A protection device for supercharging exploitation of a shale gas field

Abstract

This utility model relates to the field of natural gas extraction and protection technology, specifically a protection device for pressurized extraction in shale gas fields. It includes: a compressor with an inlet pipe and an outlet pipe; an inlet electric valve on the inlet pipe; an outlet electric valve on the outlet pipe; a pressure relief pipe on the inlet pipe; and a pressure sensor, a pressure relief electric valve, and a one-way valve sequentially mounted on the pressure relief pipe. A pressure relief tank is connected to the pressure relief pipe. This utility model uses the pressure relief tank to store natural gas accumulated in the inlet pipe, ensuring smooth and stable exhaust. An over-accumulated gas is burned off by a natural gas combustion flare. The outlet pipe facilitates the recovery of natural gas from the pressure relief tank.

Description

Technical Field

[0001] This utility model relates to the field of natural gas extraction protection technology, specifically a protection device for pressurized extraction of shale gas fields. Background Technology

[0002] A protective device for booster extraction in shale gas fields, disclosed in publication number CN213684081U, includes a compressor assembly, a metering separator skid, and a production separator skid. The inlet of the compressor assembly is connected to the metering separator skid and the production separator skid via a first pipe, and the outlet of the compressor assembly is connected to an external transmission pipeline via a second pipe. A first gate valve, a check valve, and a second gate valve are sequentially connected between the first and second pipes. The inlet of the compressor assembly is equipped with a first electric valve, and the outlet of the compressor assembly is equipped with a second electric valve. When the compressor assembly fails and shuts down, the first and second electric valves at the compressor inlet and outlet close. When the wellhead pressure recovers relatively quickly and reaches the opening pressure of the check valve, the check valve automatically opens, allowing shale gas to be smoothly transmitted through the check valve, thus ensuring the safety of the medium-pressure equipment.

[0003] However, when the aforementioned protective device for boosting the production of shale gas fields is in use, the second pipeline is sometimes connected to a high-pressure storage device. It needs to be pressurized by the compressor assembly and pumped into the storage device. At this time, the gas pressure in the second pipeline is relatively high. When the first electric valve and the second electric valve are closed, the gas pressure in the first pipeline is difficult to guarantee that it can push open the check valve. Utility Model Content

[0004] The purpose of this invention is to provide a protective device for pressurized extraction of shale gas fields, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A protective device for pressurized extraction in shale gas fields, comprising: A compressor, wherein the compressor is provided with an intake pipe and an exhaust pipe; An intake electric valve is installed on the intake pipe, and an exhaust electric valve is installed on the exhaust pipe. The intake pipe is equipped with a pressure relief pipe, and a pressure sensor, a pressure relief electric valve, and a one-way valve are sequentially installed on the pressure relief pipe. A pressure relief tank is connected to the pressure relief pipe. When the pressure sensor detects that the pressure reaches a specified value, the pressure relief electric valve opens, and the gas pushes open the one-way valve and enters the pressure relief tank.

[0006] Preferably, the pressure relief tank is provided with an air supply pipe, and the air supply pipe is provided with an electric air supply valve.

[0007] Preferably, the gas supply pipe is connected to a natural gas combustion torch.

[0008] Preferably, the pressure relief tank is equipped with a second pressure sensor.

[0009] Preferably, the air supply pipe is provided with an air outlet pipe, and the air outlet pipe is provided with an electric air outlet valve.

[0010] Preferably, when the pressure sensor detects that the pressure has reached a specified value, the gas supply electric valve is activated, natural gas is discharged into the natural gas combustion torch for combustion and consumption, and the gas supply electric valve and the gas outlet electric valve are opened to discharge the natural gas.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention uses a pressure relief tank to store the natural gas accumulated in the intake pipe, and ensures smooth and stable exhaust. The natural gas combustion torch is used to burn off any excess gas. The exhaust pipe facilitates the recovery of the natural gas from the pressure relief tank. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] In the diagram: 1. Compressor; 2. Inlet pipe; 3. Exhaust pipe; 4. Inlet electric valve; 5. Exhaust electric valve; 6. Pressure relief pipe; 7. Pressure sensor one; 8. Pressure relief electric valve; 9. Check valve; 10. Pressure relief tank; 11. Gas supply pipe; 12. Gas supply electric valve; 13. Natural gas combustion flare; 14. Pressure sensor two; 15. Gas outlet pipe; 16. Gas outlet electric valve. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 This utility model provides a technical solution: A protective device for pressurized extraction in shale gas fields, comprising: Compressor 1 is equipped with an inlet pipe 2 and an exhaust pipe 3. Compressor 1 is used to send the gas collected by the front-end mining equipment into compressor 1 through inlet pipe 2, pressurize it in compressor 1, and then discharge it through exhaust pipe 3 into storage equipment. Inlet pipe 2 is fixedly connected to compressor 1 through flange connection or other means, and exhaust pipe 3 is fixedly connected to compressor 1 through flange connection or other means.

