CN109025912B - Coal bed gas drainage and gas production device - Google Patents
Coal bed gas drainage and gas production device Download PDFInfo
- Publication number
- CN109025912B CN109025912B CN201811068119.7A CN201811068119A CN109025912B CN 109025912 B CN109025912 B CN 109025912B CN 201811068119 A CN201811068119 A CN 201811068119A CN 109025912 B CN109025912 B CN 109025912B
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- water storage
- storage cylinder
- drainage
- water
- coal bed
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
Abstract
The invention discloses a coal bed gas drainage and gas production device, which can greatly improve the efficiency of water pumping and ensure the reliable operation of a water pump, when the water pumping is carried out in a mode, the water level is too low to cause the damage of the water pump, meanwhile, the water in an extraction hole can be completely pumped, the state that the extraction hole is in a water-free state or a lower water level state is always ensured, and the effect and the efficiency of air pumping are ensured.
Description
Technical Field
The invention relates to a coal bed gas drainage and gas production device, and belongs to the technical field of coal bed gas drainage and water production equipment.
Background
Under the condition that the international energy situation is in a tight trend, the coal bed gas is used as a high-quality high-efficiency clean energy, and the large-scale development and utilization prospect of the coal bed gas is attractive. The development and utilization of the coal bed gas also have the effect of achieving multiple purposes, namely, the prevention level of gas accidents is improved, and the safety effect is achieved; the greenhouse gas is effectively reduced, and a good environment-friendly effect is generated; as a high-efficiency and clean energy source, the method produces great economic benefit. If the coal bed gas is utilized, the coal bed gas is used as power generation fuel, industrial fuel and resident life fuel; the fuel can be liquefied into automobile fuel, can be widely used for producing synthetic ammonia, formaldehyde, methanol, carbon black and the like, becomes a clean energy source with high heat value and an important raw material, and has very wide market prospect for development and utilization.
For the exploitation of coal bed gas, because the water seepage phenomenon often appears in the exploitation process, the water seepage in the exploitation hole needs to be continuously extracted and discharged, therefore, the water drainage is particularly important for the exploitation of the coal bed gas, the existing coal bed gas drainage is generally realized only by a drainage pump, in the drainage process, a lower water level in the hole needs to be maintained, the drainage pump needs to be started constantly, the drainage pump is easy to damage when running under the state of lower water level, in addition, the power of the drainage pump is higher, the electric energy is wasted when being started constantly, and the situation that the water level is lower constantly cannot be ensured.
Aiming at the problems, the invention provides the coal bed gas drainage and gas production device, which improves the drainage thoroughness and saves the energy consumption.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the coal bed gas drainage and gas production device comprises an air extraction component and a drainage component, wherein a sealing plugging piece is arranged at the upper end of an extraction hole to be extracted, an air extraction pipe of the air extraction component extends into the middle position of the extraction hole through the sealing plugging piece, the drainage component comprises a drainage pump, a rotary driving component, a rotary column, a primary water storage cylinder, a secondary water storage cylinder and a spiral water delivery blade, the rotary column rotatably extends into the extraction hole from the rotary driving component, the lower end of the rotary column is coaxially and fixedly connected with the primary water storage cylinder, the lower end of the primary water storage cylinder is coaxially and fixedly connected with the secondary water storage cylinder, a middle suction pump is arranged at the bottom in the secondary water storage cylinder, the output water pipe end of the middle suction pump is connected into the primary water storage cylinder, and the drainage pump is connected to the bottom position in the primary water storage cylinder through a drainage pipe, the circular part of the second-stage water storage cylinder is provided with spiral water conveying blades matched with the diameter of the extraction hole, a plurality of water inlet holes communicated with the water storage cavity of the second-stage water storage cylinder are densely formed in the outer wall of the upper portion of the second-stage water storage cylinder, the lower portion of the second-stage water storage cylinder is of a non-porous structure enclosed into the water storage cavity, the middle water suction pump is located in the non-porous structure of the water storage cavity of the lower portion of the second-stage water storage cylinder, the rotary driving component drives the rotary column to rotate during air suction and drainage operation, the spiral water conveying blades are driven to convey water at the bottom of the extraction hole downwards to the water inlet hole on the outer wall of the upper portion of the second-stage water storage cylinder, the water flows downwards into the non-porous structure of the water storage cavity, then the middle water suction.
