CN211008593U - Emptying device and gas injection system - Google Patents
Emptying device and gas injection system Download PDFInfo
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- CN211008593U CN211008593U CN201920906830.9U CN201920906830U CN211008593U CN 211008593 U CN211008593 U CN 211008593U CN 201920906830 U CN201920906830 U CN 201920906830U CN 211008593 U CN211008593 U CN 211008593U
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- 238000002347 injection Methods 0.000 title claims abstract description 37
- 239000007924 injection Substances 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 238000012423 maintenance Methods 0.000 claims description 33
- 238000013022 venting Methods 0.000 claims description 18
- 239000000446 fuel Substances 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 130
- 239000003345 natural gas Substances 0.000 abstract description 67
- 239000007789 gas Substances 0.000 abstract description 61
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides an emptying device and gas injection system, this emptying device includes: the first pipeline, the first throttle valve, the first pressure detection device, the first exhaust pipe and the second exhaust pipe; the outlet of the first throttling valve is communicated with the inlet of the first pipeline; the first pressure detection device is arranged on the first pipeline; an outlet of the first pipeline is communicated with inlets of a first exhaust pipe and a second exhaust pipe, and a first valve is arranged on the first exhaust pipe; and a second valve is arranged on the second exhaust pipe. When overhauing the compressor, can retrieve the natural gas that part remained in the compressor to the air supply system for the compression air feed through first blast pipe earlier in, later rethread evacuation torch releases surplus natural gas, all drops through the flare release with all residual natural gases in the compressor and compares, has retrieved partial natural gas, and then has reduced the waste of natural gas.
Description
Technical Field
The utility model relates to an oil development equipment technique especially relates to an emptying device and gas injection system.
Background
Generally, petroleum is stored in an underground oil storage layer, and the distance between the oil storage layer and the ground is large, so a well pipe extending to the oil storage layer is usually arranged on the ground, a sleeve is arranged in the well pipe in a penetrating manner, an oil pipe is arranged in the sleeve, and the oil pipe and the bottom end of the sleeve both extend to the oil storage layer and are communicated with the oil storage layer; during exploitation, oil in the oil storage layer is extracted through the oil pipe, however, the distance between the oil storage layer and the ground is large, and the difficulty in extracting the oil is large.
In the prior art, natural gas is usually injected into an oil storage layer through a gas injection system, and oil in the oil storage layer is driven to flow to the ground along an oil pipe under the drive of the natural gas, so that the exploitation difficulty is reduced; specifically, the gas injection system includes: the gas injection pipeline and the sleeve are communicated with the outlet of the compressor, the control valve is arranged on the gas injection pipeline, the outlet of the compressor is communicated with the air-blowing torch through the air-blowing pipeline, and the air-blowing valve is arranged on the air-blowing pipeline. When gas is injected, the emptying valve is closed, the control valve is opened, and the compressor conveys natural gas to a position between the sleeve and the oil pipe through the gas injection pipeline and further conveys the natural gas to the oil storage layer; when the compressor needs to be overhauled, the compressor and the main control valve are closed, the emptying valve is opened, and then natural gas in the compressor is conveyed to the emptying torch through the emptying pipeline, and is discharged into the atmosphere after the emptying torch burns.
However, when the compressor is overhauled, the natural gas in the compressor is entirely discharged to the flare, resulting in energy waste.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a venting device and gas injection system to the solution is when overhauing the compressor, discharges the whole technical problem to the unloading torch of discharging of the natural gas in the compressor, leads to the energy extravagant.
The embodiment of the utility model provides an emptying device, include: the first pipeline, the first throttle valve, the first pressure detection device, the first exhaust pipe and the second exhaust pipe; the inlet of the first throttling valve is used for being communicated with the outlet of the compressor, and the outlet of the first throttling valve is communicated with the inlet of the first pipeline; the first pressure detection device is arranged on the first pipeline to detect the air pressure in the first pipeline; an outlet of the first pipeline is communicated with inlets of the first exhaust pipe and the second exhaust pipe, an outlet of the first exhaust pipe is used for being communicated with an inlet of the compressor, and a first valve is arranged on the first exhaust pipe; and the outlet of the second exhaust pipe is communicated with the emptying torch, and a second valve is arranged on the second exhaust pipe.
