Coal bed gas extraction device

Abstract

The utility model relates to the technical field of coal bed gas extraction equipment, and provides a coal bed gas extraction device which comprises a well mouth flange plate. The connecting pipe is welded on the inner wall of the wellhead flange plate; the groove is formed in the surface of the wellhead flange plate, and a first sealing ring is movably embedded in the groove. According to the utility model, the sealing washer is sleeved on the surface of the mounting pipe, and the mounting pipe is mounted along the internal thread of the thread groove, so that the sealing washer is in contact with the surface of the mounting part for limiting, meanwhile, the sealing ring I is embedded in the groove, and the connecting pipe on the surface of the wellhead flange plate is embedded along the interior of the wellhead; the matched sealing washer can be replaced, the sealing ring I is matched to be in contact with a wellhead, the wellhead flange plate is mounted on the surface of the wellhead by the aid of the locking bolt and the locking nut, double-sealing design is adopted, gas leakage is effectively prevented, and the wellhead flange plate is particularly suitable for long-term stable operation in a high-pressure environment.

Description

Technical Field

[0001] This utility model relates to the technical field of coalbed methane extraction equipment, and in particular to a coalbed methane extraction device. Background Technology

[0002] With the growth of energy demand and the increasing awareness of environmental protection, coalbed methane, as a clean and efficient unconventional natural gas resource, is receiving more and more attention.

[0003] However, in existing technologies, coalbed methane production involves pumping out pressurized water from the coal seam to reduce the pressure and release the adsorbed methane gas. Pumping water to reduce pressure in the coal seam is currently the main method of coalbed methane production. Therefore, it is necessary to use matching extraction wellhead components, pumps, and pressure relief systems. However, some wellhead components are prone to gas leakage due to sealing problems during use, so solutions are needed. Utility Model Content

[0004] The purpose of this invention is to address the problem in the existing technology: during coalbed methane production, the pressure of the coalbed is reduced by pumping out pressurized water, which releases the adsorbed methane gas. Pumping water to reduce pressure in the coalbed is currently the main method of coalbed methane production. Therefore, it is necessary to use matching wellhead components, pumps, and pressure relief systems. However, some wellhead components are prone to gas leakage due to sealing problems during use.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a coalbed methane extraction device, comprising: a wellhead flange; a connecting pipe, welded to the inner wall of the wellhead flange; and further comprising:

[0006] A groove is formed on the surface of the wellhead flange, and a sealing ring is movably embedded inside the groove;

[0007] The mounting part is formed on the surface of one end of the connecting pipe, and the connecting pipe is movably embedded in the inner wall of the sealing ring.

[0008] A threaded groove is formed on the inner wall of one end of the connecting pipe. An installation pipe is threaded into the inner wall of the threaded groove. A sealing gasket is movably fitted on the surface of the installation part. One side of the sealing gasket is movably connected to the surface of the installation pipe. A connecting collar is fixedly provided on the side of the wellhead flange away from the connecting pipe.

[0009] Preferably, the surfaces of the connecting collar at symmetrical locations are provided with grooves, and the inner walls of the two grooves are provided with threaded holes.

[0010] The technical effect of adopting the above-mentioned further solution is that the grooves and threaded holes on the surface of the connecting collar facilitate the quick positioning and connection of parts.

[0011] Preferably, the surface of the connecting collar away from the wellhead flange has a groove, and a sealing ring II is movably embedded inside the groove.

[0012] The technical effect of adopting the above-mentioned further solution is that the groove opened on the surface of the connecting collar facilitates the embedding of the second sealing ring for sealing.

[0013] Preferably, a cover plate is provided on one side surface of the second sealing ring, and a first pipe is provided on the surface of the cover plate away from the wellhead flange and near the center.

[0014] The technical effect of adopting the above-mentioned further solution is that the sealing ring 2 and the first pipe on the surface are fixed by the cover plate. When the sealing ring 2 comes into contact with the part, the sealing work is performed, and at the same time, the first pipe facilitates water flow output.

[0015] Preferably, a second pipe is provided on one side surface of the cover plate, and an installation block is provided symmetrically on one side surface of the cover plate.

[0016] The technical effect of adopting the above-mentioned further solution is that gas is discharged through the second pipe on the surface of the cover plate, while the cover plate fixes the mounting block on the surface.

[0017] Preferably, the inner walls of the two mounting blocks are fixedly provided with sliders, and the two sliders are slidably embedded inside the groove.

[0018] The technical advantage of adopting the above-mentioned further solution is that the sliding groove provides a limiting function for the slider on the surface of the mounting block, which facilitates installation.