Further, preferably, a central through hole is formed in the center of the rotary column, a drain pipe connected to the drain pump is communicated into the primary water storage barrel through the central through hole, and a control valve is arranged on the drain pipe.
Further, as preferred, the rotary driving subassembly includes mount, backup pad, rotation driving motor, driving gear and driven gear, wherein, be provided with the cavity in the mount, the fixed backup pad that is provided with in upper end of mount, the outer circumference of upper portion of column spinner adopts the rotatable support of outer bearing to install on the mount, and stretch into in the cavity of mount, stretch into the fixed cover in upper end of the column spinner in the mount cavity is equipped with driven gear, driven gear with the transmission of driving gear meshing, the driving gear with the rotation driving motor drive is connected.
Preferably, a protective positioning sleeve is fixedly arranged in the central through hole of the rotary column by adopting a bearing, the upper end of the protective positioning sleeve is fixedly arranged on the supporting plate, the drain pipe is positioned in the protective positioning sleeve, and the drainage pump is arranged on the supporting plate.
Further, preferably, the air extraction assembly comprises an air extraction pump, an air extraction pipe and an air extraction control valve, the air extraction pump is connected to the air extraction pipe, the air extraction pipe penetrates through the sealing plugging piece and extends into the air extraction hole, and the air extraction control valve is located on the air extraction pipe.
Further, preferably, the bottom of the secondary water storage cylinder is arranged in a bearing seat, and the bearing seat is fixed at the bottom of the extraction hole in a binder mode.
Further, preferably, the diameter of the outer circumference of the primary water storage cylinder is the same as that of the outer circumference of the rotary column, and the diameter of the outer circumference of the secondary water storage cylinder is smaller than that of the outer circumference of the rotary column.
Further, it is preferable that the spiral water delivery blade is shaped such that water can be delivered downward when it rotates, and the spiral water delivery blade is an elastic structure made of an elastic material.
Further, as preferred, all be provided with the level sensor who detects its interior liquid level in one-level water storage section of thick bamboo and the second grade water storage section of thick bamboo.
Further, as a preference, the device also comprises a controller, and the controller is connected with the air suction pump, the drainage pump and the rotary driving assembly.
Compared with the prior art, the invention has the beneficial effects that:
the coal bed gas drainage gas production device can greatly improve the efficiency of water pumping, ensure the reliable operation of the water pump, and ensure the damage risk of the water pump caused by too low water level when pumping water, and simultaneously can completely pump the water in the extraction hole, so that the extraction hole is always in a state of no water or low water level, and the effect and efficiency of air pumping are ensured.
Drawings
FIG. 1 is a schematic structural diagram of a drainage and gas production device for coal bed methane according to the present invention;
FIG. 2 is a schematic structural view of a rotary driving assembly of the coal bed methane drainage and gas production device of the present invention;
FIG. 3 is a schematic structural diagram of a secondary water storage tank of the coal bed methane drainage and gas production device according to the present invention;
FIG. 4 is a schematic structural diagram of the positions of the primary water storage tank and the secondary water storage tank of the coal bed methane drainage and gas production device of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the coal bed gas drainage and gas production device comprises an air extraction component and a water drainage component, wherein a sealing plugging piece 14 is arranged at the upper end of an extraction hole to be extracted, an air extraction pipe 13 of the air extraction component extends into the middle position of the extraction hole through the sealing plugging piece 14, the water drainage component comprises a drainage pump 7, a rotary driving component, a rotary column 8, a primary water storage cylinder 17, a secondary water storage cylinder 22 and a spiral water delivery blade 11, wherein the rotary column 8 can rotatably extend into the extraction hole through the rotary driving component, the primary water storage cylinder is coaxially and fixedly connected with the lower end of the rotary column 8, the secondary water storage cylinder 17 is coaxially and fixedly connected with the lower end of the primary water storage cylinder 17, a middle water suction pump 12 is arranged at the bottom in the secondary water storage cylinder 17, and the 20 end of an output water pipe of the middle water suction pump 12 is connected into the primary water storage cylinder 17, the drainage pump 7 is connected to the bottom position in the first-stage water storage cylinder 17 through a drainage pipe 19, a spiral water conveying blade 11 matched with the diameter of the extraction hole is arranged at the circumferential part of the second-stage water storage cylinder 22, a plurality of water inlet holes 21 communicated with the water storage cavity of the second-stage water storage cylinder 22 are densely arranged on the outer wall of the upper part of the second-stage water storage cylinder, the lower part of the second-stage water storage cylinder 22 is of a non-porous structure enclosing the water storage cavity, the middle suction pump 12 is positioned in the non-porous structure of the water storage cavity at the lower part of the second-stage water storage cylinder 22, during air suction and drainage operation, the rotary driving component drives the rotary column to rotate, further drives the spiral water conveying blade 11 to convey water at the bottom of the extraction hole downwards to the water inlet hole on the outer wall of the upper part of the second-stage water storage cylinder and then downwards flow into the non-porous structure, the water is drained by the drain pump 7.