[0016] An intake electric valve 4 is installed on the intake pipe 2. The intake electric valve 4 is fixedly connected to the intake pipe 2 through flange connection or other means. An exhaust electric valve 5 is installed on the exhaust pipe 3. The exhaust electric valve 5 is fixedly connected to the exhaust pipe 3 through flange connection or other means.

[0017] A pressure relief pipe 6 is provided on the intake pipe 2. The pressure relief pipe 6 is fixedly connected to the intake pipe 2 by welding or flange connection. A pressure sensor 7, a pressure relief electric valve 8, and a one-way valve 9 are sequentially arranged on the pressure relief pipe 6. The pressure sensor 7 is fixedly connected to the pressure relief pipe 6 by threaded connection and sealing gasket. The pressure relief electric valve 8 is fixedly connected to the pressure relief pipe 6 by flange connection. The one-way valve 9 is fixedly connected to the pressure relief pipe 6 by flange connection. A pressure relief tank 10 is connected to the pressure relief pipe 6 by welding or flange connection. When the pressure sensor 7 detects that the pressure reaches a specified value, the pressure relief electric valve 8 opens, and the gas pushes open the one-way valve 9 to enter the pressure relief tank 10. The specified value in this utility model can be reasonably selected according to the actual use. The specified value corresponding to the pressure sensor 14 is greater than the specified value corresponding to the pressure sensor 7.

[0018] The pressure relief tank 10 is equipped with an air supply pipe 11, which is fixedly connected to the pressure relief tank 10 by welding or flange connection, etc. An air supply electric valve 12 is installed on the air supply pipe 11, which is fixedly connected to the air supply pipe 11 by flange connection, etc.

[0019] The gas supply pipe 11 is connected to the natural gas combustion torch 13, and the gas supply pipe 11 is fixedly connected to the natural gas combustion torch 13 through flange connection or other means.

[0020] Pressure sensor 2 14 is installed on pressure relief tank 10. Pressure sensor 2 14 is fixedly connected to pressure relief tank 10 by means of threaded connection and sealing gasket.

[0021] An outlet pipe 15 is provided on the gas supply pipe 11. The outlet pipe 15 is fixedly connected to the gas supply pipe 11 by welding or flange connection. An outlet electric valve 16 is provided on the outlet pipe 15. The outlet electric valve 16 is fixedly connected to the outlet pipe 15 by flange connection.

[0022] This utility model can also be equipped with a microcontroller to control each electric valve. Pressure sensor 1 7, pressure relief electric valve 8, gas supply electric valve 12, natural gas combustion torch 13, pressure sensor 2 14, and gas outlet electric valve 16 are respectively connected to the microcontroller through data electrical signal communication.

[0023] Working principle: When compressor 1 fails, the intake electric valve 4 and the exhaust electric valve 5 are closed. When the pressure sensor detects that the pressure has reached the specified value, the pressure relief electric valve 8 is opened, and the gas pushes open the one-way valve 9 to enter the pressure relief tank 10. When the pressure sensor 14 detects that the pressure has reached the specified value, the gas supply electric valve 12 is started, and natural gas is discharged into the natural gas combustion torch 13 for combustion and consumption. The gas supply electric valve 12 and the gas outlet electric valve 16 are opened to discharge the natural gas, which facilitates the recovery of natural gas.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protection device for enhanced recovery of shale gas fields, characterized in that, include: A compressor, wherein the compressor is provided with an intake pipe and an exhaust pipe; An intake electric valve is installed on the intake pipe, and an exhaust electric valve is installed on the exhaust pipe. The intake pipe is equipped with a pressure relief pipe, and a pressure sensor, a pressure relief electric valve, and a one-way valve are sequentially installed on the pressure relief pipe. A pressure relief tank is connected to the pressure relief pipe. When the pressure sensor detects that the pressure reaches a specified value, the pressure relief electric valve opens, and the gas pushes open the one-way valve and enters the pressure relief tank.

2. The protection device for enhanced recovery of shale gas fields according to claim 1, characterized in that: The pressure relief tank is equipped with an air supply pipe, and the air supply pipe is equipped with an electric air supply valve.

3. The apparatus of claim 2, wherein: The gas supply pipe is connected to the natural gas combustion flare.

4. The apparatus of claim 3, wherein: The pressure relief tank is equipped with a pressure sensor 2.

5. The apparatus of claim 4, wherein: The air supply pipe is equipped with an air outlet pipe, and the air outlet pipe is equipped with an electric air outlet valve.

6. The apparatus of claim 5, wherein: When the pressure sensor detects that the pressure has reached the specified value, the gas supply electric valve is activated, and natural gas is discharged into the natural gas combustion torch for combustion and consumption. The gas supply electric valve and the gas outlet electric valve are then opened to discharge the natural gas.

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