CN110578510A - three-phase separator system for gas well liquid drainage process and use method - Google Patents
three-phase separator system for gas well liquid drainage process and use method Download PDFInfo
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- CN110578510A CN110578510A CN201910856285.1A CN201910856285A CN110578510A CN 110578510 A CN110578510 A CN 110578510A CN 201910856285 A CN201910856285 A CN 201910856285A CN 110578510 A CN110578510 A CN 110578510A
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- 239000007788 liquid Substances 0.000 title claims abstract description 289
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims abstract description 167
- 238000000926 separation method Methods 0.000 claims abstract description 35
- 239000010865 sewage Substances 0.000 claims description 50
- 238000006073 displacement reaction Methods 0.000 claims description 30
- 239000012530 fluid Substances 0.000 claims description 30
- 238000007599 discharging Methods 0.000 claims description 22
- 230000001276 controlling effect Effects 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 96
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000003921 oil Substances 0.000 description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011799 hole material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
Abstract
The invention relates to the technical field of gas-liquid separation, in particular to a three-phase separator system used in a gas well liquid discharge process and a using method thereof, which are different from the existing control method in that: 1. the liquid level is controlled to run between the liquid outlet and the gas outlet instead of being controlled to run at a certain height in the separator; 2. the gas outlet and the liquid outlet are controlled by pneumatic pressure regulating valves with the same type and the same parameter, so that the regulating pressure of the two outlets can be equal, and the working pressure of the separator is ensured to be stable; 3. the air pressure regulating valves of the two air and liquid outlets are controlled by a pressure regulating valve, so that the control air pressures of the two air pressure regulating valves are equal, the pressures are equal, namely the pressure in the separator tank is stable, and good separation is ensured; 4. when the air outlet contains liquid drops, the gas-liquid separation can be realized only by increasing the control air pressure of the pressure regulating valve; if the liquid outlet amount and the gas outlet amount are small, the control air pressure of the pressure regulating valve is reduced to reduce the back pressure on the wellhead, and the normal liquid discharge of the gas well can be realized.
Description
Technical Field
The invention relates to the technical field of gas-liquid separation, in particular to a three-phase separator system for a gas well liquid drainage process and a using method thereof.
background
The three-phase horizontal separator separates oil, gas and water by using the principle of gravity separation. The upper part of the inner cavity of the separator is provided with a gas chamber, and the outlet of the gas is arranged at the upper part; the weir plate divides the lower part of the container into an oil chamber and a water chamber, the fluid entering the separator firstly reaches the upper part of the water chamber, under the action of gravity, the lowest part is water, the upper part of the water is oil, and the space above the oil is natural gas. The height of the weir plate is set at 1/2 of the container when leaving factory, so that the liquid level of water is lower than the height of the weir plate in the working process, the highest liquid level of oil is at 3/4 of the liquid level meter, the oil on the water flows over the weir plate and enters the oil chamber, and the working principle of the oil-gas-water three-phase separator is realized.
When the three-phase separator is applied on site, the technical requirements on the fluid are relatively strict:
1. the flow rate of the fluid is controlled and kept relatively stable, and the fluctuation range cannot be too large.
2. The gas-liquid ratio in the fluid should be relatively stable and not too variable.
3. The oil-water ratio should be relatively stable and not negligible.
4. The liquid level is controlled to be at a certain height, and the working pressure is controlled to be kept basically stable.
the three-phase separator is mainly applied to a testing and well testing process of a gas well and a centralized processing process of crude oil. When testing gas well, the liquid content in the gas flow is very small, and the volume of the separator is small, about 4m3(ii) a The working pressure is high and is about 5-10 MPa. When the device is used in a centralized processing station, the amount of gas contained in liquid flow is small, the volume of the separator is large and is about 85m3, and the working pressure is low and is 0.2-0.6 MPa. The two processes which are suitable for the three-phase separator adopt a mode of controlling the height of liquid level in the separator, namely when the liquid level reaches the height of a weir plate in the separator, the opening degree of a liquid outlet valve is increased, otherwise, the opening degree of the liquid outlet valve is reduced, the liquid level is ensured to fluctuate up and down within the range of 185mm, and the good separation effect can be achieved only by ensuring that the working pressure of the separator is changed very little. When the application conditions and the control technology do not meet or meet the technical requirements, the application of the three-phase separator is limited or the separation effect is poor, namely, the water content in the oil is high or the oil content in the water is high; even gas in the liquid and liquid in the gas.
