CN109826594B - Casing gas collection device and using method - Google Patents
Casing gas collection device and using method Download PDFInfo
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- CN109826594B CN109826594B CN201910081375.8A CN201910081375A CN109826594B CN 109826594 B CN109826594 B CN 109826594B CN 201910081375 A CN201910081375 A CN 201910081375A CN 109826594 B CN109826594 B CN 109826594B
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Abstract
The invention relates to a sleeve gas collecting device which comprises a sleeve gas inlet pipeline, a produced liquid inlet pipeline, a buffer tank and a gas-liquid output pipeline, wherein the sleeve gas inlet pipeline is connected with the top of the buffer tank and extends into the buffer tank, and the middle part of one side wall of the buffer tank is communicated with the produced liquid inlet pipeline; the invention also comprises a using method of the casing gas collecting device, which comprises the following steps of S1, detecting the whole tightness of the casing gas collecting device; step S2, turning on the oil-gas mixed transportation pump, and transmitting the oil liquid and the casing gas to the production system through the oil-gas mixed transportation pump; and step S3, detecting the liquid level in the liquid storage tank. The invention can ensure the normal opening and closing of the constant pressure air release valve, avoid the blockage of the pipeline to prevent the sleeve gas from being collected, reduce the production pressure of the stratum, recover the sleeve gas to the maximum extent and improve the production benefit.
Description
Technical Field
The invention relates to the technical field of oil and gas gathering and transportation, in particular to a casing gas collecting device and a using method thereof.
Background
In the oil extraction process of the oil well in the oil field, certain oil well natural gas, also called casing gas, can be volatilized and separated from the annular space between the casing and the oil pipe. Part of the casing gas is accumulated in the oil casing space, so that the liquid level in the oil well is reduced, the effective production pressure difference of the oil well is reduced, and the productivity is reduced; the other part enters the pump cavity of the oil well pump along with liquid flow, occupies a certain pump cavity space, influences the efficiency of the oil well pump, and can generate an air lock phenomenon in serious cases, so that the oil well pump cannot work, the normal production and the efficiency of an oil well are seriously influenced, if the oil well pump is discharged, the pollution to atmosphere is caused, and meanwhile, precious and nonrenewable clean resources are wasted to form vicious circle. Most of products maturely applied at present are constant-pressure air release valves, and the constant-pressure air release valve has the characteristics of low cost, simple structure and the like, when the constant-pressure air release valve is directly collected into a production system, liquid is particularly easy to accumulate in a pipeline from an outlet of the constant-pressure air release valve to the system, the pipeline is extremely easy to condense and cause blockage in winter production, and the constant-pressure air release valve is opened, so that condensed effusion in the pipeline is difficult to be pushed through. Although the distance between the constant pressure bleed valve and the system is shortened as much as possible to overcome this drawback, this phenomenon still frequently occurs. Once this section of condensate is not topped, the casing gas is not normally collected, and therefore a casing gas collection device that overcomes the above-mentioned drawbacks is highly desirable.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a casing gas collecting device and a using method thereof, which can ensure the normal opening and closing of a constant-pressure air release valve, avoid the blockage of a pipeline to prevent casing gas from being collected, reduce the production pressure of a stratum, recover the casing gas to the maximum extent and improve the production benefit.
In order to achieve the purpose, the invention adopts the technical scheme that:
a sleeve gas collecting device comprises a sleeve gas inlet pipeline and a produced liquid inlet pipeline, and further comprises a buffer tank and a gas-liquid output pipeline, wherein the sleeve gas inlet pipeline is connected with the top of the buffer tank and extends into the buffer tank, the middle part of one side wall of the buffer tank is communicated with the produced liquid inlet pipeline, the bottom of the buffer tank is connected with the gas-liquid output pipeline, an oil-gas mixing and conveying pump is arranged on the gas-liquid output pipeline, a gas pipe is fixed in the buffer tank, one end of the gas pipe extends into the gas-liquid output pipeline, and the other end of the gas pipe is arranged close to the top of the buffer tank;
the automatic control device is characterized in that a first check valve, a solenoid valve, a first regulating valve and a constant-pressure air release valve are sequentially arranged on the casing gas inlet pipeline along the direction far away from the buffer tank, at least one U-shaped pipe is respectively connected to the casing gas inlet pipeline between the solenoid valve and the first regulating valve and between the first regulating valve and the constant-pressure air release valve, the bottom center part of the U-shaped pipe is communicated with a liquid storage tank which is of a cone frustum structure, and a sealing cover is installed at the bottom of the liquid storage tank.
