the outer surface of the rotating shaft, and the filtering mechanism is used for draining and filtering. The positions of the base, the water pump and the water inlet pipe can be adjusted through the lifting mechanism, so that the water inlet pipe is located below the water surface all the time, and the drainage efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of coalbed methane extraction equipment, and specifically relates to a drainage and pressure reduction device for a coalbed methane exploration well. Background Technique

[0002] Coalbed methane is usually natural gas generated during the coal formation process by coal, mainly composed of methane produced by the decomposition of organic matter. In coal seams, methane is usually adsorbed on the pore surface of coal and dissolved in the water in the coal seam at the same time, forming gaseous and aqueous methane. The key factors for coalbed methane storage include:

[0003] Permeability and porosity of the coal seam: High permeability and good porosity are the basis for coalbed methane extraction.

[0004] Gas-water ratio: That is, the ratio of methane to water in the coal seam. The higher the gas-water ratio, the lower the extraction difficulty.

[0005] Burial depth and pressure: The greater the depth of the coal seam, the higher the pressure, and the greater the solubility of methane gas. These factors need to be considered in extraction;

[0006] Coalbed methane and natural gas do not pollute the environment and are defined as clean energy. However, the biggest problem hindering the full extraction of natural gas is the water production in gas wells, which often leads to gas well flooding. The water in the wellbore blocks the flow of natural gas in the formation into the well, so that natural gas cannot be extracted to the ground. Therefore, a device for drainage and pressure reduction is needed now.

[0007] The prior art has the following problems: In the "Drainage and Pressure Reduction Device for a Coalbed Methane Exploration Well" with the publication number of CN216277828U in the prior art, "it includes a device main body, an electric pump main body is fixedly installed at the top of the device main body, an input pipe of the electric pump main body is connected with a water suction pipe, a sound insulation sleeve is sleeved outside the water suction pipe, a crushing cylinder is connected to the liquid inlet end of the sound insulation sleeve, an output pipe of the electric pump main body is connected with a drain pipe, a control box is fixedly installed above the device main body, and the input end of the electric pump main body is electrically connected with the output end of the control box, and a cylinder cover is connected to the top of the crushing cylinder";

[0008] In the above device, the coal slime during the drainage process is mashed by the crushing cylinder, and the servo motor used by the crushing cylinder is located below the water surface following the crushing cylinder. Therefore, after long-term use, it is easy to damage the servo motor, so that the crushing cylinder cannot work and affects the drainage efficiency. At the same time, the drainage device in the above device needs to be stably installed on the ground, so that the position of the water suction pipe in the water is fixed. Therefore, when the water surface drops during the drainage process, the drainage cannot continue, thus affecting the use effect of the drainage and pressure reduction device. Content of the Utility Model

[0009] In view of the deficiencies of the prior art, the utility model provides a drainage and pressure reduction device for coalbed methane exploration wells, which solves the problems that the servo motor used for the crushing cylinder is easily damaged during the use of the existing drainage and pressure reduction device, affecting the drainage and filtration effect, and the position of the water extraction pipe is fixed. Therefore, when the water level drops during the drainage process and the water extraction pipe does not move, the drainage efficiency will be affected.

[0010] To achieve the above object, the utility model provides the following technical solutions: A drainage and pressure reduction device for coalbed methane exploration wells, including a base, in the middle of the upper surface of the base, there is a housing, inside the housing, there is a water pump, at one end of the water pump, there is a water inlet pipe, at the other end of the water pump, there is a water outlet pipe, and in the middle of the water outlet pipe, there is a corrugated pipe;

[0011] Inside one side of the base, there is an installation mechanism, on one side of the upper surface of the base, there is a lifting mechanism, and at the bottom end of the water inlet pipe, there is a filtering mechanism;

[0012] The filtering mechanism includes a filter cylinder, a fixed rod, a rotating shaft, turbine blades, and a scraper. Inside the filter cylinder, there is a fixed rod fixedly installed. On the outer surface of the rotating shaft, there are turbine blades and a scraper fixedly installed. The filtering mechanism is used for drainage and filtration.

[0013] As a preferred technical solution of the utility model, the installation mechanism includes a plug rod, an installation seat, and a suspension bracket. Above the plug rod, there is an installation seat fixedly installed, and the suspension bracket is fixedly installed on the upper surface of the installation seat.

