CN-224228655-U - Pressurized gas lifting drainage gas production device

Abstract

The utility model relates to the technical field of natural gas exploitation, in particular to a pressurized gas-lift drainage gas exploitation device which comprises a natural gas well, an air pump, a gravity gas-liquid separator, a sealing cover, an air injection pipe and an extrusion pipe, wherein the sealing cover is fixedly arranged at the top end of the natural gas well, the air injection pipe is arranged between the sealing cover and the air pump, the extrusion pipe is arranged between the gravity gas-liquid separator and the sealing cover and extends into the natural gas well, a connecting pipe is fixedly arranged on the gravity gas-liquid separator, a flash tank is fixedly arranged at the tail end of the connecting pipe, a recovery pipe is fixedly arranged on the flash tank, an air supply group is fixedly arranged at the tail end of the recovery pipe, the air supply group comprises a first nitrogen tank, a second nitrogen tank, a three-way pipe, a normally-closed electromagnetic valve and a normally-open electromagnetic valve, and the inside of the natural gas well is kept in a high environment through nitrogen supply by the air supply group, so that the effect of continuously conducting gas exploitation operation is achieved.

Inventors

• YAN ZIKAI
• XIE ERZHONG
• ZENG CHENG
• YANG XU
• TAO WEILE
• LI TING
• ZHANG LEIPING

Assignees

• 成都立联科能源科技有限公司

Dates

Publication Date

20260512

Application Date

20250613

Claims (8)

1. 1. The pressurized gas lift drainage gas production device comprises a natural gas well (1), a gas pump (2), a gravity gas-liquid separator (3), a sealing cover (4), a gas injection pipe (5) and an extrusion pipe (6), and is characterized in that the sealing cover (4) is fixedly arranged at the top end of the natural gas well (1), the gas injection pipe (5) is arranged between the sealing cover (4) and the gas pump (2), the extrusion pipe (6) is arranged between the gravity gas-liquid separator (3) and the sealing cover (4), and the extrusion pipe (6) stretches into the natural gas well (1); The gravity gas-liquid separator is characterized in that a connecting pipe (7) is fixedly installed on the gravity gas-liquid separator (3), a flash tank (8) is fixedly installed at the tail end of the connecting pipe (7), a recovery pipe (9) is fixedly installed on the flash tank (8), a gas supply group is fixedly installed at the tail end of the recovery pipe (9), and the gas supply group comprises a first nitrogen tank (11), a second nitrogen tank (12), a three-way pipe (13), a normally closed electromagnetic valve (14) and a normally open electromagnetic valve (15).
2. 2. A pressurized gas lift drainage gas production device according to claim 1, characterized in that the first nitrogen tank (11) and the second nitrogen tank (12) are in communication with the gas pump (2) via a tee (13).
3. 3. A pressurized gas lifted water and gas production device according to claim 1, characterized in that the first nitrogen tank (11) and the second nitrogen tank (12) are in communication with the flash tank (8) via a recovery pipe (9).
4. 4. A pressurized gas lift drainage gas production device according to claim 1, characterized in that a solenoid valve assembly is arranged between the first nitrogen tank (11) and the second nitrogen tank (12) and the recovery pipe (9) and the tee pipe (13).
5. 5. A pressurized gas lifted water and gas production device according to claim 4, wherein the solenoid valve assembly comprises a normally closed solenoid valve (14), a normally open solenoid valve (15).
6. 6. A pressurized gas lift drainage gas production device according to claim 5, characterized in that the normally closed solenoid valve (14) and the normally open solenoid valve (15) are connected in series by a wire.
7. 7. A pressurized gas lift drainage gas production device according to claim 1, characterized in that a liquid level sensor (16) is fixedly arranged inside the gravity gas-liquid separator (3).
8. 8. A pressurized gas lifted water and gas production device according to claim 7, wherein the level sensor (16) is lower than the extrusion tube (6).

Description

Pressurized gas lifting drainage gas production device Technical Field The utility model relates to the technical field of natural gas exploitation, in particular to a pressurized gas lifting drainage gas exploitation device. Background In the gas field exploitation process, along with the increase of exploitation time and the continuous consumption of stratum energy, the bottom of a gas well is easy to generate hydrops phenomenon, which can seriously affect the normal gas production of the gas well and lead to the reduction of the gas well yield and even the production stoppage, so that the efficient pressurizing gas lift drainage gas production device is important for the continuous and stable exploitation of the gas field, and in practical application, the pressurizing gas lift drainage gas production device generally needs the following technology: 1. A pressurizing mechanism, such as a compressor, capable of pressurizing gas injected into a gas well so as to have a sufficient pressure to lift a bottom hole liquid to the surface; 2. A gas-liquid separation mechanism such as a gravity separator or a centrifugal separator, which performs effective gas-liquid separation after the discharged gas-liquid mixed fluid reaches the ground; 3. The injection control mechanism comprises various valves and control systems, and is used for accurately controlling parameters such as the injection quantity, the injection pressure, the injection time and the like of the pressurized gas, and flexibly adjusting the parameters according to the actual production condition of the gas well so as to achieve the optimal drainage and gas production effect. The prior Chinese patent is characterized by comprising a CN207004489U, a natural gas compressor, a gas-liquid separation tank and a sealing cover fixedly arranged at the top of a gas well, wherein the top of the sealing cover is provided with a joint and a central hole communicated with the gas well, a conveying pipe is fixedly arranged in the central hole, the lower end part of the conveying pipe extends in the gas well, the upper end part of the conveying pipe extends out of the gas well, a liquid inlet and a liquid outlet are arranged on the side wall of the gas-liquid separation tank, the liquid inlet is connected with the upper end part of the conveying pipe, the liquid outlet is connected with a stop valve, the top of the gas-liquid separation tank is provided with a gas outlet, the gas outlet is connected with the inlet end of the natural gas compressor, the natural gas compressor is provided with an outlet end A and an outlet end B, the outlet end B of the natural gas compressor is connected with the joint, and the outlet end A of the natural gas compressor is connected with a conveying pipeline. However, in the process of implementing the technical scheme, the drainage gas production device has the technical problems that after the natural gas and the accumulated liquid are extruded, the gas pressure in the natural gas well is reduced, the discharged accumulated liquid is discharged to the outside, part of the produced natural gas is stored, part of the natural gas is compressed and then is reinjected into the natural gas well, the gas pressure in the natural gas well is reduced along with the discharge of the natural gas and the accumulated liquid, the compressed natural gas is reinflated to the original volume after entering, and the inside of the natural gas well still cannot be maintained at high pressure, so that the gas production operation cannot be continuously performed along with the discharge of the natural gas and the accumulated liquid due to the reduction of the gas pressure in the well. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a pressurized gas lifting drainage gas production device, which solves the technical problems that after natural gas and accumulated liquid are extruded, the air pressure in a natural gas well is reduced, the discharged accumulated liquid is discharged to the outside, part of the extracted natural gas is stored, part of the extracted natural gas is compressed and then is reinjected into the natural gas well, the air pressure in the natural gas well is reduced along with the discharge of the natural gas and the accumulated liquid, the compressed natural gas is re-expanded to the original volume after entering, and the high pressure still cannot be maintained in the natural gas well, so that the gas production operation cannot be continuously carried out along with the discharge of the natural gas and the accumulated liquid due to the reduction of the air pressure in the well. In order to achieve the above purpose, the utility model is realized by the following technical scheme: The pressurizing gas-lift drainage gas production device comprises a natural gas well, an air pump, a gravity gas-liquid separator, a sealing cover, an air injection pipe and an extrusion pipe, wherein the