CN112096353A - Vent and gas injection system - Google Patents

Abstract

The invention provides a venting device and a gas injection system. The venting device comprises: a first pipeline, a first throttle valve, a first pressure detection device, a first exhaust pipe and a second exhaust pipe; a first throttle valve The outlet of the first pipe is communicated with the inlet of the first pipe; the first pressure detection device is arranged on the first pipe; the outlet of the first pipe is communicated with the inlets of the first exhaust pipe and the second exhaust pipe, and the first exhaust pipe is provided with There is a first valve; a second valve is arranged on the second exhaust pipe. When overhauling the compressor, part of the natural gas remaining in the compressor can be recovered through the first exhaust pipe to the gas supply system for the compressed gas, and then the remaining natural gas can be released through the venting torch to be combined with all the natural gas in the compressor. Compared with the residual natural gas released through the venting flare, part of the natural gas is recovered, thereby reducing the waste of natural gas.

Description

Vent and gas injection system

technical field

The invention designs oil exploitation equipment technology, and in particular relates to a venting device and a gas injection system.

Background technique

Oil is generally stored in underground oil reservoirs, and the distance between the oil reservoirs and the ground is relatively large, so well pipes extending to the oil reservoirs are often installed on the ground, casings are drilled in the well pipes, and oil pipes are set inside the casings. The bottom ends of the tubing and the casing both extend to and communicate with the oil reservoir; during production, the oil in the reservoir is extracted through the tubing, but the distance between the reservoir and the ground is large, making it difficult to extract oil.

In the prior art, natural gas is often injected into the oil storage layer through a gas injection system, and driven by the natural gas, the oil in the oil storage is driven to flow to the ground along the oil pipe, and the difficulty of exploitation is reduced; Gas injection pipeline, vent pipeline, vent valve and control valve, the outlet of the compressor is connected to the casing through the gas injection pipeline, the control valve is set on the gas injection pipeline, the outlet of the compressor is also connected to the venting torch through the vent pipeline, and the vent valve Set on the vent pipe. During gas injection, the vent valve is closed, the control valve is opened, and the compressor transports the natural gas between the casing and the oil pipe through the gas injection pipeline, and then transports it to the oil reservoir; when the compressor needs to be repaired, close the compressor and the main control valve, open the vent valve, and then the natural gas in the compressor is transported to the venting torch through the venting pipeline, and after the venting torch is burned, it is discharged into the atmosphere.

However, when the compressor is overhauled, all the natural gas in the compressor is discharged to the venting flare, resulting in wasted energy.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a venting device and a gas injection system to solve the technical problem of wasting energy by discharging all the natural gas in the compressor to the venting flare when the compressor is overhauled.

An embodiment of the present invention provides a venting device, comprising: a first pipeline, a first throttle valve, a first pressure detection device, a first exhaust pipe and a second exhaust pipe; an inlet of the first throttle valve is used for In communication with the outlet of the compressor, the outlet of the first throttle valve is in communication with the inlet of the first pipeline; the first pressure detection device is arranged on the first pipeline to detect the first pipeline The air pressure inside; the outlet of the first pipe is communicated with the inlets of the first exhaust pipe and the second exhaust pipe, and the outlet of the first exhaust pipe is used to communicate with the inlet of the compressor , the first exhaust pipe is provided with a first valve; the outlet of the second exhaust pipe is used to communicate with the venting torch, and the second exhaust pipe is provided with a second valve.

The venting device as described above, preferably, the venting device further comprises a third exhaust pipe and a third valve; the inlet of the third exhaust pipe is communicated with the outlet of the first pipe, and the third row The outlet of the gas pipe is used for communicating with the fuel pipe, and the third valve is arranged on the third exhaust pipe.

In the above-mentioned venting device, preferably, a first check valve is provided on the first exhaust pipe between the first valve and the compressor inlet, and the first check valve only allows gas A third one-way valve is arranged on the third exhaust pipe between the third valve and the fuel pipe inlet, and the third one-way valve only allows gas to flow to the inlet of the compressor; the inlet of the fuel pipe.