Preferably, one end of the sleeve gas inlet pipeline, which is far away from the buffer tank, is connected with a sleeve gas outlet, the sleeve gas outlet is connected with an air pump, the produced liquid inlet pipeline is provided with a second regulating valve and a second one-way valve, and one end of the produced liquid inlet pipeline, which is far away from the buffer tank, is connected with an oil well pump.
In any of the above schemes, preferably, a third regulating valve is arranged on the gas-liquid output line on one side of the input end of the oil-gas mixture transportation pump, and a fourth regulating valve and a third one-way valve are arranged on the gas-liquid output line on one side of the output end of the oil-gas mixture transportation pump.
In any of the above schemes, preferably, the top of the buffer tank is communicated with a safety output pipe, and the safety output pipe is connected with a safety valve.
Preferably in any one of the above schemes, a liquid level detection assembly is arranged on the liquid storage tank, the liquid level detection assembly comprises a liquid level sensor, an overflow pipe and a detection pipe, one end of the overflow pipe is fixed at the top of the side wall of the liquid storage tank and communicated with the top of the side wall of the liquid storage tank, the other end of the overflow pipe is connected with the detection pipe, the liquid level sensor is arranged in the detection pipe, and a sealing plug is arranged at the bottom of the detection pipe.
In any of the above solutions, preferably, the overflow pipe is disposed obliquely, and an end of the overflow pipe away from the liquid storage tank is lower than an end connected to the liquid storage tank.
In any of the above schemes, preferably, the buffer tank is a high-pressure liquid storage tank, and the working pressure in the buffer tank is greater than the pressure of the gas in the casing gas inlet pipeline.
In the preferred of any one of the above schemes, the casing gas collection device further comprises an automatic control system, the automatic control system comprises a controller, a CAN transceiver, a computer and an alarm, the liquid level sensor and the CAN transceiver are both connected with the controller, the computer is connected with the CAN transceiver, the alarm is connected with the computer, and the alarm is arranged on one side of the computer.
In any of the above schemes, preferably, a pressure sensor is arranged in the top of the buffer tank, and the pressure sensor, the safety valve, the oil well pump, the air pump and the oil-gas mixing and transportation pump are all connected with the controller.
The invention also comprises a using method of the casing gas collecting device, which is suitable for any casing gas collecting device, and specifically comprises the following steps:
step S1, detecting the whole tightness of the sleeve gas collecting device, and detecting whether a third regulating valve, a third one-way valve, a second regulating valve, a second one-way valve, a first regulating valve and a constant pressure release valve which are corresponding to the gas-liquid output pipeline, the produced liquid inlet pipeline and the sleeve gas inlet pipeline are damaged or not and can normally work or not;
step S2, opening the oil-gas mixed transportation pump, enabling the oil liquid to enter the buffer tank through the produced liquid inlet pipeline, enabling the sleeve gas to enter the buffer tank from the top of the buffer tank through the sleeve gas inlet pipeline and the U-shaped pipe, enabling the sleeve gas in the buffer tank to enter the gas-liquid output pipeline through the gas pipe, and enabling the oil liquid and the sleeve gas to be conveyed to the production system through the oil-gas mixed transportation pump;
step S3, liquid carried in the sleeve gas is stored in a liquid storage tank through a U-shaped pipe, liquid in the liquid storage tank is gradually increased in circulation of the sleeve gas, when the liquid level of the liquid rises to the position of an overflow pipe, the liquid enters a detection pipe through the overflow pipe, a liquid level sensor detects the liquid level in the detection pipe and sends detected information to a controller, the controller wirelessly transmits communication information to a CAN transceiver, the CAN transceiver transmits the communication information to a computer, the position information of the liquid storage tank needing to release the liquid is displayed through a display screen on the computer, an alarm is given out through the alarm, a worker is reminded to detach and release the stored liquid, and the function of periodical maintenance is achieved;
step S4, the pressure sensor detects the pressure in the buffer tank in real time and transmits the pressure to the controller to be compared with a set value, when the internal pressure of the buffer tank is larger than a preset pressure value range, the pressure sensor transmits a pressure signal to the controller, the controller controls the electromagnetic valve, the oil pump and the air pump to be closed simultaneously, the oil-gas mixed transportation pump continues to suck the oil gas in the buffer tank until the pressure in the buffer tank is in the preset pressure value range, the controller controls the electromagnetic valve to be opened, the oil pump and the air pump start to work again, and when the pressure in the buffer tank detected by the pressure sensor is smaller than the preset pressure value range, the controller controls the oil-gas mixed transportation pump to be closed.