The vent device as described above, preferably, the vent device further comprises a third exhaust pipe and a third valve; an inlet of the third exhaust pipe is communicated with an outlet of the first pipeline, an outlet of the third exhaust pipe is used for being communicated with a fuel pipe, and the third valve is arranged on the third exhaust pipe.
The air release device as described above, preferably, a first check valve is disposed on the first exhaust pipe between the first valve and the compressor inlet, and the first check valve only allows gas to flow to the compressor inlet; and 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 only allows gas to flow to the inlet of the fuel pipe.
The emptying device as described above, preferably, the emptying device further comprises: the flow meter, the first maintenance valve and the second maintenance valve; the first maintenance valve and the second maintenance valve are 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, and the flowmeter is used for detecting the flow of gas in the first pipeline.
The emptying device as described above preferably further comprises an exhaust valve, an inlet of the exhaust valve is communicated with the first pipeline between the first maintenance valve and the second maintenance valve, and an outlet of the exhaust valve is used for being communicated with the atmosphere.
The emptying device as described above preferably further comprises a temperature detecting device disposed on the first pipeline for detecting the temperature of the gas in the first pipeline.
The vent device as described above, preferably, the vent device further comprises a safety valve, an inlet of the safety valve is communicated with an inlet of the first exhaust pipe, and an outlet of the safety valve is used for communicating with the atmosphere.
The vent device as described above, preferably, the vent 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 inlet of the safety valve is also communicated with the outlet of the second valve through the fifth valve.
The emptying device as described above, preferably, the emptying device further comprises: the second throttle valve and the second pipeline are provided with a second pressure detection device; the inlet of the second throttling valve is used for being communicated with the outlet of the compressor, the outlet of the second throttling valve is communicated with the inlet of the second pipeline, and the outlet of the second pipeline is communicated with the inlets of the first exhaust pipe and the second exhaust pipe; the second pressure detection device is arranged on the second pipeline to detect the air pressure in the second pipeline.
The embodiment of the utility model provides a still provide a gas injection system, include: the air injection device comprises a compressor, an air injection pipeline and the emptying device, wherein an outlet of the compressor is communicated with an annular space through the air injection pipeline, and an outlet of the compressor is also communicated with the first throttling valve inlet in the emptying device.
The embodiment of the utility model provides an emptying device and gas injection system, through making the entry of first choke valve and the export of compressor communicate, the export of first choke valve and the entry of first pipeline communicate, the export of first pipeline and the entry of first blast pipe and second blast pipe communicate, set up the first valve on the first blast pipe, set up the second valve on the second blast pipe; the outlet of the first exhaust pipe is communicated with the inlet of the compressor, and the outlet of the second exhaust pipe is communicated with the emptying torch; when overhauing the compressor, can retrieve the natural gas that part remained in the compressor to the air supply system for the compression air feed through first blast pipe earlier in, later rethread evacuation torch releases surplus natural gas, all drops through the flare release with all residual natural gases in the compressor and compares, has retrieved partial natural gas, and then has reduced the waste of natural gas.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first schematic structural diagram of a emptying device provided by an embodiment of the present invention;
FIG. 2 is a schematic structural diagram II of a venting device provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram three of a venting device provided in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a venting device according to an embodiment of the present invention;
fig. 5 is a schematic view of a connection between a venting device and a compressor according to an embodiment of the present invention.
Description of reference numerals:
10: a first conduit;
101: a first throttle valve;
102: a first pressure detection device;
103: a flow meter;
104: a first maintenance valve;
105: repairing the valve in a second dimension;
106: an exhaust valve;
107: a temperature detection device;
20: a first exhaust pipe;
201: a first valve;
202: a first check valve;
30: a second exhaust pipe;
301: a second valve;
302: discharging a torch;
40: a third exhaust pipe;
401: a third valve;
402: a third check valve;
403: a fuel tube;
50: a safety valve;
501: a fourth valve;
502: a fifth valve;
60: a second conduit;
601: a second throttle valve;
602: a second pressure detecting device;
70: a compressor;
701: a gas injection pipe;
702: a gas injection valve;
80: a third pipeline;
801: a sixth valve;
90: an annulus.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
In the present invention, unless explicitly stated otherwise, the terms "mounting," "connecting," "fixing," and the like are to be understood in a broad sense, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Fig. 1 is a first schematic structural diagram of a emptying device provided by an embodiment of the present invention; FIG. 2 is a schematic structural diagram II of a venting device provided in an embodiment of the present invention; fig. 3 is a schematic structural diagram three of a venting device provided in the embodiment of the present invention; fig. 4 is a schematic structural diagram of a venting device according to an embodiment of the present invention; fig. 5 is a schematic view of a connection between a venting device and a compressor according to an embodiment of the present invention.