The venting device as described above, preferably, the venting device further comprises: a flow meter, a first maintenance valve and a second maintenance valve; the first maintenance valve and the second maintenance valve are both arranged on the first maintenance valve. The pipeline is arranged at intervals along the extending direction of the first pipeline; the flowmeter is arranged on the first pipeline and is located between the first maintenance valve and the second maintenance valve, the The flow meter is used to detect the flow rate of the gas in the first pipeline.

The venting device as described above, preferably, the venting device further comprises an exhaust valve, the inlet of the exhaust valve is communicated with the first pipeline between the first maintenance valve and the second maintenance valve, so The outlet of the exhaust valve is used to communicate with the atmosphere.

In the above-mentioned venting device, preferably, the venting device further includes a temperature detecting device, and the temperature detecting device is arranged on the first pipeline and used to detect the temperature of the gas in the first pipeline.

In the above venting device, preferably, the venting device further comprises a safety valve, the inlet of the safety valve is communicated with the inlet of the first exhaust pipe, and the outlet of the safety valve is used to communicate with the atmosphere.

The venting device as described above, preferably, the venting device further comprises a fourth valve and a fifth valve; the inlet of the safety valve is communicated with the inlet of the first exhaust pipe through the fourth valve, and the The inlet of the safety valve is also communicated with the outlet of the second valve through the fifth valve.

The venting device as described above, preferably, the venting device further comprises: a second throttle valve, a second pipeline and a second pressure detection device; the inlet of the second throttle valve is used for connecting with the compressor. The outlet is communicated with the outlet, the outlet of the second throttle valve is communicated with the inlet of the second pipe, and the outlet of the second pipe is communicated with the inlets of the first exhaust pipe and the second exhaust pipe; so The second pressure detection device is arranged on the second pipeline to detect the air pressure in the second pipeline.

An embodiment of the present invention further provides a gas injection system, comprising: a compressor, a gas injection pipeline and the above-mentioned venting device, the outlet of the compressor is communicated with the annular space through the gas injection pipeline, and the compressor The outlet is also in communication with the first throttle inlet in the vent.

In the venting device and the gas injection system provided by the embodiments of the present invention, the inlet of the first throttle valve is communicated with the outlet of the compressor, the outlet of the first throttle valve is communicated with the inlet of the first pipeline, and the outlet of the first pipeline is connected with the outlet of the compressor. The inlet of the first exhaust pipe is communicated with the inlet of the second exhaust pipe, a first valve is arranged on the first exhaust pipe, and a second valve is arranged on the second exhaust pipe; the outlet of the first exhaust pipe is communicated with the inlet of the compressor , the outlet of the second exhaust pipe is connected to the venting torch; when the compressor is overhauled, part of the natural gas remaining in the compressor can be recovered through the first exhaust pipe to the gas supply system for compressed gas supply, and then The remaining natural gas is then released through the venting flare. Compared with all the residual natural gas in the compressor being released through the venting flare, part of the natural gas is recovered, thereby reducing the waste of natural gas.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic structural diagram 1 of a venting device provided in an embodiment of the present invention;

FIG. 2 is a second structural schematic diagram of a venting device provided by an embodiment of the present invention;

3 is a schematic structural diagram three of a venting device provided in an embodiment of the present invention;

4 is a schematic diagram 4 of the structure of the venting device provided by the embodiment of the present invention;

FIG. 5 is a schematic diagram of the connection between the venting device and the compressor provided by the embodiment of the present invention.

Description of reference numbers:

10: the first pipeline;

101: the first throttle valve;

102: a first pressure detection device;

103: flowmeter;

104: the first maintenance valve;

105: the second maintenance valve;

106: exhaust valve;

107: temperature detection device;

20: the first exhaust pipe;

201: the first valve;

202: the first one-way valve;

30: the second exhaust pipe;

301: the second valve;

302: vent the torch;

40: the third exhaust pipe;

401: the third valve;

402: the third one-way valve;

403: fuel pipe;

50: safety valve;

501: the fourth valve;

502: the fifth valve;

60: the second pipeline;

601: the second throttle valve;

602: a second pressure detection device;

70: compressor;

701: gas injection pipeline;

702: gas injection valve;

80: the third pipeline;

801: the sixth valve;

90: Annulus.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The embodiments described below and features in the embodiments may be combined with each other without conflict.