[0014] As a preferred technical solution of the utility model, the lifting mechanism includes a mounting plate, a motor, a roller, a pulling rope, and a mounting frame. On one side of the mounting plate, there is a motor fixedly installed. The pulling rope is wound around the outer surface of the roller, and at the bottom end of the pulling rope, there is a mounting frame fixedly installed.

[0015] As a preferred technical solution of the utility model, the housing is fixedly installed on the upper surface of the base, both the water inlet pipe and the water outlet pipe are fixedly installed with the water pump, and the corrugated pipe is fixedly connected to the middle of the water outlet pipe.

[0016] As a preferred technical solution of the utility model, the water inlet pipe is fixedly connected to the filter cylinder, the fixed rod is movably connected to the rotating shaft, and the rotating shaft is movably connected to the bottom of the filter cylinder.

[0017] As a preferred technical solution of the utility model, there are four groups of plug rods. The plug rods are slidably connected to the four corners inside the base. The installation seat is fixedly connected between the suspension bracket and the plug rod, and a limit disk is fixedly installed on the lower surface of the plug rod.

[0018] As a preferred technical solution of the present utility model, the mounting plate is fixedly installed with the mounting mechanism, the motor is in transmission connection with the roller, and the mounting frame is fixedly installed on both sides of the upper surface of the base.

[0019] Compared with the prior art, the present utility model provides a drainage and pressure reduction device for a coalbed methane exploration well, having the following beneficial effects:

[0020] 1. For this drainage and pressure reduction device for a coalbed methane exploration well, a filter cylinder is fixedly installed at the bottom end of the water inlet pipe. Inside the filter cylinder, a rotating shaft is movably connected through a fixing rod. At the same time, turbine blades are fixedly installed on the surface of the rotating shaft. Therefore, when the water pump is started, the liquid can pass through the filter holes of the filter cylinder and enter the inside of the filter cylinder, and then move upward. When passing through the turbine blades, it will push the turbine blades to drive the rotating shaft to rotate. The rotation of the turbine blades can synchronously drive the rotating shaft to drive the scraper to rotate and clean the filter cylinder. Therefore, the filtering structure of this device does not require electric drive, thus avoiding equipment damage and affecting the drainage and filtration effect.

[0021] 2. For this drainage and pressure reduction device for a coalbed methane exploration well, a plug rod is sleeved on the base, and the pointed head at the bottom end of the plug rod can be inserted into the well. At the same time, through the cooperation of the mounting seat and the suspension frame, the installation and movement of the drainage and pressure reduction device are more convenient. At the same time, a lifting mechanism is installed between the mounting mechanism and the base. Under the action of the motor of the lifting mechanism, the roller can be driven to rotate, so that the pull rope can be wound and unwound, so that the base can drive the water pump and the water inlet pipe to move and adjust in the well, so that the bottom end of the water inlet pipe can be continuously below the water surface, thereby effectively improving the efficiency of drainage and pressure reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional view of the overall installation structure of a drainage and pressure reduction device for a coalbed methane exploration well of the present utility model;

[0023] Figure 2 is a schematic diagram of the installation structure of the lifting mechanism of a drainage and pressure reduction device for a coalbed methane exploration well of the present utility model;

[0024] Figure 3 is a schematic diagram of the structure of the filtering mechanism of a drainage and pressure reduction device for a coalbed methane exploration well of the present utility model;

[0025] Figure 4 is a schematic diagram of the surface structure of the rotating shaft of a drainage and pressure reduction device for a coalbed methane exploration well of the present utility model;

[0026] Figure 5 is a drainage and pressure reduction device for a coalbed methane exploration well of the present utility model Figure 1 Schematic diagram of the enlarged structure at A in

[0027] In the figure: 1, base; 2, mounting mechanism; 21, inserting rod; 22, mounting seat; 23, suspension bracket; 3, housing; 4, water pump; 5, water inlet pipe; 6, water outlet pipe; 7, corrugated pipe; 8, lifting mechanism; 81, mounting plate; 82, motor; 83, roller; 84, pulling rope; 85, mounting frame; 9, filtering mechanism; 91, filter cartridge; 92, fixing rod; 93, rotating shaft; 94, turbine blade; 95, scraper. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-5 , in this implementation scheme: A drainage and pressure reduction device for a coalbed methane exploration well includes a base 1. In the middle of the upper surface of the base 1, a housing 3 is provided. Inside the housing 3, a water pump 4 is provided. One end of the water pump 4 is provided with a water inlet pipe 5, and the other end of the water pump 4 is provided with a water outlet pipe 6. In the middle of the water outlet pipe 6, a corrugated pipe 7 is provided;