[0019] Preferably, bolts are movably embedded inside the two mounting blocks.

[0020] The technical effect of adopting the above-mentioned further solution is that the bolt is limited by the mounting block.

[0021] Preferably, one end of each of the two bolts is threaded into the inner wall of the threaded hole.

[0022] The technical effect of adopting the above-mentioned further solution is that the cover plate is fixed by the threaded end of the bolt being embedded in the threaded hole.

[0023] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0024] 1. In this utility model, a sealing gasket is fitted onto the surface of the mounting pipe, and the mounting pipe is installed along the internal thread of the threaded groove, so that the sealing gasket contacts the surface of the mounting part for limiting. At the same time, a sealing ring is embedded in the groove, and the connecting pipe on the surface of the wellhead flange is embedded along the inside of the wellhead. Depending on the size of the wellhead, a matching sealing gasket can be replaced. The sealing ring contacts the wellhead, and the wellhead flange is installed on the surface of the wellhead with the help of locking bolts and locking nuts. The double sealing design effectively prevents gas leakage, and is especially suitable for long-term stable operation under high pressure environment.

[0025] 2. In this utility model, by embedding the slider on the surface of the mounting block along the groove, the sealing ring is embedded inside the groove to provide a sealing function. A bolt is used to penetrate the mounting block, and one end is threaded into the threaded hole to complete the positioning of the cover plate. The first and second pipes on the surface are respectively used to transport liquid and gas. The standardized design of the whole equipment facilitates rapid on-site assembly and reduces construction time and cost. Attached Figure Description

[0026] Figure 1 This utility model provides a partially unfolded structural schematic diagram of a coalbed methane extraction device;

[0027] Figure 2 This utility model provides a side view of a coalbed methane extraction device.

[0028] Figure 3 This utility model provides a partial cross-sectional structural diagram of a coalbed methane extraction device;

[0029] Figure 4 This utility model proposes a coalbed methane extraction device. Figure 1 Enlarged structural diagram at point A in the middle.

[0030] Legend:

[0031] 1. Wellhead flange; 101. Groove; 1011. Sealing ring one; 102. Connecting pipe; 1021. Mounting part; 1022. Threaded groove; 1023. Sealing gasket; 103. Mounting pipe; 104. Connecting collar; 1041. Slide groove; 1042. Threaded hole; 1043. Groove opening; 105. Cover plate; 1051. Sealing ring two; 1052. Mounting block; 1053. Sliding block; 1054. Bolt; 1055. First pipe; 1056. Second pipe. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0034] Example 1, such as Figure 1-4 As shown, this utility model provides a coalbed methane extraction device, including: a wellhead flange 1; a connecting pipe 102, welded to the inner wall of the wellhead flange 1; and further including: a groove 101, formed on the surface of the wellhead flange 1, with a sealing ring 1011 movably embedded inside the groove 101; an installation part 1021, formed on the surface of one end of the connecting pipe 102, with the connecting pipe 102 movably embedded in the inner wall of the sealing ring 1011; a threaded groove 1022, formed on the inner wall of one end of the connecting pipe 102, with an installation pipe 103 threadedly embedded in the inner wall of the threaded groove 1022; a sealing gasket 1023 movably sleeved on the surface of the installation part 1021; one side of the sealing gasket 1023 movably connected to the surface of the installation pipe 103; and a connecting collar 104 fixedly provided on the side of the wellhead flange 1 away from the connecting pipe 102.

[0035] In this embodiment, the sealing gasket 1023 is fitted onto the surface of the mounting pipe 103, and the mounting pipe 103 is installed along the internal thread of the threaded groove 1022, so that the sealing gasket 1023 contacts the surface of the mounting part 1021 for limiting. At the same time, the sealing ring 1011 is embedded in the groove 101, and the connecting pipe 102 on the surface of the wellhead flange 1 is embedded along the inside of the wellhead. Depending on the size of the wellhead, the matching sealing gasket 1023 can be replaced, and the sealing ring 1011 contacts the wellhead. With the help of locking bolts and locking nuts, the wellhead flange 1 is installed on the surface of the wellhead. The double sealing design effectively prevents gas leakage, and is especially suitable for long-term stable operation under high pressure environment.