In the present invention, unless otherwise expressly specified, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integrally formed, it can be mechanically connected, it can be electrical connection or can communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication between two components or the interaction relationship between the two components, unless There are other clear restrictions. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Fig. 1 is a schematic structural diagram 1 of a venting device provided by an embodiment of the present invention; Fig. 2 is a schematic structural diagram 2 of a venting device provided by an embodiment of the present invention; Fig. 3 is a schematic structural diagram 3 of a venting device provided by an embodiment of the present invention; FIG. 5 is a schematic diagram of the connection between the venting device and the compressor provided by the embodiment of the present invention.

Please refer to Figure 1-Figure 5. This embodiment provides a venting device, including: a first pipeline 10 , a first throttle valve 101 , a first pressure detection device 102 , a first exhaust pipe 20 and a second exhaust pipe 30 ; a first throttle valve 101 The inlet of the compressor 70 is used to communicate with the outlet of the compressor 70, and the outlet of the first throttle valve 101 is communicated with the inlet of the first pipeline 10; the first pressure detection device 102 is arranged on the first pipeline 10 to detect the inner the air pressure; the outlet of the first pipe 10 is communicated with the inlets of the first exhaust pipe 20 and the second exhaust pipe 30, the outlet of the first exhaust pipe 20 is used to communicate with the inlet of the compressor 70, and the first exhaust pipe 20 is provided with a first valve 201 ; the outlet of the second exhaust pipe 30 is used to communicate with the venting torch 302 , and a second valve 301 is provided on the second exhaust pipe 30 .

In this embodiment, the first throttle valve 101 is used to throttle and decompress the gas flowing from the outlet of the compressor 70 to the first exhaust pipe 20 and the second exhaust pipe 30, so as to reduce the flow of gas into the first exhaust pipe The gas pressure of the pipe 20 or the second exhaust pipe 30. Specifically, by adjusting the first throttle valve 101, the outlet pressure of the first throttle valve 101 can be controlled; for example, the first throttle valve 101 can be an angle-type throttle valve, and the angle-type throttle valve can include a valve The valve body is provided with a throttle channel, one end of the throttle channel is communicated with the outlet of the compressor 70, and the other end of the throttle channel is connected with the inlets of the first exhaust pipe 20 and the second exhaust pipe 30 The valve body is also provided with a threaded hole that penetrates into the throttling channel, and the valve stem is provided with an external thread matched with the threaded hole. Twisting the valve stem can make the valve stem enter into the throttling channel, or to the outside of the throttling channel. Move, and then adjust the cross-sectional area of the throttle passage to change the outlet pressure of the first throttle valve 101 . Of course, the first throttle valve 101 in this embodiment may also have other structures, as long as it is ensured that the first throttle valve 101 can adjust the gas pressure entering the first pipeline 10 and the second pipeline 60 .

The compressor 70 in this embodiment is used to inject natural gas into the annulus 90 between the oil pipe and the casing. The outlet of the compressor 70 is also communicated with the annulus 90 between the oil pipe and the casing through the gas injection pipeline 701. Note A gas injection valve 702 is provided on the gas pipeline 701 , and the gas injection valve 702 is used to control the on-off of the gas injection pipeline 701 . The compressor 70 in this embodiment can be a multi-stage compressor 70, so as to inject high-pressure gas into the annulus 90 between the oil pipe and the casing, and the gas flows into the oil reservoir through the annulus 90 between the oil pipe and the casing , to drive the oil to flow out through the tubing.

In this embodiment, the first valve 201 provided on the first exhaust pipe 20 is used to control the on-off of the first exhaust pipe 20 . Similarly, the second valve 301 provided on the second exhaust pipe 30 , used to control the on-off of the second exhaust pipe 30 . Preferably, the second valve 301 can be a shut-off vent valve, which can throttle and depressurize the natural gas flowing into the venting torch 302 to prevent the natural gas flowing into the venting torch 302 from being over-high pressured.

