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CN-224214157-U - Coalbed methane extraction device

CN224214157UCN 224214157 UCN224214157 UCN 224214157UCN-224214157-U

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 wellhead flange, a connecting pipe and a groove, wherein the connecting pipe is welded on the inner wall of the wellhead flange, the groove is formed in the surface of the wellhead flange, and a sealing ring I is movably embedded in the groove. According to the utility model, the sealing gasket is sleeved on the surface of the mounting pipe, the mounting pipe is mounted along the internal threads of the thread groove, so that the sealing gasket is in contact with the surface of the mounting part for limiting, meanwhile, the first sealing ring is embedded in the groove, the connecting pipe on the surface of the wellhead flange is embedded in the wellhead along the interior of the wellhead, the sealing gasket which is matched with the first sealing ring can be replaced according to the wellheads with different sizes, the wellhead flange is mounted on the surface of the wellhead by means of the locking bolt and the locking nut in a double sealing design, and the sealing gasket is particularly suitable for long-term stable operation in a high-pressure environment.

Inventors

  • XU YANPENG
  • GUO LEIQIANG
  • BAI XIAOHONG
  • WAN BEIBEI
  • XU LIN

Assignees

  • 河南安亿工矿科技有限公司

Dates

Publication Date
20260508
Application Date
20250530

Claims (8)

  1. 1. The coalbed methane extraction device comprises a wellhead flange plate (1), a connecting pipe (102) and a connecting pipe, wherein the connecting pipe is welded on the inner wall of the wellhead flange plate (1), and the coalbed methane extraction device is characterized by further comprising: The groove (101) is formed in the surface of the wellhead flange plate (1), and a first sealing ring (1011) is movably embedded in the groove (101); a mounting part (1021) arranged on the surface of one end of the connecting pipe (102), wherein the connecting pipe (102) is movably embedded in the inner wall of the first sealing ring (1011); The screw thread groove (1022) is formed in the inner wall of one end of the connecting pipe (102), the mounting pipe (103) is embedded in the inner wall of the screw thread groove (1022), a sealing gasket (1023) is movably sleeved on the surface of the mounting portion (1021), one side surface of the sealing gasket (1023) is movably connected to the surface of the mounting pipe (103), and a connecting lantern ring (104) is fixedly arranged on one side surface of the wellhead flange (1) away from the connecting pipe (102).
  2. 2. The coalbed methane extraction device according to claim 1, wherein sliding grooves (1041) are formed in the symmetrical surfaces of the connecting lantern ring (104), and threaded holes (1042) are formed in the inner walls of the two sliding grooves (1041).
  3. 3. The coalbed methane extraction device according to claim 2, wherein a notch (1043) is formed in the surface, far away from a wellhead flange plate (1), of the connecting collar (104), and a sealing ring II (1051) is movably embedded in the notch (1043).
  4. 4. The coalbed methane extraction device according to claim 3, wherein a cover plate (105) is arranged on one side surface of the second sealing ring (1051), and a first pipeline (1055) is arranged on the surface, close to the center, of the cover plate (105) away from the wellhead flange (1).
  5. 5. The coalbed methane extraction device according to claim 4, wherein a second pipeline (1056) is arranged on one side surface of the cover plate (105), and mounting blocks (1052) are arranged at symmetrical positions of one side surface of the cover plate (105).
  6. 6. The coalbed methane extraction device according to claim 5, wherein sliding blocks (1053) are fixedly arranged on the inner walls of the two mounting blocks (1052), and the two sliding blocks (1053) are slidably embedded in the sliding groove (1041).
  7. 7. The coalbed methane extraction device according to claim 6, wherein bolts (1054) are movably embedded in the two mounting blocks (1052).
  8. 8. The coalbed methane extraction device according to claim 7, wherein one end of each of the two bolts (1054) is in threaded engagement with the inner wall of the threaded hole (1042).