In this embodiment, the center of the spin column 8 is provided with a central through hole, a drain pipe 19 connected to the drain pump 7 is communicated to the primary water storage tank through the central through hole, and the drain pipe is provided with a control valve 18.
As a preferred embodiment, the rotary driving assembly includes a fixing frame 3, a supporting plate 16, a rotary driving motor 4, a driving gear 5 and a driven gear 6, wherein a cavity is provided in the fixing frame 3, the supporting plate 16 is fixedly provided at the upper end of the fixing frame 3, the outer circumference of the upper portion of the rotary column 8 is rotatably supported and installed on the fixing frame 3 by an outer bearing and extends into the cavity of the fixing frame 3, the driven gear 6 is fixedly sleeved at the upper end of the rotary column 8 extending into the cavity of the fixing frame 3, the driven gear 6 is in meshing transmission with the driving gear 5, and the driving gear 5 is in driving connection with the rotary driving motor 4.
A protective positioning sleeve 17 is fixedly arranged in a central through hole of the rotary column 8 by adopting a bearing, the upper end of the protective positioning sleeve 17 is fixedly arranged on the supporting plate 16, the drain pipe is positioned in the protective positioning sleeve 17, and the drainage pump 7 is arranged on the supporting plate 16.
As a better embodiment, the air extraction assembly comprises an air extraction pump 2, an air extraction pipe 13 and an air extraction control valve 15, the air extraction pump 2 is connected to the air extraction pipe 13, the air extraction pipe 13 penetrates through the sealing plugging piece 14 and extends into the extraction hole, and the air extraction control valve 15 is located on the air extraction pipe 13.
In the embodiment, the bottom of the secondary water storage cylinder is arranged in a bearing seat 23, and the bearing seat 23 is fixed at the bottom of the extraction hole in a bonding manner. The diameter of the outer circumference of the primary water storage cylinder 17 is the same as that of the outer circumference of the rotary column 8, and the diameter of the outer circumference of the secondary water storage cylinder 22 is smaller than that of the outer circumference of the rotary column 17. The spiral water delivery blade 11 is shaped such that water can be delivered downward when it rotates, and is an elastic structure made of an elastic material. And liquid level sensors 18 for detecting liquid levels in the primary water storage cylinder and the secondary water storage cylinder are arranged in the primary water storage cylinder and the secondary water storage cylinder.
In addition, the invention also comprises a controller, and the controller is connected with the air suction pump, the water discharge pump and the rotary driving assembly.
The air extraction and drainage device can greatly improve the efficiency of water extraction, ensure the reliable operation of the water extraction pump, ensure the damage risk of the water pump due to the excessively low water level when water is extracted in a mode, simultaneously can completely extract water in the extraction hole, always ensure that the extraction hole is in a state of no water or low water level, and ensure the effect and efficiency of air extraction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The coal bed gas drainage and gas production device is characterized by comprising an air extraction component and a drainage component, wherein a sealing plugging piece is arranged at the upper end of an extraction hole to be extracted, an air extraction pipe of the air extraction component extends into the middle position of the extraction hole through the sealing plugging piece, the drainage component comprises a drainage pump, a rotary driving component, a rotary column, a primary water storage cylinder, a secondary water storage cylinder and a spiral water delivery blade, wherein the rotary column rotatably extends into the extraction hole from the rotary driving component, the lower end of the rotary column is coaxially and fixedly connected with the primary water storage cylinder, the lower end of the primary water storage cylinder is coaxially and fixedly connected with the secondary water storage cylinder, a middle suction pump is arranged at the bottom in the secondary water storage cylinder, an output water pipe end of the middle suction pump is connected into the primary water storage cylinder, and the drainage pump is connected to the bottom position in the primary water storage cylinder through a drainage pipe, the circular part of the second-stage water storage cylinder is provided with spiral water conveying blades matched with the diameter of the extraction hole, a plurality of water inlet holes communicated with the water storage cavity of the second-stage water storage cylinder are densely formed in the outer wall of the upper portion of the second-stage water storage cylinder, the lower portion of the second-stage water storage cylinder is of a non-porous structure enclosed into the water storage cavity, the middle water suction pump is located in the non-porous structure of the water storage cavity of the lower portion of the second-stage water storage cylinder, the rotary driving component drives the rotary column to rotate during air suction and drainage operation, the spiral water conveying blades are driven to convey water at the bottom of the extraction hole downwards to the water inlet hole on the outer wall of the upper portion of the second-stage water storage cylinder, the water flows downwards into the non-porous structure of the water storage cavity, then the middle water suction.