In this embodiment, the outlet of the second exhaust pipe 30 is communicated with a venting torch 302; wherein the venting torch 302 is used for igniting the natural gas to burn it in the atmosphere, so as to discharge the natural gas. The outlet of the first exhaust pipe 20 is communicated with the inlet of the compressor 70 , and the outlet of the first exhaust pipe 20 can be communicated with the gas supply system for supplying air to the compressor 70 , so as to remove the natural gas remaining in the compressor 70 Return to the air supply system.

In this embodiment, the first pressure detection device 102 disposed on the first pipeline 10 can be of various types, as long as the pressure of the natural gas in the first pipeline 10 can be detected. For example, the first pressure detection device 102 may be a pressure gauge disposed on the first pipeline 10 , and the pressure of the natural gas on the first pipeline 10 may be directly obtained through the pressure gauge. Of course, the first pressure detection device 102 may also include an air pressure sensor, and the air pressure sensor can convert the air pressure signal in the first pipeline 10 into an electrical signal, and the control device such as a single chip microcomputer, a programmable logic controller, etc. After signal processing, the natural gas pressure in the first pipeline 10 can be obtained.

The use process of the venting device provided in this embodiment is as follows: when the compressor 70 is working normally, the first throttle valve 101 is closed, and the compressor 70 injects natural gas into the oil reservoir through the gas injection pipeline 701; of course, the compressor 70 needs to be repaired , close the compressor 70 and the gas injection valve 702 on the gas injection pipeline 701; then slowly open the first throttle valve 101, and obtain the gas pressure in the first pipeline 10 through the first pressure detection device 102. When the gas pressure in the 10 is slightly higher than the inlet pressure of the compressor 70, the first valve 201 is opened, and the natural gas enters the inlet of the compressor 70 through the first exhaust pipe 20 to realize the recovery of natural gas; When the pressure is equal to the inlet pressure of the compressor 70, the first valve 201 is closed, and the second valve 301 is opened, so that the natural gas flows into the venting torch 302 through the second exhaust pipe 30, and the remaining natural gas is released by burning After the natural gas remaining in the compressor 70 is completely released, the compressor 70 can be repaired.

In the venting device provided in this embodiment, the inlet of the first throttle valve 101 is communicated with the outlet of the compressor 70, the outlet of the first throttle valve 101 is communicated with the inlet of the first pipe 10, and the outlet of the first pipe 10 is connected with the outlet of the compressor 70. The inlets of the first exhaust pipe 20 and the second exhaust pipe 30 communicate with each other. The first exhaust pipe 20 is provided with a first valve 201, and the second exhaust pipe 30 is provided with a second valve 301; The outlet is communicated with the inlet of the compressor 70, and the outlet of the second exhaust pipe 30 is communicated with the venting torch 302; when overhauling the compressor 70, part of the natural gas remaining in the compressor 70 can be removed first through the first exhaust pipe 20 It is recovered into the gas supply system for compressed gas supply, and then the remaining natural gas is released through the venting torch 302. Compared with all the residual natural gas in the compressor 70 being released through the venting torch 302, part of the natural gas is recovered, thereby reducing the amount of natural gas. waste.

In this embodiment, the venting device further includes a third exhaust pipe 40 and a third valve 401; the inlet of the third exhaust pipe 40 is communicated with the outlet of the first pipe 10, and the outlet of the third exhaust pipe 40 is used for connecting with the fuel The pipes 403 communicate with each other, and the third valve 401 is provided on the third exhaust pipe 40 . The fuel pipe 403 can be a pipeline for supplying fuel gas to a plant area such as a combined station, or a civil natural gas pipeline; and the gas pressure in the fuel pipe 403 is lower than the inlet pressure of the compressor 70 and higher than the gas pressure of the venting torch 302 . In this way, after part of the natural gas remaining in the compressor 70 is recovered to the gas supply system through the first exhaust pipe 20 , part of the natural gas in the compressor 70 is transported to the fuel pipe 403 through the third pipe 80 for further Recover the natural gas remaining in the compressor 70; when the pressure of the first pressure detection device 102 is equal to the gas pressure in the fuel pipe 403, close the third valve 401, open the second valve 301, and release the remaining natural gas through the venting torch 302 .