Compared with the prior art, the casing gas collection device and the use method provided by the invention have the following beneficial effects:
1. the output end of the sleeve gas inlet pipeline is arranged at the top of the buffer tank, so that part of liquid in the sleeve gas inlet pipeline can directly flow into the buffer tank under the action of self gravity, the blockage of the sleeve gas inlet pipeline due to icing in winter is avoided, no external force is needed, the U-shaped pipe is arranged on the sleeve gas inlet pipeline, the liquid storage tank is arranged at the bottom of the U-shaped pipe, the liquid in the U-shaped pipe can directly enter the liquid storage tank, the liquid cannot be accumulated in the U-shaped pipe, the through of the sleeve gas inlet pipeline is also ensured, no external force is needed, the cost is low, and the buffer tank has the advantages of simple structure and convenience in use;
2. the gas delivery pipe is arranged in the buffer tank, and the casing gas and the oil liquid can be mixed and output to the production system through the oil-gas mixed delivery pump;
3. the liquid level height detection assembly, the controller and the CAN transceiver are arranged in the U-shaped pipe, so that the liquid level height in the liquid storage tank CAN be automatically detected, when the liquid level sensor detects the liquid level of liquid in the detection pipe, the set height of the liquid level in the liquid storage tank is reached, the alarm is used for warning, and meanwhile, the position information of the liquid storage tank needing to release the liquid is displayed on the display screen, so that a worker CAN find the position and process the position in time, the function of regular maintenance of the worker is realized, the phenomenon that the accumulated liquid blocks the U-shaped pipe to enable sleeve gas to pass through is avoided, the pressure in the buffer tank is detected in real time through the pressure sensor, the controller is used for controlling the electromagnetic valve, the oil well pump and the air pump to be closed, the pressure in the buffer tank is ensured to be;
4. the liquid storage tank is arranged to be in a cone frustum structure, the diameter of the connecting part of the liquid storage tank and the sleeve gas inlet pipeline is the smallest, and under the condition that liquid in the liquid storage tank is caked, the caked liquid can be conveniently discharged from the liquid storage tank;
5. through setting up first check valve, can prevent that the liquid flow direction of buffer tank from playing the guard action in the sleeve pipe gas inlet pipeline.
Drawings
FIG. 1 is a schematic overall structure diagram of a preferred embodiment of the casing gas collection device provided by the present invention;
FIG. 2 is an enlarged view of a portion of A-A in the embodiment of FIG. 1;
FIG. 3 is a block circuit diagram of the embodiment shown in FIG. 1;
fig. 4 is a circuit diagram of the controller.
The figures are labeled as follows: 1. a buffer tank; 2. a safe output pipe; 3. a safety valve; 4. a first check valve; 5. a U-shaped pipe; 6. a first regulating valve; 7. a constant pressure air release valve; 8. a cannula gas inlet line; 9. a liquid storage tank; 10. a produced fluid inlet line; 11. a second regulating valve; 12. a second one-way valve; 13. a gas delivery pipe; 14. a third regulating valve; 15. a third check valve; 16. an oil-gas mixed transportation pump; 17. a fourth regulating valve; 18. a gas-liquid output line; 19. a liquid level sensor; 20. an overflow pipe; 21. a detection tube; 22. an electromagnetic valve.