Please refer to fig. 1-5. This embodiment provides a venting device, includes: a first duct 10, a first throttle valve 101, a first pressure detection device 102, a first exhaust pipe 20, and a second exhaust pipe 30; the inlet of the first throttle valve 101 is used for communicating 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; a first pressure detecting device 102 is provided on the first pipe 10 to detect the air pressure inside the first pipe 10; an outlet of the first pipeline 10 is communicated with inlets of a first exhaust pipe 20 and a second exhaust pipe 30, an outlet of the first exhaust pipe 20 is used for being communicated with an inlet of the compressor 70, and a first valve 201 is arranged on the first exhaust pipe 20; the outlet of the second exhaust pipe 30 is used for communicating with a flare 302, and a second valve 301 is arranged on the second exhaust pipe 30.
In the present embodiment, the first throttle valve 101 is used to throttle and reduce the pressure of 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 pressure of the gas flowing into the first exhaust 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 may be an angle throttle valve, the angle throttle valve may include a valve body and a valve rod, a throttle passage is provided on the valve body, one end of the throttle passage communicates with an outlet of the compressor 70, the other end of the throttle passage communicates with inlets of the first exhaust pipe 20 and the second exhaust pipe 30, a threaded hole penetrating through the throttle passage is further provided on the valve body, an external thread matched with the threaded hole is provided on the valve rod, and the valve rod may be twisted to enable the valve rod to enter the throttle passage or move to the outside of the throttle passage, so as to adjust the cross-sectional area of the throttle passage, thereby changing the outlet pressure of the first throttle valve 101. Of course, the first throttle valve 101 in this embodiment may have other structures as long as it is ensured that the first throttle valve 101 can adjust the pressure of the gas entering the first pipeline 10 and the second pipeline 60.
The compressor 70 in this embodiment is used for injecting natural gas into the annulus 90 between the oil pipe and the casing, the outlet of the compressor 70 is further communicated with the annulus 90 between the oil pipe and the casing through a gas injection pipeline 701, a gas injection valve 702 is arranged on the gas injection pipeline 701, and the gas injection valve 702 is used for controlling the on-off of the gas injection pipeline 701. The compressor 70 in this embodiment may be a multi-stage compressor 70, so that high pressure gas is injected into the annulus 90 between the tubing and the casing, and the gas flows into the reservoir through the annulus 90 between the tubing and the casing to drive the oil to flow out through the tubing.
In this embodiment, the first valve 201 disposed on the first exhaust pipe 20 is used to control the on/off of the first exhaust pipe 20, and the second valve 301 disposed on the second exhaust pipe 30 is used to control the on/off of the second exhaust pipe 30. Preferably, the second valve 301 may be a cut-off vent valve, which can throttle and depressurize the natural gas flowing to the vent flare 302 so as to prevent the natural gas flowing into the vent flare 302 from being over-pressurized.
In this embodiment, the outlet of the secondary vent 30 is in communication with a flare 302; wherein the flare 302 is used to ignite the natural gas to burn it in the atmosphere to achieve the discharge of 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 may be communicated with an air supply system for supplying air to the compressor 70, so as to recycle the natural gas remaining in the compressor 70 to the air supply system.
The first pressure detection device 102 provided on the first pipeline 10 in the present embodiment may be various as long as it can detect the pressure of the natural gas in the first pipeline 10. For example: the first pressure detecting device 102 may be a pressure gauge disposed on the first pipe 10, and the pressure of the natural gas on the first pipe 10 may be directly obtained through the pressure gauge. Of course, the first pressure detecting device 102 may further include an air pressure sensor, the air pressure sensor may convert an air pressure signal in the first pipeline 10 into an electrical signal, and the electrical signal is processed by a control device, such as a single chip microcomputer and a programmable logic controller, connected to the air pressure sensor, so as to obtain the natural gas pressure in the first pipeline 10.