In this embodiment, a first check valve 202 is provided on the first exhaust pipe 20 between the first valve 201 and the inlet of the compressor 70, and the first check valve 202 only allows gas to flow to the inlet of the compressor 70; A third check valve 402 is provided on the third exhaust pipe 40 between the three valves 401 and the inlet of the fuel pipe 403 , and the third check valve 402 only allows gas to flow to the inlet of the fuel pipe 403 . This arrangement can prevent the natural gas from being poured back into the compressor 70 . Specifically, the first check valve 202 can prevent the natural gas in the gas supply system from entering the compressor 70 , and the third check valve 402 can prevent the natural gas in the fuel pipe 403 from entering the compressor 70 .

In this embodiment, the venting device further includes: a flow meter 103, a first maintenance valve 104, and a second maintenance valve 105; The arrangement of the interval in the extension direction of the pipeline 10; the flowmeter 103 is arranged on the first pipeline 10 and is located between the first maintenance valve 104 and the second maintenance valve 105, and the flowmeter 103 is used to detect the flow rate of the gas in the first pipeline 10 . The flow rate of the gas flowing through the first pipeline 10 can be obtained by the flow meter 103, so as to obtain the volume of the natural gas.

Wherein, the first maintenance valve 104 and the second maintenance valve 105 are used to cut off the gas source at both ends of the flow meter 103 when the flow meter 103 is overhauled, so as to avoid natural gas leakage.

Further, the venting device provided in this example further includes an exhaust valve 106, the inlet of the exhaust valve 106 is communicated with the first pipeline 10 between the first maintenance valve 104 and the second maintenance valve 105, and the outlet of the exhaust valve 106 is in communication with the atmosphere. When the flow meter 103 is repaired, the natural gas in the first pipeline 10 between the first maintenance valve 104 and the second maintenance valve 105 can be released through the exhaust valve 106 .

Specifically, when the flowmeter 103 is repaired, the first maintenance valve 104 and the second maintenance valve 105 are first closed, and then the exhaust valve 106 is opened, and the first maintenance valve 104 and the second maintenance valve 105 are closed. The natural gas in the pipeline 10 is discharged, and then the flow meter 103 can be repaired.

In this embodiment, the venting device further includes a temperature detection device 107 . The temperature detection device 107 is disposed on the first pipeline 10 and is used to detect the temperature of the gas in the first pipeline 10 . The temperature of the natural gas in the first pipeline 10 can be detected by the temperature detection device 107, so as to prevent the temperature of the natural gas from being too high and affecting subsequent equipment work.

Specifically, the temperature detection device 107 may include a temperature sensor, and the temperature signal of the natural gas is converted into an electrical signal by the temperature sensor, and the control device obtains the electrical signal to realize temperature detection. Of course, the temperature detection device 107 may also be a device capable of detecting temperature, such as a thermometer.

In this embodiment, the venting device further includes a safety valve 50, the inlet of the safety valve 50 is communicated with the inlet of the first exhaust pipe 20, and the outlet of the safety valve 50 is used for communication with the atmosphere. The natural gas in the first pipeline 10 can be directly discharged into the atmosphere through the safety valve 50 .

In this embodiment, preferably, the safety valve 50 may be an overflow valve, so that when the gas pressure in the first pipeline 10 is higher than a preset value, the overflow valve is automatically opened to discharge the rest of the first pipeline 10 to the atmosphere , when the gas pressure in the first pipeline 10 is lower than the preset pressure value, the overflow valve is automatically closed. Of course, the safety valve 50 may also be a ball valve, a gate valve, or the like.