Detailed Description
In order that the invention may be further understood, the invention will now be described in detail with reference to specific examples.
As shown in fig. 1-4, an embodiment of the casing gas collection device and the use method according to the present invention includes a casing gas inlet pipeline 8 and a produced liquid inlet pipeline 10, the casing gas collection device further includes a buffer tank 1 and a gas-liquid output pipeline 18, the casing gas inlet pipeline 8 is connected with the top of the buffer tank 1 and extends into the buffer tank 1, the middle portion of one side wall of the buffer tank 1 is communicated with the produced liquid inlet pipeline 10, the bottom of the buffer tank 1 is connected with the gas-liquid output pipeline 18, the gas-liquid output pipeline 18 is provided with an oil-gas mixing and conveying pump 16, the oil-gas mixing and conveying pump 16 conveys gas and liquid to a production system, the inside of the buffer tank 1 is fixed with a gas pipe 13, one end of the gas pipe 13 extends into the gas-liquid output pipeline 18, and the other end of the gas pipe 13 is arranged near the top of the buffer tank 1;
the pipeline device is characterized in that a first one-way valve 4, an electromagnetic valve 22, a first regulating valve 6 and a constant pressure air release valve 7 are sequentially arranged on the casing gas inlet pipeline 8 along the direction far away from the buffer tank 1, at least one U-shaped pipe 5 is respectively connected to the casing gas inlet pipeline between the electromagnetic valve 22 and the first regulating valve 6 and between the first regulating valve 6 and the constant pressure air release valve 7, the bottom center part of the U-shaped pipe 5 is communicated with a liquid storage tank 9 which is of a cone frustum structure, and a sealing cover is installed at the bottom of the liquid storage tank 9.
The one end that buffer tank 1 was kept away from to sleeve pipe gas inlet pipeline 8 is connected sleeve pipe gas outlet, connect the aspiration pump on the sleeve pipe gas outlet, be equipped with second governing valve 11 and second check valve 12 on the production liquid inlet pipeline 10, the oil-well pump is connected to the one end that the buffer tank was kept away from to production liquid inlet pipeline.
And a third regulating valve 14 is arranged on the gas-liquid output pipeline on one side of the input end of the oil-gas mixed transportation pump, and a fourth regulating valve 17 and a third one-way valve 15 are arranged on the gas-liquid output pipeline on one side of the output end of the oil-gas mixed transportation pump.
The top of the buffer tank 1 is communicated with a safety output pipe 2, and the safety output pipe 2 is connected with a safety valve 3 for exhausting air to prevent explosion caused by overlarge pressure in the buffer tank.
The bottom diameter of liquid reserve tank 9 is greater than the top diameter, set up liquid level detection subassembly on the liquid reserve tank 9, liquid level detection subassembly includes level sensor 19, overflow pipe 20, detecting tube 21, the one end of overflow pipe is fixed the top of liquid reserve tank lateral wall and its intercommunication, the other end of overflow pipe with the detecting tube is connected, set up in the detecting tube level sensor, the bottom of detecting tube is equipped with the sealing plug.
The overflow pipe is obliquely arranged, and one end, far away from the liquid storage tank, of the overflow pipe is lower than one end, connected with the liquid storage tank, of the overflow pipe, so that liquid can conveniently flow into the detection pipe from the overflow pipe and is not accumulated in the overflow pipe.
The buffer tank 1 is a high-pressure liquid storage tank, and the working pressure in the buffer tank 1 is greater than the pressure of gas in the sleeve gas inlet pipeline 8.
The constant pressure deflation valve 7, the first one-way valve 4, the second one-way valve 12 and the third one-way valve 15 are all made of stainless steel materials.
The sleeve gas collection device further comprises an automatic control system, the automatic control system comprises a controller, a CAN transceiver, a computer and an alarm, the liquid level sensor and the CAN transceiver are all connected with the controller, the computer is connected with the CAN transceiver, the alarm is connected with the computer, the alarm is arranged on one side of the computer, and the controller CAN be an MCU micro controller or a PLC controller (S7-200).