[0030] Inside one side of the base 1, a mounting mechanism 2 is provided. On one side of the upper surface of the base 1, a lifting mechanism 8 is provided. At the bottom end of the water inlet pipe 5, a filtering mechanism 9 is provided;

[0031] The filtering mechanism 9 includes a filter cartridge 91, a fixing rod 92, a rotating shaft 93, turbine blades 94 and a scraper 95. Inside the filter cartridge 91, a fixing rod 92 is fixedly installed. On the outer surface of the rotating shaft 93, turbine blades 94 and a scraper 95 are fixedly installed. The filtering mechanism 9 is used for drainage filtration.

[0032] Please refer to Figure 1 and Figure 2 , in this embodiment, the mounting mechanism 2 includes an inserting rod 21, a mounting seat 22 and a suspension bracket 23. Above the inserting rod 21, a mounting seat 22 is fixedly installed. The suspension bracket 23 is fixedly installed on the upper surface of the mounting seat 22.

[0033] In the above embodiment, through the inserting rod 21 of the mounting mechanism 2, the whole drainage and pressure reduction device can be installed inside the coalbed methane exploration well. Under the action of the suspension bracket 23, the drainage and pressure reduction device can be hoisted and moved as a whole, so as to facilitate the installation and disassembly of the drainage and pressure reduction device.

[0034] Specifically, there are four groups of insertion rods 21. The insertion rods 21 are slidably connected to the four corners inside the base 1. The mounting seat 22 is fixedly connected between the suspension frame 23 and the insertion rods 21. A limiting disk is fixedly installed on the lower surface of the insertion rods 21.

[0035] Through the sliding connection between the insertion rods 21 and the base 1, the base 1 can move vertically on the surface of the insertion rods 21. The mounting seat 22 can connect the suspension frame 23 and the insertion rods 21. At the same time, the limiting disk installed on the surface of the insertion rods 21 can limit the depth of the insertion rods 21 inserted into the well.

[0036] Please refer to Figure 1 and Figure 2 In this embodiment, the lifting mechanism 8 includes a mounting plate 81, a motor 82, a roller 83, a pulling rope 84, and a mounting frame 85. A motor 82 is fixedly installed on one side of the mounting plate 81. A pulling rope 84 is wound around the outside of the roller 83. The bottom end of the pulling rope 84 is fixedly installed with a mounting frame 85.

[0037] In the above embodiment, the motor 82 can be installed through the mounting plate 81, and the roller 83 can rotate. Therefore, the pulling rope 84 wound outside can be wound and unwound. At the same time, the mounting frame 85 installed at one end of the pulling rope 84 can drive the base 1 to move during the winding and unwinding of the pulling rope 84.

[0038] Furthermore, the mounting plate 81 is fixedly installed with the mounting mechanism 2. The motor 82 is in transmission connection with the roller 83. The mounting frame 85 is fixedly installed on both sides of the upper surface of the base 1. The motor 82 can make the roller 83 rotate between the mounting plates 81.

[0039] Please refer to Figure 1 、 Figure 3 and Figure 4 In this embodiment, the water inlet pipe 5 is fixedly connected to the filter cartridge 91. The fixing rod 92 is movably connected to the rotating shaft 93. The rotating shaft 93 is movably connected to the bottom of the filter cartridge 91.

[0040] In the above embodiment, the rotating shaft 93 is movably installed inside the filter cartridge 91 through the fixing rod 92. The turbine blades 94 on the surface of the rotating shaft 93 can drive the rotating shaft 93 to rotate under the action of water flow. Then, the scraper 95 rotates circumferentially to clean the filter cartridge 91 to prevent blockage.

[0041] Please refer to Figure 1 and Figure 5 It is additionally explained that the housing 3 is fixedly installed on the upper surface of the base 1. Both the water inlet pipe 5 and the water outlet pipe 6 are fixedly installed with the water pump 4. The corrugated pipe 7 is fixedly connected to the middle of the water outlet pipe 6.

[0042] Under the action of the water pump 4, the liquid can be sent into the water outlet pipe 6 through the water inlet pipe 5, thereby achieving the drainage effect. At the same time, under the action of the corrugated pipe 7, there is no restriction when the base 1 drives the water pump 4 to move and adjust.