Description

Coalbed methane extraction device Technical Field The utility model relates to the technical field of coal bed gas extraction equipment, in particular to a coal bed gas extraction device. Background With the increase of energy demands and the increase of environmental awareness, coal bed gas is receiving more and more attention as a clean and efficient unconventional natural gas resource. However, in the prior art, when the coalbed methane is produced, the pressure of the coalbed is reduced by pumping and draining the pressure-bearing water in the coalbed, so that the methane gas adsorbed in the coalbed is released, and the pumping and the depressurization of the coalbed are the main methods for producing the coalbed methane at present, so that a matched pumping wellhead assembly, a pump body, a drainage system and the like are required, but when a part of wellhead assemblies are used, the condition of gas leakage is easily caused by the sealing problem, and therefore, the problems need to be solved. Disclosure of utility model The utility model aims to solve the problems that in the prior art, when the coalbed methane is produced, the pressure of the coalbed is reduced by pumping and draining the pressure-bearing water in the coalbed, so that the methane gas adsorbed in the coalbed is released, and the pumping and the depressurization of the coalbed are the main methods for producing the coalbed methane at present, so that a matched pumping wellhead assembly, a pump body, a pressure draining system and the like are required to be used, but when part of wellhead assemblies are used, the gas leakage is easy to occur due to the sealing problem. In order to achieve the purpose, the utility model adopts the following technical scheme that the coal bed gas extraction device comprises a wellhead flange, a connecting pipe and a connecting pipe, wherein the connecting pipe is welded on the inner wall of the wellhead flange, and the device further comprises: The groove is formed in the surface of the wellhead flange plate, and a first sealing ring is movably embedded in the groove; The installation part is arranged on the surface of one end of the connecting pipe, and the connecting pipe is movably embedded in the inner wall of the first sealing ring; The screw thread groove is formed in the inner wall of one end of the connecting pipe, the installation pipe is embedded in the inner wall of the screw thread groove in a threaded manner, the sealing gasket is movably sleeved on the surface of the installation part, one side surface of the sealing gasket is movably connected onto the surface of the installation pipe, and a connecting lantern ring is fixedly arranged on one side surface of the wellhead flange plate, which is far away from the connecting pipe. Preferably, the surfaces of the symmetrical parts of the connecting lantern rings are provided with sliding grooves, and the inner walls of the two sliding grooves are provided with threaded holes. The technical effect of adopting the further scheme is that the quick positioning and connecting work of the parts is facilitated through the sliding groove and the threaded hole which are formed in the surface of the connecting lantern ring. Preferably, the surface of the connecting lantern ring far away from the wellhead flange plate is provided with a notch, and a second sealing ring is movably embedded in the notch. The technical effect of adopting the further scheme is that the sealing ring is convenient to be embedded by the notch formed in the surface of the connecting lantern ring, so that sealing work is carried out. Preferably, a cover plate is arranged on the surface of one side of the second sealing ring, and a first pipeline is arranged on the surface, close to the center, of the cover plate, away from the wellhead flange. The technical effect of adopting the further scheme is that the second sealing ring and the first pipeline on the surface are fixed through the cover plate, when the second sealing ring contacts with a part, sealing work is carried out, and meanwhile, the first pipeline facilitates water flow output. Preferably, a second pipeline is arranged on one side surface of the cover plate, and mounting blocks are arranged at symmetrical positions of one side surface of the cover plate. The technical effect of adopting the further scheme is that the gas is discharged through the second pipeline on the surface of the cover plate, and the cover plate fixes the mounting blocks on the surface. Preferably, the inner walls of the two mounting blocks are fixedly provided with sliding blocks, and the two sliding blocks are slidably embedded in the sliding grooves. The technical effect of adopting the further scheme is that the sliding blocks on the surface of the installation block are provided with limiting work through the sliding grooves, so that the installation is convenient. Preferably, bolts are movably embedded in the two mounting blocks. The techni