And a pressure sensor is arranged in the top of the buffer tank, and the pressure sensor, the safety valve, the oil well pump, the air pump and the oil-gas mixed transportation pump are all connected with the controller.
And connecting rods are respectively fixed at the tops of the two side walls of the gas conveying pipe 13 and are fixedly connected with the inner wall of the buffer tank 1.
The invention also comprises a using method of the casing gas collecting device, which comprises the following steps:
step S1, detecting the whole tightness of the sleeve gas collecting device, and detecting whether a third regulating valve, a third one-way valve, a second regulating valve, a second one-way valve, a first regulating valve and a constant pressure release valve which are corresponding to the gas-liquid output pipeline, the produced liquid inlet pipeline and the sleeve gas inlet pipeline are damaged or not and can normally work or not;
step S2, opening the oil-gas mixed transportation pump, enabling the oil liquid to enter the buffer tank through the produced liquid inlet pipeline, enabling the sleeve gas to enter the buffer tank from the top of the buffer tank through the sleeve gas inlet pipeline and the U-shaped pipe, enabling the sleeve gas in the buffer tank to enter the gas-liquid output pipeline through the gas pipe, and enabling the oil liquid and the sleeve gas to be conveyed to the production system through the oil-gas mixed transportation pump;
step S3, storing the liquid carried in the casing gas in the liquid storage tank through the U-shaped pipe, increasing the liquid in the liquid storage tank gradually during the circulation of the casing gas, when the liquid level of the liquid rises to the position of the overflow pipe, the liquid enters the detection pipe through the overflow pipe, the liquid level sensor detects the liquid level in the detection pipe, and sends the detected information to the controller, the controller transmits the communication information to the CAN transceiver wirelessly, the CAN transceiver transmits the communication information to the computer, the position information of the liquid storage tank which needs to release liquid is displayed through the display screen on the computer, the alarm is given out to remind the staff to disassemble and release the stored liquid, the function of regular maintenance is realized, when the oil is conveyed into the buffer tank, the liquid level height of the oil is less than the height of the gas transmission pipe, so that the gas transmission pipe is prevented from being submerged by the oil and being blocked so as not to transmit the sleeve gas;
step S4, the pressure sensor detects the pressure in the buffer tank in real time and transmits the pressure to the controller to be compared with a set value, when the internal pressure of the buffer tank is larger than a preset pressure value range, the pressure sensor transmits a pressure signal to the controller, the controller controls the electromagnetic valve, the oil pump and the air pump to be closed simultaneously, the oil-gas mixed transportation pump continues to suck the oil gas in the buffer tank until the pressure in the buffer tank is in the preset pressure value range, the controller controls the electromagnetic valve to be opened, the oil pump and the air pump start to work again, when the pressure in the buffer tank detected by the pressure sensor is smaller than the preset pressure value range, the preset pressure value can be set according to the working environment, and the controller controls the oil-gas mixed transportation pump to be closed, so that the danger of evacuating of the.
The working principle of the embodiment is as follows: opening an oil-gas mixed transportation pump, enabling oil liquid to enter a buffer tank through a produced liquid inlet pipeline, enabling sleeve gas to enter the buffer tank from the top of the buffer tank through a sleeve gas inlet pipeline and a U-shaped pipe, enabling the sleeve gas in the buffer tank to enter a gas-liquid output pipeline through a gas pipe, enabling the oil liquid and the sleeve gas in the buffer tank to be simultaneously conveyed to a production system, enabling part of liquid carried in the sleeve gas flowing through the U-shaped pipe to flow into a liquid storage tank, enabling the liquid level in the liquid storage tank to gradually increase along with accumulation of the liquid, enabling the liquid to enter a detection pipe through an overflow pipe when the liquid level rises to the position of the overflow pipe, detecting through a liquid level sensor, enabling the liquid level sensor to send a detected liquid level signal to a controller, sending the signal to a CAN transceiver, enabling the CAN transceiver to send a communication signal into a computer, and displaying position information of the liquid storage pipe in a display screen on the computer, realize the location accurate, overhaul convenient function, during the maintenance, as long as pull down the sealing plug on sealed lid on the liquid reserve tank and the test tube, liquid flows out from liquid reserve tank and test tube, be about to liquid discharge, avoid liquid to block up U type pipe, guarantee smooth passing through of sleeve pipe gas, when pressure in the buffer tank is greater than the preset pressure value, pressure sensor conveys the signal to the controller, controller control solenoid valve, the oil-well pump is closed, oil-gas mixed transport pump continues to carry away oil and gas in the buffer tank, fall to preset pressure value once until the pressure in the buffer tank, the oil-well pump is opened again to the controller, the aspiration pump carries out oily gaseous transport.