The existing three-phase separator is a control method for controlling the liquid level to be stable at a certain height under a certain separation pressure, and is a fundamental reason for the unstable working pressure and poor gas-liquid separation of the three-phase separator, which is difficult to use in the liquid discharge process of a gas well.
when the gas-liquid ratio in the well is changed, the liquid level in the separator is inevitably changed under the condition that the control pressure is kept stable, the liquid level is increased or decreased, the liquid level is not limited to a certain height, but the liquid level height is automatically changed.
Disclosure of Invention
the invention overcomes the defects of the prior art, provides a three-phase separator system for a gas well liquid discharge process and a using method thereof, and particularly solves the problems of difficult gas-liquid separation and poor separation quality in the oil-gas industry, and also solves the problem of recovery of natural gas and fracturing fluid in liquid discharge after gas well pressing.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a three-phase separator system for gas well drainage process comprises
The device comprises a three-phase separator shell, wherein a separated silt region and a separated liquid region are arranged at the inner bottom of the three-phase separator shell, a separated gas region is arranged at the inner top of the three-phase separator shell, the silt region is provided with a sewage discharge outlet, the liquid region is provided with a liquid discharge outlet, and the gas region is provided with an exhaust outlet;
The gas-liquid inlet pipeline is connected to the three-phase separator shell and is also connected with a gas-liquid inlet control valve;
The sewage discharge pipeline is communicated with a sewage discharge port of the silt region separated in the shell of the three-phase separator;
The liquid discharge pipeline is communicated with a liquid discharge port of a liquid area separated in the shell of the three-phase separator, and a second pneumatic regulating valve is connected to the liquid discharge pipeline;
the gas exhaust pipeline is communicated with a gas exhaust port of a gas area separated from the top in the three-phase separator shell, and a first pneumatic regulating valve is connected to the gas exhaust pipeline;
The pipeline of the gas storage device communicated with the first pneumatic regulating valve and the second pneumatic regulating valve is connected with a pressure regulating valve used for regulating the air pressure at the first pneumatic regulating valve and the second pneumatic regulating valve, so that the control air pressure at the first pneumatic regulating valve and the second pneumatic regulating valve is kept equal;
and a float valve for controlling the opening and closing of the liquid outlet and the air outlet is arranged between the liquid outlet and the air outlet in the shell of the three-phase separator.
The exhaust port is provided with an exhaust valve, the liquid discharge port is provided with a liquid discharge valve, one end of the float valve is connected with the exhaust valve, the other end of the float valve is connected with the liquid discharge valve, and the two valves of the first pneumatic regulating valve and the second pneumatic regulating valve are of the same type, structure and working mode.
The float valve comprises a spherical float, an upper float connecting rod, a lower float connecting rod and a balance valve, one end of the spherical float is connected with the exhaust valve through the upper float connecting rod, the other end of the spherical float is connected with the liquid discharge valve through the lower float connecting rod, and the balance valve is connected with one ends of the upper float connecting rod and the lower float connecting rod, which are connected with the exhaust valve and the liquid discharge valve.
the exhaust valve and the liquid discharge valve respectively comprise a valve seat, a valve shell, a valve displacement baffle, a valve head and a balance valve displacement baffle, the valve seat is connected with the inner wall of the shell of the three-phase separator around the exhaust port, one end of the valve shell is connected with the valve seat, the other end of the valve shell is connected with the valve displacement baffle, the valve head is positioned in the valve shell and can move up and down, the valve head is of a semi-spherical structure, the valve head of the semi-spherical structure is of a hollow structure, the bottom of the valve head is connected with the balance valve displacement baffle, the balance valve penetrates through the balance valve displacement baffle through an upper float connecting rod and is positioned in the valve head, the balance valve and the upper float connecting rod connected with the balance valve head can move up and down in the valve head, the.
the valve displacement baffle is connected with a valve shell, a first through hole is formed in the side wall of one end of the valve shell, a second through hole is formed in the balance valve displacement baffle, and a third through hole is formed in the top of the valve head.
The top of three-phase separator casing still be provided with the relief valve, be provided with in the three-phase separator casing and hide the class board, the exit direction of the second pneumatic control valve that connects on the fluid-discharge line still is connected with the second ball valve, the exit direction of the first pneumatic control valve that connects on the blast pipe way is connected with first ball valve, bottom in the three-phase separator casing is silt, middle part in the three-phase separator casing is separation liquid, top in the three-phase separator casing is separation gas, the leakage fluid dram is provided with the silt baffle on being located the three-phase separator casing inner wall that gas-liquid got into the pipeline entry direction.