2. The coal bed gas drainage and gas production device according to claim 1, characterized in that: the center of the rotary column is provided with a central through hole, a drain pipe connected with the drainage pump is communicated into the primary water storage barrel through the central through hole, and the drain pipe is provided with a control valve.
3. The coal bed gas drainage and gas production device according to claim 1, characterized in that: the rotary driving assembly comprises a fixing frame, a supporting plate, a rotary driving motor, a driving gear and a driven gear, wherein a cavity is formed in the fixing frame, the supporting plate is fixedly arranged at the upper end of the fixing frame, the outer circumference of the upper portion of the rotary column is rotatably supported by an outer bearing and is installed on the fixing frame, the rotary column stretches into the cavity of the fixing frame, the upper end of the rotary column in the cavity of the fixing frame is fixedly sleeved with the driven gear, the driven gear is in meshing transmission with the driving gear, and the driving gear is in driving connection with the rotary driving motor.
4. The coal bed methane drainage and gas production device according to claim 3, characterized in that: the rotary column is characterized in that a protective positioning sleeve is fixedly arranged in a central through hole of the rotary column through a bearing, the upper end of the protective positioning sleeve is fixedly arranged on the supporting plate, the water discharge pipe is located in the protective positioning sleeve, and the water discharge pump is arranged on the supporting plate.
5. The coal bed gas drainage and gas production device according to claim 1, characterized in that: the air extracting assembly comprises an air extracting pump, an air extracting pipe and an air extracting control valve, the air extracting pump is connected to the air extracting pipe, the air extracting pipe penetrates through the sealing plugging piece and extends into the air extracting hole, and the air extracting control valve is located on the air extracting pipe.
6. The coal bed gas drainage and gas production device according to claim 1, characterized in that: the bottom of the secondary water storage cylinder is arranged in a bearing seat, and the bearing seat is fixed at the bottom of the extraction hole in a binder mode.
7. The coal bed gas drainage and gas production device according to claim 1, characterized in that: the outer circumference diameter of the primary water storage cylinder is the same as that of the rotary column, and the outer diameter of the secondary water storage cylinder is smaller than that of the rotary column.
8. The coal bed gas drainage and gas production device according to claim 1, characterized in that: the spiral water conveying blade is in a shape structure that water can be conveyed downwards when the spiral water conveying blade rotates, and the spiral water conveying blade is in an elastic structure made of elastic materials.
9. The coal bed gas drainage and gas production device according to claim 1, characterized in that: and liquid level sensors for detecting liquid levels in the primary water storage cylinder and the secondary water storage cylinder are arranged in the primary water storage cylinder and the secondary water storage cylinder.
10. The coal bed gas drainage and gas production device according to claim 5, characterized in that: the rotary pump further comprises a controller, and the controller is connected with the air suction pump, the water discharge pump and the rotary driving assembly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068119.7A CN109025912B (en) | 2018-09-13 | 2018-09-13 | Coal bed gas drainage and gas production device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068119.7A CN109025912B (en) | 2018-09-13 | 2018-09-13 | Coal bed gas drainage and gas production device |
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| CN109025912A CN109025912A (en) | 2018-12-18 |
| CN109025912B true CN109025912B (en) | 2020-10-09 |
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| CN109882132B (en) * | 2019-03-19 | 2020-07-28 | 中国地质大学（北京） | Automatic drainage device for coal bed gas |
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