Compared with the prior art, the embodiment has the following beneficial effects:
the output through with sleeve pipe gas inlet pipeline sets up the top at the buffer tank, can make partly liquid in the sleeve pipe gas inlet pipeline directly flow into the buffer tank under self action of gravity, avoid storing up in winter and icing and block up sleeve pipe gas inlet pipeline, need not with the help of any external force, and set up U type pipe on sleeve pipe gas inlet pipeline, set up the liquid reserve tank in the bottom of U type pipe, can make the intraductal liquid of U type directly get into the liquid reserve tank and reach liquid and can't store up in U type pipe, the link up of sleeve pipe gas inlet pipeline has been guaranteed equally, also need not with the help of any external force, therefore, the steam generator is low in cost, and the steam generator is simple in structure, and the use is convenient.
It will be understood by those skilled in the art that the cannula gas collection device and method of use of the present invention includes any combination of the inventive aspects and embodiments of the present invention described above in the specification and illustrated in the drawings, which are not intended to be limited to the details and which are not intended to provide a concise description of the specification. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a sleeve pipe gas collection device, includes sleeve pipe gas inlet pipeline, production liquid inlet pipeline, its characterized in that: the device comprises a buffer tank, a gas-liquid output pipeline, a sleeve gas inlet pipeline, a gas-liquid output pipeline, a gas-liquid mixed delivery pump, a gas pipe and a gas pipe, wherein the sleeve gas inlet pipeline is connected with the top of the buffer tank and extends into the buffer tank;
the automatic control device is characterized in that a first check valve, a solenoid valve, a first regulating valve and a constant-pressure air release valve are sequentially arranged on the casing gas inlet pipeline along the direction far away from the buffer tank, at least one U-shaped pipe is respectively connected to the casing gas inlet pipeline between the solenoid valve and the first regulating valve and between the first regulating valve and the constant-pressure air release valve, the bottom center part of the U-shaped pipe is communicated with a liquid storage tank which is of a cone frustum structure, and a sealing cover is installed at the bottom of the liquid storage tank.
2. The cannula gas collection device of claim 1, wherein: one end of the sleeve gas inlet pipeline, which is far away from the buffer tank, is connected with a sleeve gas outlet, the sleeve gas outlet is connected with an air pump, a second regulating valve and a second one-way valve are arranged on the produced liquid inlet pipeline, and one end of the produced liquid inlet pipeline, which is far away from the buffer tank, is connected with an oil well pump.
3. The cannula gas collection device of claim 2, wherein: and a third regulating valve is arranged on the gas-liquid output pipeline on one side of the input end of the oil-gas mixed transportation pump, and a fourth regulating valve and a third one-way valve are arranged on the gas-liquid output pipeline on one side of the output end of the oil-gas mixed transportation pump.
4. The cannula gas collection device of claim 1, wherein: the top of the buffer tank is communicated with a safety output pipe, and the safety output pipe is connected with a safety valve.
5. The cannula gas collection device of claim 1, wherein: set up liquid level detection subassembly on the liquid reserve tank, liquid level detection subassembly includes level sensor, overflow pipe, detecting tube, the one end of overflow pipe is fixed the top of liquid reserve tank lateral wall and its intercommunication, the other end of overflow pipe with the detecting tube is connected, set up in the detecting tube level sensor, the bottom of detecting tube is equipped with the sealing plug.
