Coal bed gas development well

Abstract

The utility model discloses a coal bed gas development well, and relates to the technical field of coal bed gas development. The coal-bed gas development well comprises a coal-bed gas well main body, the coal-bed gas well main body comprises a well shell main body and a reinforcing layer, and the reinforcing layer is installed on the inner wall of the well shell main body; the well cover comprises a sealing ring, the sealing ring is installed at the top of the well shell body, a plurality of notches are formed in the top of the sealing ring, and a sealing cover is arranged at the top of the sealing ring. According to the coal bed gas development well, the well lid is used, the coal bed gas development well has dustproof and waterproof functions, the sealing cover, the sealing block and the sealing ring are used in cooperation, the coal bed gas well is in a sealed state, when mining is not needed, external dust and rainwater can be shielded, some troubles are avoided during mining, and the practicability of the coal bed gas development well is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coalbed methane development, and in particular to a coalbed methane development well. Background Art

[0002] It is a natural gas resource that mainly exists in coal mines. It is formed by the accumulation, compaction and transformation of plants over a long geological period. The main component is methane, and it also contains a small amount of ethane, propane, butane and other hydrocarbon gases. Coalbed methane wells are wells used to mine coalbed methane.

[0003] The coalbed methane extraction process is to pump out the pressurized water in the coal reservoir to reduce the coal seam pressure to below the desorption pressure of the coal, thereby desorbing the adsorbed methane into a large amount of free methane, which is transported to the wellbore through two different mechanisms: diffusion and flow. If the wellhead is uncovered, the coal powder in the well may clog the cracks / pipes and affect the gas production efficiency. At the same time, long-term exposure will cause dust to fall into the coalbed methane well. Rainwater will fall into the coalbed methane well on rainy days, reducing the practicality of the coalbed methane well. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a coalbed methane development well. Through the use of a well cover, dust and rainwater outside the well can be shielded to avoid long-term exposure, which would cause dust and rainwater to accumulate in the well and affect subsequent mining, thereby improving the practicality of the coalbed methane mining well.

[0005] In order to achieve the above objectives, this utility model is implemented through the following technical solutions:

[0006] A coalbed methane development well, comprising:

[0007] A coalbed methane well body, the coalbed methane well body comprising a well casing body and a reinforcement layer, the reinforcement layer being installed on the inner wall of the well casing body;

[0008] A manhole cover, comprising a sealing ring, which is installed on the top of the manhole shell body, a plurality of notches are arranged on the top of the sealing ring, and a sealing cover is arranged on the top of the sealing ring.

[0009] Preferably, a dust shield is installed on the top of the sealing ring, and the reinforcement layer is made of high-strength steel.

[0010] Preferably, a sealing block is installed at the bottom of the sealing cover to ensure a sealing connection between the sealing cover and the well casing body.

[0011] Preferably, a pressure detector is provided on the top of the sealing cover, and the bottom of the pressure detector passes through the sealing cover and the sealing block.

[0012] Preferably, a pressure relief port is provided at the top of the sealing cover, and a sealing plug is provided at the pressure relief port.

[0013] Preferably, a temperature detector is installed at the bottom of the sealing block, and a handle is installed at the top of the sealing cover.

[0014] Preferably, the inner ring annular array of the sealing ring is provided with a plurality of lighting lamps.

[0015] The utility model provides a coalbed methane development well. Compared with the prior art, it has the following beneficial effects:

[0016] Through the use of manhole covers, it has dustproof and waterproof functions. Through the coordinated use of sealing covers, sealing blocks and sealing rings, the coalbed methane well is in a sealed state. When no mining is needed, it can block external dust and rainwater, avoiding some troubles during mining and improving the practicability of coalbed methane development wells.

[0017] Through the coordinated use of pressure detectors, temperature detectors and lighting lamps, parameters such as temperature and pressure in the well can be monitored in real time, remote monitoring and data analysis can be achieved, safety and efficiency can be improved, and the lighting effect in the well can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the well body.