Specifically, the venting device further includes a fourth valve 501 and a fifth valve 502; the inlet of the safety valve 50 is communicated with the inlet of the first exhaust pipe 20 through the fourth valve 501, and the inlet of the safety valve 50 is also connected to the inlet of the first exhaust pipe 20 through the fifth valve 502. The outlet of the second valve 301 is communicated. The fourth valve 501 can prevent the first pipeline 10 from supplying gas to the safety valve 50, thereby facilitating the maintenance of the safety valve 50; in addition, the natural gas in the venting torch 302 can also be released into the atmosphere through the fifth valve 502 and the safety valve 50 .

The working process of the venting device provided in this embodiment is as follows: when the compressor 70 is working normally, the first throttle valve 101 is closed, and the compressor 70 injects natural gas into the oil storage layer through the gas injection pipeline 701; when the compressor 70 needs to be repaired , close the compressor 70 and the gas injection valve 702 on the gas injection pipeline 701; then slowly open the first throttle valve 101, and obtain the gas pressure in the first pipeline 10 through the first pressure detection device 102. When the gas pressure in the 10 is slightly higher than the inlet pressure of the compressor 70, the first valve 201 is opened, and the natural gas enters the inlet of the compressor 70 through the first exhaust pipe 20 to realize the recovery of natural gas; When the pressure is equal to the inlet pressure of the compressor 70, close the first valve 201 and open the third valve 401, so that the natural gas in the compressor 70 flows into the fuel pipe 403 through the third pipeline 80 to further recover the gas in the compressor 70. Natural gas; when the pressure of the natural gas in the first pipeline 10 is reduced to be equal to the air pressure in the fuel pipe 403, close the third valve 401 and open the second valve 301, so that the natural gas flows into the venting torch through the second exhaust pipe 30 In 302, the remaining natural gas is released by burning, and after the natural gas remaining in the compressor 70 is completely released, the compressor 70 can be repaired.

In this embodiment, the venting device further includes: a second throttle valve 601, a second pipeline 60 and a second pressure detection device 602; the inlet of the second throttle valve 601 is used to communicate with the outlet of the compressor 70, and the second section The outlet of the flow valve 601 is communicated with the inlet of the second pipe 60, and the outlet of the second pipe 60 is communicated with the inlets of the first exhaust pipe 20 and the second exhaust pipe 30; the second pressure detection device 602 is arranged in the second pipe 60 to detect the air pressure in the second pipe 60 . When the first throttle valve 101 or the first pipeline 10 or each device on the first pipeline 10 fails, the first throttle valve 101 or the first maintenance valve 104 and the second maintenance valve 105 can be closed to prevent the The natural gas flows in the first pipe 10; at this time, the natural gas is delivered to the first exhaust pipe 20, the second exhaust pipe 30 and the third exhaust pipe 40 through the second throttle valve 601 and the second pipe 60 to avoid The venting device stops working.

Specifically, the second throttle valve 601 and the first throttle valve 101 may be the same, and the second pressure detection device 602 and the first pressure detection device 102 may also be the same.

Preferably, the temperature detection device 107 , the flow meter 103 , the first maintenance valve 104 and the second maintenance valve 105 can also be set on the second pipeline 60 , and the specific setting positions and connection methods are generally the same as those of the first pipeline 10 , here No longer.

In this embodiment, a third pipeline 80 is provided between the gas injection pipeline 701 between the gas injection valve 702 and the annulus 90 and the inlets of the first throttle valve 101 and the second throttle valve 601 , and the third pipeline 80 is provided The sixth valve 801 is used to open the sixth valve 801 to recover and discharge the natural gas when the natural gas in the annulus 90 between the oil pipe and the casing needs to be released.

It should be noted that in this embodiment, the first valve 201 , the second valve 301 , the third valve 401 , the fourth valve 501 , the fifth valve 502 , the sixth valve 801 , the first maintenance valve 104 , and the second maintenance valve 105 and the gas injection valve can be a ball valve, a gate valve, etc., which can control the on-off of the pipeline where each valve is located.