The use process of the emptying device provided by the embodiment is as follows: when the compressor 70 normally works, 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 overhauled, the compressor 70 and the gas injection valve 702 on the gas injection pipeline 701 are closed; then, slowly opening the first throttle valve 101, acquiring the gas pressure in the first pipeline 10 through the first pressure detection device 102, opening the first valve 201 when the gas pressure in the first pipeline 10 is slightly higher than the inlet pressure of the compressor 70, and allowing the natural gas to enter the inlet of the compressor 70 through the first exhaust pipe 20 to realize the recovery of the natural gas; when the gas pressure in the first pipeline 10 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 emptying torch 302 through the second exhaust pipe 30, the residual natural gas is released by combustion, and the compressor 70 can be overhauled after the residual natural gas in the compressor 70 is completely released.
In the emptying device provided by the embodiment, the inlet of the first throttling valve 101 is communicated with the outlet of the compressor 70, the outlet of the first throttling valve 101 is communicated with the inlet of the first pipeline 10, the outlet of the first pipeline 10 is communicated with the inlets of the first exhaust pipe 20 and the second exhaust pipe 30, the first exhaust pipe 20 is provided with the first valve 201, and the second exhaust pipe 30 is provided with the second valve 301; the outlet of the first exhaust pipe 20 is in communication with the inlet of the compressor 70 and the outlet of the second exhaust pipe 30 is in communication with a flare 302; when overhauing compressor 70, can be earlier retrieve the natural gas that partly remains in compressor 70 to the air supply system for the compression air feed in through first blast pipe 20, later release surplus natural gas through unloading torch 302 again, compare through unloading torch 302 release with all remaining natural gas in the compressor 70, retrieved partial natural gas, and then reduced the waste of natural gas.
In this embodiment, the evacuation device further includes a third exhaust pipe 40 and a third valve 401; an inlet of the third exhaust pipe 40 communicates with an outlet of the first pipe 10, an outlet of the third exhaust pipe 40 is for communicating with the fuel pipe 403, and a third valve 401 is provided on the third exhaust pipe 40. Wherein fuel pipe 403 may be a pipeline for supplying gas to a plant area such as a united station, or a civil natural gas pipeline, etc.; and the gas pressure within fuel line 403 is lower than the inlet pressure of compressor 70 and higher than the gas pressure of flare 302. With such an arrangement, after a part of the natural gas remaining in the compressor 70 is recovered to the gas supply system through the first exhaust pipe 20, a part of the natural gas remaining in the compressor 70 is sent to the fuel pipe 403 through the third pipe 80, so as to further recover the natural gas remaining in the compressor 70; when the pressure of the first pressure sensing device 102 equals the pressure of the gas in the fuel line 403, the third valve 401 is closed, the second valve 301 is opened, and the remaining natural gas is released by the flare 302.
In this embodiment, a first check valve 202 is disposed 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 third valve 401 and the inlet of the fuel pipe 403, the third check valve 402 allowing gas to flow only to the inlet of the fuel pipe 403. This arrangement prevents backflow of natural gas into the compressor 70. Specifically, first check valve 202 may prevent natural gas in the gas supply system from entering compressor 70, and third check valve 402 may prevent natural gas in fuel line 403 from entering compressor 70.
In this embodiment, the emptying device further includes: a flow meter 103, a first service valve 104, and a second service valve 105; the first maintenance valve 104 and the second maintenance valve 105 are both arranged on the first pipeline 10 and are arranged at intervals along the extending direction of the first pipeline 10; the flow meter 103 is disposed on the first pipeline 10 between the first maintenance valve 104 and the second maintenance valve 105, and the flow meter 103 is used for detecting 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 that the volume of the natural gas can be conveniently obtained.
The first maintenance valve 104 and the second maintenance valve 105 are used for cutting off gas sources at two ends of the flow meter 103 when the flow meter 103 is maintained so as to prevent natural gas from leaking.
Further, the evacuation device provided in this example further comprises an exhaust valve 106, an inlet of the exhaust valve 106 is communicated with the first pipe 10 between the first maintenance valve 104 and the second maintenance valve 105, and an outlet of the exhaust valve 106 is used for communicating with the atmosphere. In servicing the flow meter 103, the natural gas in the first pipeline 10 between the first service valve 104 and the second service valve 105 may be released through the vent valve 106.