[0021] Figure 3 It is a schematic diagram of the structure of the sealing cover.

[0022] Figure 4 It is a schematic diagram of the structure of the pressure detector.

[0023] Figure 5 A schematic diagram of the structure of a lighting lamp.

[0024] Figure 6 It is a schematic diagram of the structure of the temperature detector.

[0025] The reference numerals in the figure are:

[0026] 1. Coalbed methane well body; 101. Well shell body; 102. Reinforcement layer; 2. Well cover; 201. Sealing cover; 202. Sealing ring; 203. Pressure relief port; 204. Notch; 205. Sealing block; 3. Dust shield; 4. Pressure detector; 5. Sealing plug; 6. Handle; 7. Light; 8. Temperature detector. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the practical embodiment clearer, the technical solution in the practical embodiment is clearly and completely described. Obviously, the described embodiment is a part of the practical embodiment, not all of the embodiments. Based on the embodiments in this practical, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this practical.

[0028] The embodiment of the present application solves the problem that coal dust may clog the pipe column by providing a coalbed methane development well. When in use, the sealed cover of the wellhead can effectively prevent dust and rainwater from entering the well when no mining is needed. During coal mining, the environment around the wellhead is usually very harsh, and the air is filled with a large amount of coal dust. If this coal dust is blown into the well by the wind, it will not only affect the quality of the coal, but may also pose a threat to the health of the miners. In addition, rainwater may also flow into the well through the wellhead, causing the water level in the mine to rise, increasing the difficulty of the miners' work and safety risks. Therefore, it is very necessary to achieve a sealed cover on the wellhead.

[0029] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Reference Figure 1-6 , a coalbed methane development well, comprising;

[0031] A coalbed methane well body 1, the coalbed methane well body 1 comprises a well casing body 101 and a reinforcement layer 102, the reinforcement layer 102 is installed on the inner wall of the well casing body 101;

[0032] The manhole cover 2 includes a sealing ring 202 , which is installed on the top of the manhole shell body 101 . A plurality of notches 204 are arranged on the top of the sealing ring 202 , and a sealing cover 201 is arranged on the top of the sealing ring 202 .

[0033] In a further embodiment, a dust shield 3 is installed on the top of the sealing ring 202, and the reinforcing layer 102 is made of high-strength steel.

[0034] The main function of the dust shield 3 is to block dust and prevent dust from being blown up by wind, thereby improving the dust prevention effect of the coalbed methane well. At the same time, the dust shield 3 may also have the function of preventing wind and dust. By changing the aerodynamic properties, a pressure difference between inside and outside is formed, which further suppresses the flying of dust. In addition, the dust shield 3 may also help to achieve sound insulation and cold protection effects.

[0035] In a further embodiment, a sealing block 205 is installed at the bottom of the sealing cover 201 to seal the sealing cover 201 and the well casing body 101 .

[0036] The main function of the sealing block 205 is to achieve a sealed connection between the sealing cover 201 and the well casing body 101, to prevent fluid or solid particles from leaking out from the joint surfaces, and to prevent external impurities such as dust and moisture from invading the interior of the coalbed methane well.

[0037] In a further embodiment, a pressure detector 4 is disposed on the top of the sealing cover 201 , and the bottom of the pressure detector 4 passes through the sealing cover 201 and the sealing block 205 .

[0038] The pressure detector 4 is a sensor that can sense the pressure of liquid and gas. Its working principle is to convert the received pressure signal into a usable electrical signal. Such a device is set on the top of the sealing cover 201 to monitor the pressure inside the well shell body 101 in real time. This detection method is conducive to early warning of possible problems.

[0039] In a further embodiment, a pressure relief port 203 is provided at the top of the sealing cover 201 , and a sealing plug 5 is provided at the pressure relief port 203 .