Continue to refer to Figures 1-5. In other embodiments, a gas injection system is also provided, comprising: a compressor 70, a gas injection pipeline 701 and the above-mentioned venting device, the outlet of the compressor 70 is communicated with the annular space 90 through the gas injection pipeline 701, and the compressor The outlet of 70 also communicates with the inlet of the first throttle valve 101 in the venting device.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

It should be noted that, in the description of the present invention, the terms "first" and "second" are only used to facilitate the description of different components, and should not be construed as indicating or implying a sequence relationship, relative importance, or implicitly indicating indicated the number of technical characteristics. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. A venting device, characterized in that it comprises: a first pipeline, a first throttle valve, a first pressure detection device, a first exhaust pipe and a second exhaust pipe; an inlet of the first throttle valve For communicating with the outlet of the compressor, the outlet of the first throttle valve communicates with the inlet of the first pipeline; the first pressure detection device is arranged on the first pipeline to detect the first air pressure in the pipe; The outlet of the first pipe is communicated with the inlets of the first exhaust pipe and the second exhaust pipe, the outlet of the first exhaust pipe is used for communication with the inlet of the compressor, and the first exhaust pipe is connected to the inlet of the compressor. An exhaust pipe is provided with a first valve; the outlet of the second exhaust pipe is used to communicate with the venting torch, and a second valve is provided on the second exhaust pipe. 2 . The venting device according to claim 1 , wherein the venting device further comprises a third exhaust pipe and a third valve; the inlet of the third exhaust pipe is communicated with the outlet of the first pipe. 3 . , the outlet of the third exhaust pipe is used for communicating with the fuel pipe, and the third valve is arranged on the third exhaust pipe. 3. The venting device according to claim 2, wherein a first check valve is provided on the first exhaust pipe between the first valve and the compressor inlet, and the first The one-way valve only allows gas to flow to the inlet of the compressor; a third one-way valve is arranged on the third exhaust pipe between the third valve and the inlet of the fuel pipe, and the third one-way valve The valve only allows gas to flow to the inlet of the fuel line. 4. The venting device according to claim 1, wherein the venting device further comprises: a flow meter, a first maintenance valve and a second maintenance valve; The first maintenance valve and the second maintenance valve are both arranged on the first pipeline and are arranged at intervals along the extending direction of the first pipeline; the flowmeter is arranged on the first pipeline, and located between the first maintenance valve and the second maintenance valve, the flow meter is used for detecting the flow rate of the gas in the first pipeline. 5 . The venting device according to claim 4 , wherein the venting device further comprises an exhaust valve, the inlet of the exhaust valve and the gap between the first maintenance valve and the second maintenance valve. 6 . The first pipe is in communication, and the outlet of the exhaust valve is used for communication with the atmosphere. 6. The venting device according to claim 1, characterized in that, the venting device further comprises a temperature detection device, and the temperature detection device is arranged on the first pipeline for detecting the gas in the first pipeline temperature. 7. The venting device according to claim 1, wherein the venting device further comprises a safety valve, the inlet of the safety valve is communicated with the inlet of the first exhaust pipe, and the outlet of the safety valve is in communication with the atmosphere. 8 . The venting device according to claim 7 , wherein the venting device further comprises a fourth valve and a fifth valve; the inlet of the safety valve passes through the fourth valve and the first exhaust pipe. 9 . The inlet of the safety valve is communicated with the outlet of the second valve through the fifth valve. 9 . The venting device according to claim 1 , wherein the venting device further comprises: a second throttle valve, a second pipeline and a second pressure detection device; The inlet is used to communicate with the outlet of the compressor, the outlet of the second throttle valve is communicated with the inlet of the second pipe, and the outlet of the second pipe is communicated with the first exhaust pipe and the first exhaust pipe and the second pipe. The inlets of the two exhaust pipes are connected; the second pressure detection device is arranged on the second pipe to detect the air pressure in the second pipe. 10. A gas injection system, characterized by comprising: a compressor, a gas injection pipeline and the venting device according to any one of claims 1-9, wherein the outlet of the compressor is connected to the annular space through the gas injection pipeline The outlet of the compressor is also in communication with the inlet of the first throttle valve in the blowdown device.

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