[0043] The working principle and usage process of the present utility model: After the operator hoists the device into the well by using the suspension frame 23, the device is fixed by inserting the insertion rod 21 of the installation mechanism 2 into the coal slime in the well. By starting the motor 82 to drive the roller 83 to rotate, the pulling rope 84 is loosened and released. Then, when the base 1 drives the water pump 4, the water inlet pipe 5, and the filtering mechanism 9 to enter to an appropriate height below the water surface, by starting the water pump 4, the liquid can flow into the filter cylinder 91. After the liquid is filtered by the filter holes of the filter cylinder 91, it will enter the filter cylinder 91 and move upward into the water inlet pipe 5. When the liquid passes through the turbine blades 94, it can push the turbine blades 94 to rotate, so that the rotating shaft 93 drives the scraper 95 to rotate. The scraper 95 cleans the filter cylinder 91 to prevent the filter cylinder 91 from being blocked. After draining water for a period of time, the liquid level will drop. At this time, by starting the motor 82 to drive the roller 83 to continue to unwind the pulling rope 84, it is ensured that the water inlet pipe 5 is always below the liquid level, thereby ensuring the drainage efficiency. After the drainage is completed, by winding up the roller 83, the base 1 is lifted to an appropriate position, and then the drainage and pressure reduction device can be hoisted out of the well by the suspension frame 23 to complete the drainage work.

[0044] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A drainage and pressure reduction device for a coalbed methane exploration well, comprising a base (1). In the middle of the upper surface of the base (1), a housing (3) is provided. Inside the housing (3), a water pump (4) is provided. One end of the water pump (4) is provided with a water inlet pipe (5), and the other end of the water pump (4) is provided with a water outlet pipe (6). In the middle of the water outlet pipe (6), a corrugated pipe (7) is provided. It is characterized in that: An installation mechanism (2) is provided inside one side of the base (1), a lifting mechanism (8) is provided on one side of the upper surface of the base (1), and a filtering mechanism (9) is provided at the bottom end of the water inlet pipe (5); The filtering mechanism (9) includes a filter cylinder (91), a fixing rod (92), a rotating shaft (93), turbine blades (94) and a scraping plate (95). The fixing rod (92) is fixedly installed inside the filter cylinder (91). On the outer surface of the rotating shaft (93), the turbine blades (94) and the scraping plate (95) are fixedly installed. The filtering mechanism (9) is used for drainage filtration.

2. The drainage pressure reduction device for a coalbed methane exploration well according to claim 1, wherein: The installation mechanism (2) includes a plug rod (21), an installation seat (22) and a suspension frame (23). Above the plug rod (21), the installation seat (22) is fixedly installed. The suspension frame (23) is fixedly installed on the upper surface of the installation seat (22).

3. The drainage and pressure reduction device for a coalbed methane exploration well according to claim 1, wherein: The lifting mechanism (8) includes a mounting plate (81), a motor (82), a roller (83), a pulling rope (84) and a mounting frame (85). On one side of the mounting plate (81), the motor (82) is fixedly installed. The pulling rope (84) is wound around the outer part of the roller (83). At the bottom end of the pulling rope (84), the mounting frame (85) is fixedly installed.

4. The drainage and pressure reduction device for a coalbed methane exploration well according to claim 1, wherein: The housing (3) is fixedly installed on the upper surface of the base (1). Both the water inlet pipe (5) and the water outlet pipe (6) are fixedly installed with the water pump (4). The corrugated pipe (7) is fixedly connected to the middle of the water outlet pipe (6).

5. The drainage and pressure reduction device for a coalbed methane exploration well according to claim 1, characterized in that: The water inlet pipe (5) is fixedly connected to the filter cylinder (91). The fixing rod (92) is movably connected to the rotating shaft (93). The rotating shaft (93) is movably connected to the bottom of the filter cylinder (91).

6. The drainage and pressure reduction device for a coalbed methane exploration well according to claim 2, wherein: Four groups of plug rods (21) are provided. The plug rods (21) are slidably connected to the four corners inside the base (1). The installation seat (22) is fixedly connected between the suspension frame (23) and the plug rod (21). On the lower surface of the plug rod (21), a limiting disk is fixedly installed.

7. The drainage and pressure reduction device for a coalbed methane exploration well according to claim 3, wherein: The mounting plate (81) is fixedly installed with the installation mechanism (2). The motor (82) is in transmission connection with the roller (83). The mounting frame (85) is fixedly installed on both sides of the upper surface of the base (1).

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