6. The cannula gas collection device of claim 5, wherein: the overflow pipe is obliquely arranged, and one end of the overflow pipe, which is far away from the liquid storage tank, is lower than one end connected with the liquid storage tank.
7. The cannula gas collection device of claim 1, wherein: the buffer tank is a high-pressure liquid storage tank, and the working pressure in the buffer tank is greater than the pressure of gas in the sleeve gas inlet pipeline.
8. The cannula gas collection device of claim 5, wherein: the sleeve pipe gas collection device still includes automatic control system, automatic control system includes controller, CAN transceiver, computer, alarm, level sensor, CAN transceiver, solenoid valve all are connected with the controller, the computer with the CAN transceiver is connected, the alarm with the computer is connected, the alarm sets up the one side at the computer.
9. The cannula gas collection device of claim 8, wherein: and a pressure sensor is arranged in the top of the buffer tank, and the pressure sensor, the safety valve, the air pump, the oil well pump and the oil-gas mixed transportation pump are all connected with the controller.
10. The use method of the casing gas collection device is characterized in that: the method specifically comprises the following steps:
step S1, detecting the whole tightness of the sleeve gas collecting device, and detecting whether a third regulating valve, a third one-way valve, a second regulating valve, a second one-way valve, a first regulating valve and a constant pressure release valve which are corresponding to the gas-liquid output pipeline, the produced liquid inlet pipeline and the sleeve gas inlet pipeline are damaged or not and can normally work or not;
step S2, opening the oil-gas mixed transportation pump, enabling the oil liquid to enter the buffer tank through the produced liquid inlet pipeline, enabling the sleeve gas to enter the buffer tank from the top of the buffer tank through the sleeve gas inlet pipeline and the U-shaped pipe, enabling the sleeve gas in the buffer tank to enter the gas-liquid output pipeline through the gas pipe, and enabling the oil liquid and the sleeve gas to be conveyed to the production system through the oil-gas mixed transportation pump;
step S3, liquid carried in the sleeve gas is stored in a liquid storage tank through a U-shaped pipe, liquid in the liquid storage tank is gradually increased in circulation of the sleeve gas, when the liquid level of the liquid rises to the position of an overflow pipe, the liquid enters a detection pipe through the overflow pipe, a liquid level sensor detects the liquid level in the detection pipe and sends detected information to a controller, the controller wirelessly transmits communication information to a CAN transceiver, the CAN transceiver transmits the communication information to a computer, the position information of the liquid storage tank needing to release the liquid is displayed through a display screen on the computer, an alarm is given out through the alarm, a worker is reminded to detach and release the stored liquid, and the function of periodical maintenance is achieved;
step S4, a pressure sensor detects the pressure in the buffer tank in real time and transmits the pressure to a controller to be compared with a preset pressure value, when the internal pressure of the buffer tank is larger than the preset pressure value range, the pressure sensor transmits a pressure signal to the controller, the controller controls the electromagnetic valve, the oil well pump and the air pump to be closed simultaneously, the oil-gas mixed transportation pump continues to suck oil gas in the buffer tank until the pressure in the buffer tank is in the preset pressure value range, the controller controls the electromagnetic valve to be opened, the oil well pump and the air pump start to work again, and when the pressure in the buffer tank detected by the pressure sensor is smaller than the preset pressure value range, the controller controls the oil-gas mixed transportation pump to be closed;
the casing gas collection device of any one of claims 1-9.
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| CN206130422U (en) * | 2016-10-17 | 2017-04-26 | 中国石油集团渤海钻探工程有限公司 | Prevent that hydrate stops up device |
| CN208057098U (en) * | 2018-01-12 | 2018-11-06 | 西安周鼎石油科技有限公司 | A kind of well casing gas recovery device |
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| CN208417846U (en) * | 2018-04-27 | 2019-01-22 | 龚艳玲 | A kind of natural gas supply equipment |
| CN208294498U (en) * | 2018-05-02 | 2018-12-28 | 延长油田股份有限公司志丹采油厂 | A kind of tapping equipment of adjustable well mouth of oil well casing gas |
| CN111603930A (en) * | 2020-06-02 | 2020-09-01 | 黄伟 | Clean briquette burning boiler |
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