Specifically, when the flowmeter 103 is to be inspected, the first maintenance valve 104 and the second maintenance valve 105 are first closed, the exhaust valve 106 is then opened, and the natural gas in the first pipeline 10 between the first maintenance valve 104 and the second maintenance valve 105 is exhausted, so that the flowmeter 103 can be inspected.
In this embodiment, the emptying device further comprises a temperature detecting device 107, and the temperature detecting device 107 is disposed on the first pipeline 10 and is used for detecting 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 that the subsequent equipment operation is prevented from being influenced by the overhigh temperature of the natural gas.
Specifically, the temperature detecting device 107 may include a temperature sensor, and the temperature sensor converts a temperature signal of the natural gas into an electrical signal, and the control device obtains the electrical signal to detect the temperature. Of course, the temperature detection device 107 may be a device capable of detecting temperature, such as a thermometer.
In this embodiment, the venting device further comprises a safety valve 50, an inlet of the safety valve 50 is communicated with an inlet of the first exhaust pipe 20, and an outlet of the safety valve 50 is used for communicating with the atmosphere. The natural gas in the first pipeline 10 can be discharged directly to the atmosphere through the safety valve 50.
Preferably, the safety valve 50 may be a relief valve, so that when the gas pressure in the first pipe 10 is higher than a preset value, the relief valve automatically opens to discharge the rest of the first pipe 10 to the atmosphere, and when the gas pressure in the first pipe 10 is lower than the preset pressure value, the relief valve automatically closes. Of course, the safety valve 50 may be a ball valve, a gate valve, or the like.
Specifically, the emptying device further comprises a fourth valve 501 and a fifth valve 502; the inlet of the safety valve 50 communicates with the inlet of the first exhaust pipe 20 through a fourth valve 501, and the inlet of the safety valve 50 also communicates with the outlet of the second valve 301 through a fifth valve 502. The fourth valve 501 can prevent the first pipeline 10 from supplying gas to the safety valve 50, so that the safety valve 50 can be conveniently overhauled; in addition, the natural gas in the vent flare 302 may also be released to the atmosphere via the fifth valve 502 and the relief valve 50.
The working process of the emptying device provided by the embodiment is as follows: when the compressor 70 normally works, 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 overhauled, the compressor 70 and the gas injection valve 702 on the gas injection pipeline 701 are closed; then, slowly opening the first throttle valve 101, acquiring the gas pressure in the first pipeline 10 through the first pressure detection device 102, opening the first valve 201 when the gas pressure in the first pipeline 10 is slightly higher than the inlet pressure of the compressor 70, and allowing the natural gas to enter the inlet of the compressor 70 through the first exhaust pipe 20 to realize the recovery of the natural gas; when the gas pressure in the first pipeline 10 is equal to the inlet pressure of the compressor 70, the first valve 201 is closed, and the third valve 401 is opened, so that the natural gas in the compressor 70 flows into the fuel pipe 403 through the third pipeline 80 to further recover the natural gas in the compressor 70; when the pressure of the natural gas in the first pipeline 10 is reduced to be equal to the pressure in the fuel pipe 403, the third valve 401 is closed, and the second valve 301 is opened, so that the natural gas flows into the flare 302 through the second exhaust pipe 30, the residual natural gas is released by combustion, and the compressor 70 can be repaired after the residual natural gas in the compressor 70 is completely released.
In this embodiment, the emptying device further includes: the second throttle 601, the second pipeline 60 and the second pressure detection device 602; the inlet of the second throttling valve 601 is used for communicating with the outlet of the compressor 70, the outlet of the second throttling valve 601 is communicated with the inlet of the second pipeline 60, and the outlet of the second pipeline 60 is communicated with the inlets of the first exhaust pipe 20 and the second exhaust pipe 30; the second pressure detecting device 602 is provided on the second pipe 60 to detect the air pressure inside the second pipe 60. In the event of a failure of the first throttling valve 101 or the first pipeline 10 or the equipment on the first pipeline 10, the first throttling valve 101 may be closed, or the first maintenance valve 104 and the second maintenance valve 105 may be closed, to prevent the natural gas from flowing in the first pipeline 10; at this time, natural gas is supplied to the first exhaust pipe 20, the second exhaust pipe 30, and the third exhaust pipe 40 through the second throttle 601 and the second pipe 60 so as not to stop the operation of the flare apparatus.