[0040] The pressure relief port 203 is a structure opened on the top of the sealing cover 201. Its main function here is to prevent damage to the coal seam well caused by excessive pressure. When the pressure inside the well shell body 101 rises to a certain value, part of the air and fluid will be released to the outside of the protection area in time through the pressure relief port 203 to ensure the safety of the coal seam well.

[0041] In a further embodiment, a temperature detector 8 is installed at the bottom of the sealing block 205 , and a handle 6 is installed at the top of the sealing cover 201 .

[0042] The main function of the temperature detector 8 is to measure the temperature inside the coal seam well. A temperature detector 8 is installed at the bottom of the sealing cover 201, which can detect the ambient temperature and output signals to the display table through resistance, current, voltage, digital and other output methods to display temperature data on site. In addition, the temperature detector 8 can also transmit data to the collector, and realize on-site display of temperature data, storage of historical records, output of data analysis charts or corresponding calculations, and control of heating and cooling equipment through software.

[0043] In a further embodiment, a plurality of lighting lamps 7 are provided in an inner annular array of the sealing ring 202 .

[0044] The lighting lamp 7 is arranged in the inner ring array of the sealing ring 202. Its main function is to provide sufficient lighting. In certain specific environments and working conditions, when working in places where the light is dim or unevenly distributed, the lighting lamp 7 can help the operator see the working environment and task progress more clearly, improve the accuracy and efficiency of the work, and at the same time, in certain special circumstances, such as emergencies or emergency processing, the lighting lamp 7 can also provide necessary on-site lighting to ensure the personal safety of the operator.

[0045] During use, when mining is not needed, the sealing cover 201 is covered, and the sealing cover 201 is sealed and connected to the well shell body 101 through the sealing block 205 to prevent rainwater from falling into the well shell body 101 on rainy days. The temperature and pressure and other parameters in the well can be detected in real time through the pressure detector 4 and the temperature detector 8, and the well can be illuminated by the lighting lamp 7.

[0046] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0047] By using the manhole cover 2, the coalbed methane well has dustproof and waterproof functions. By using the manhole cover 2, the coalbed methane well can achieve dustproof and waterproof functions. The synergistic effect of the sealing cover 201, the sealing block 205 and the sealing ring 202 makes the coalbed methane well in a sealed state. When mining is not needed, it can effectively block external dust and rainwater. This design improves the practicability of the coalbed methane development well.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A coalbed methane development well, characterized in that: include: A coalbed methane well body (1), the coalbed methane well body (1) comprising a well casing body (101) and a reinforcement layer (102), the reinforcement layer (102) being installed on the inner wall of the well casing body (101); A manhole cover (2), the manhole cover (2) comprising a sealing ring (202), the sealing ring (202) being mounted on the top of a manhole casing body (101), a plurality of notches (204) being arranged on the top of the sealing ring (202), and a sealing cover (201) being arranged on the top of the sealing ring (202).

2. The coalbed methane development well according to claim 1, characterized in that: A dust shield (3) is installed on the top of the sealing ring (202), and the reinforcement layer (102) is made of high-strength steel.

3. The coalbed methane development well according to claim 1, characterized in that: A sealing block (205) is installed at the bottom of the sealing cover (201) to ensure a sealing connection between the sealing cover (201) and the well casing body (101).

4. The coalbed methane development well according to claim 1, characterized in that: A pressure detector (4) is provided on the top of the sealing cover (201), and the bottom of the pressure detector (4) penetrates the sealing cover (201) and the sealing block (205).

5. The coalbed methane development well according to claim 1, characterized in that: A pressure relief port (203) is provided at the top of the sealing cover (201), and a sealing plug (5) is provided at the pressure relief port (203).

6. The coalbed methane development well according to claim 4, characterized in that: A temperature detector (8) is installed at the bottom of the sealing block (205), and a handle (6) is installed at the top of the sealing cover (201).

7. The coalbed methane development well according to claim 1, characterized in that: The inner ring of the sealing ring (202) is provided with a plurality of lighting lamps (7) in an annular array.

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