[0036] In Example 2, the surface of the connecting collar 104 is provided with a sliding groove 1041 at the symmetrical location. The inner wall of the two sliding grooves 1041 is provided with a threaded hole 1042. The surface of the connecting collar 104 away from the wellhead flange 1 is provided with a slot 1043. A second sealing ring 1051 is movably embedded in the slot 1043. A cover plate 105 is provided on one side surface of the second sealing ring 1051. A first pipe 1055 is provided on the surface of the cover plate 105 away from the wellhead flange 1 and near the center. A second pipe 1056 is provided on one side surface of the cover plate 105. Mounting blocks 1052 are provided at the symmetrical location on one side surface of the cover plate 105. Slider blocks 1053 are fixedly provided on the inner wall of the two mounting blocks 1052. The two slider blocks 1053 are slidably embedded in the sliding grooves 1041. Bolts 1054 are movably embedded in the two mounting blocks 1052. One end of the two bolts 1054 is threaded into the inner wall of the threaded hole 1042.

[0037] In this embodiment, by embedding the slider 1053 on the surface of the mounting block 1052 along the groove 1041, the sealing ring 1051 is embedded inside the groove 1043 to provide a seal. The bolt 1054 passes through the mounting block 1052 and is threaded into the threaded hole 1042 to complete the positioning of the cover plate 105. The first pipe 1055 and the second pipe 1056 on the surface respectively transport liquid and gas. The standardized design of the whole equipment facilitates rapid on-site assembly and reduces construction time and cost.

[0038] Working principle: In use, the sealing gasket 1023 is fitted onto the surface of the mounting pipe 103, and the mounting pipe 103 is installed along the internal threads of the threaded groove 1022, so that the sealing gasket 1023 contacts the surface of the mounting part 1021 for limiting. At the same time, the sealing ring 1011 is embedded in the groove 101. The connecting pipe 102 on the surface of the wellhead flange 1 is embedded along the inside of the wellhead. Depending on the size of the wellhead, a matching sealing gasket 1023 can be replaced, which, together with the sealing ring 1011, contacts the wellhead. With the help of locking bolts and locking nuts, the wellhead flange 1 is installed on the surface of the wellhead. A double sealing design is adopted. It effectively prevents gas leakage, and is especially suitable for long-term stable operation under high pressure. In addition, by embedding the slider 1053 on the surface of the mounting block 1052 along the groove 1041, the sealing ring 1051 is embedded in the groove 1043 to provide a seal. The bolt 1054 passes through the mounting block 1052 and is threaded into the threaded hole 1042 to complete the positioning of the cover plate 105. The first pipe 1055 and the second pipe 1056 on the surface transport liquid and gas respectively. The standardized design of the whole equipment facilitates rapid on-site assembly and reduces construction time and cost.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A coalbed methane extraction device, comprising: Wellhead flange (1); A connecting pipe (102) is welded to the inner wall of the wellhead flange (1); characterized in that it further includes: A groove (101) is formed on the surface of the wellhead flange (1), and a sealing ring (1011) is movably embedded inside the groove (101). The mounting part (1021) is provided on the surface of one end of the connecting pipe (102), and the connecting pipe (102) is movably embedded in the inner wall of the sealing ring (1011); A threaded groove (1022) is formed on the inner wall of one end of the connecting pipe (102). The inner wall of the threaded groove (1022) is threaded with an installation pipe (103). A sealing gasket (1023) is movably fitted on the surface of the mounting part (1021). One side surface of the sealing gasket (1023) is movably connected to the surface of the installation pipe (103). A connecting collar (104) is fixedly provided on the side surface of the wellhead flange (1) away from the connecting pipe (102).

2. The coalbed methane extraction device according to claim 1, characterized in that: The surface of the connecting collar (104) at symmetrical locations is provided with grooves (1041), and the inner walls of the two grooves (1041) are provided with threaded holes (1042).

3. The coalbed methane extraction device according to claim 2, characterized in that: The connecting collar (104) has a groove (1043) on its surface away from the wellhead flange (1), and a sealing ring (1051) is movably embedded inside the groove (1043).

4. A coalbed methane extraction device according to claim 3, characterized in that: A cover plate (105) is provided on one side surface of the sealing ring 2 (1051), and a first pipe (1055) is provided on the surface of the cover plate (105) away from the wellhead flange (1) and close to the center.

5. A coalbed methane extraction device according to claim 4, characterized in that: A second pipe (1056) is provided on one side surface of the cover plate (105), and an installation block (1052) is provided at the symmetrical position of one side surface of the cover plate (105).

6. A coalbed methane extraction device according to claim 5, characterized in that: The inner walls of the two mounting blocks (1052) are fixedly provided with sliders (1053), and the two sliders (1053) are slidably embedded in the inside of the groove (1041).

7. A coalbed methane extraction device according to claim 6, characterized in that: Bolts (1054) are movably embedded inside the two mounting blocks (1052).

8. A coalbed methane extraction device according to claim 7, characterized in that: One end of each of the two bolts (1054) is threaded into the inner wall of the threaded hole (1042).

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