Specifically, the second throttle 601 may be the same as the first throttle 101, and the second pressure detection device 602 may be the same as the first pressure detection device 102.
Preferably, the second pipe 60 may also be provided with a temperature detection device 107, a flow meter 103, a first maintenance valve 104 and a second maintenance valve 105, and the specific arrangement positions and connection manners are substantially the same as those of the first pipe 10, and will not be described herein again.
In this embodiment, a third pipeline 80 is arranged 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 a sixth valve 801 is arranged on the third pipeline 80, so that when the natural gas in the annulus 90 between the oil pipe and the casing needs to be released, the sixth valve 801 is opened to recover and discharge the natural gas.
It should be noted that, in the present 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, the second maintenance valve 105, and the gas injection valve may be ball valves, gate valves, and other valves capable of controlling the on/off of the pipeline in which each valve is located.
Continuing with fig. 1-5. In other embodiments, there is also provided a gas injection system comprising: the compressor 70, the gas injection pipe 701 and the emptying device as described above, the outlet of the compressor 70 is communicated with the annular space 90 through the gas injection pipe 701, and the outlet of the compressor 70 is also communicated with the inlet of the first throttle valve 101 in the emptying device.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
It should be noted that, in the description of the present invention, the terms "first" and "second" are only used for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. An evacuation device, comprising: the first pipeline, the first throttle valve, the first pressure detection device, the first exhaust pipe and the second exhaust pipe; the inlet of the first throttling valve is used for being communicated with the outlet of the compressor, and the outlet of the first throttling valve is communicated with the inlet of the first pipeline; the first pressure detection device is arranged on the first pipeline to detect the air pressure in the first pipeline;
an outlet of the first pipeline is communicated with inlets of the first exhaust pipe and the second exhaust pipe, an outlet of the first exhaust pipe is used for being communicated with an inlet of the compressor, and a first valve is arranged on the first exhaust pipe; and the outlet of the second exhaust pipe is communicated with the emptying torch, and a second valve is arranged on the second exhaust pipe.
2. The venting device of claim 1, further comprising a third vent tube and a third valve; an inlet of the third exhaust pipe is communicated with an outlet of the first pipeline, an outlet of the third exhaust pipe is used for being communicated with a fuel pipe, and the third valve is arranged on the third exhaust pipe.
3. The flare apparatus of claim 2 wherein a first one-way valve is disposed on the first exhaust pipe between the first valve and the compressor inlet, the first one-way valve allowing only gas to flow to the compressor inlet; and 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 only allows gas to flow to the inlet of the fuel pipe.
4. The venting device of claim 1, further comprising: the flow meter, the first maintenance valve and the second maintenance valve;
the first maintenance valve and the second maintenance valve are 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, and the flowmeter is used for detecting the flow of gas in the first pipeline.
5. The venting device of claim 4, further comprising a vent valve, an inlet of the vent valve being in communication with the first conduit between the first and second service valves, an outlet of the vent valve being for communication with the atmosphere.
6. The venting device of claim 1, further comprising a temperature sensing device disposed on the first conduit for sensing the temperature of the gas within the first conduit.
7. The venting device of claim 1, further comprising a safety valve, an inlet of the safety valve being in communication with an inlet of the first exhaust pipe, an outlet of the safety valve being for communication with the atmosphere.
8. The venting device of claim 7, further comprising 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 inlet of the safety valve is also communicated with the outlet of the second valve through the fifth valve.
9. The venting device of claim 1, further comprising: the second throttle valve and the second pipeline are provided with a second pressure detection device; the inlet of the second throttling valve is used for being communicated with the outlet of the compressor, the outlet of the second throttling valve is communicated with the inlet of the second pipeline, and the outlet of the second pipeline is communicated with the inlets of the first exhaust pipe and the second exhaust pipe; the second pressure detection device is arranged on the second pipeline to detect the air pressure in the second pipeline.
10. A gas injection system, comprising: a compressor, an injection gas conduit and a flare of any of claims 1-9, the outlet of the compressor being in communication with the annulus through the injection gas conduit, the outlet of the compressor also being in communication with the first throttling valve inlet in the flare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112096353A (en) * | 2019-06-17 | 2020-12-18 | 中国石油天然气股份有限公司 | Emptying device and gas injection system |
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