The sewage discharge pipeline comprises a first sewage discharge pipeline and a second sewage discharge pipeline, a first sewage discharge valve is connected to the first sewage discharge pipeline, a second sewage discharge valve is connected to the second sewage discharge pipeline, and the gas storage device is a gas storage bottle.
the buoyancy of the spherical floater is equal to 2 times of the self gravity, air chamber diaphragms and valve cores are arranged in the first pneumatic regulating valve and the second pneumatic regulating valve, and the area of the air chamber diaphragms in the first pneumatic regulating valve and the second pneumatic regulating valve is 10 times of the cross section of the valve cores.
the use method of the three-phase separator system for the gas well drainage process comprises the three-phase separator system for the gas well drainage process, and comprises the following steps:
the method comprises the following steps: firstly, closing a gas-liquid inlet control valve on a gas-liquid inlet pipeline of the three-phase separator and a first blow-down valve and a second blow-down valve of a first blow-down pipeline and a second blow-down pipeline, then communicating the gas-liquid inlet pipeline with a fluid drainage pipeline to be separated, and opening a second ball valve on the drainage pipeline and a first ball valve on an exhaust pipeline;
step two: on the basis of the first step, the first pneumatic regulating valve and the second pneumatic regulating valve are normally open pneumatic regulating valves, the pressure regulating valves connected on pipelines communicated with the first pneumatic regulating valve and the second pneumatic regulating valve of the gas storage device are manually regulated firstly, the air pressure at the positions of the first pneumatic regulating valve and the second pneumatic regulating valve is kept equal, meanwhile, the pneumatic control pressure output by the gas storage device is 0.01-0.05MPa, the first pneumatic regulating valve on the exhaust pipeline and the second pneumatic regulating valve on the liquid discharge pipeline are closed at the moment, the air pressure is controlled to be 1/10 for regulating and controlling the internal tank pressure of the three-phase separator through the performance parameters of the first pneumatic regulating valve and the second pneumatic regulating valve, namely the working pressure of the three-phase separator is regulated to 0.1-0.5 MPa;
Step three: on the basis of the second step, the fluid to be measured enters the three-phase separator through a liquid discharge pipeline and then a gas-liquid inlet pipeline, meanwhile, atmospheric liquid is slowly regulated to enter the control valve, so that the fluid inlet amount is gradually increased, then the working pressure of the three-phase separator is observed to be 0.1-0.5MPa, and meanwhile, the liquid level in the three-phase separator appears, which indicates that the separation state is good;
Step four: on the basis of the third step, continuously adjusting atmospheric liquid to enter the control valve to enable the flow of the liquid outlet to reach about 600L/min, so as to meet the requirement of liquid discharge flow, when the liquid level is close to the position of the air outlet, liquid rotation is easy to occur, at the moment, the spherical floater closes the exhaust valve under the combined action of buoyancy and the liquid rotation, namely, the upper floater connecting rod connected with the spherical floater and the connected balance valve drive the valve head to move upwards to block the third through hole at the top of the valve head on the valve shell, so as to close the air outlet, at the moment, the liquid discharge valve at the liquid discharge port is opened, separated liquid enters the liquid discharge valve shell through the third through hole on the side wall of the liquid discharge valve shell, and;
When the first liquid level and the second liquid level are in the middle position in the three-phase separator, the spherical floater is in the middle position, the exhaust valve and the liquid discharge valve are opened simultaneously, and the air outlet and the liquid discharge are respectively discharged at the same time through the control lower exhaust port and the control lower liquid discharge port of the first pneumatic regulating valve and the second pneumatic regulating valve;
when the second liquid level is positioned at the bottom of the three-phase separator, the spherical floater is also positioned at the bottom of the separator, if the liquid outlet generates cyclone, the spherical floater blocks the liquid outlet under the action of the cyclone and gravity, namely the liquid outlet valve is closed, and at the moment, the air outlet is opened, namely the air outlet valve is opened;
when the rotational flow in the three-phase separator disappears, the float valve continuously controls the opening and closing of the exhaust port and the liquid discharge port under the action of buoyancy so as to prevent the liquid outlet from discharging air and prevent the liquid from discharging liquid;
step five: on the basis of the fourth step, when the exhaust port is opened, separated gas enters the gas recovery device through the first pneumatic regulating valve and the first ball valve on the exhaust pipeline for treatment, when the liquid outlet is opened, separated liquid enters the liquid recovery device through the second pneumatic regulating valve and the second ball valve on the liquid discharge pipeline for treatment, and silt at the bottom inside the shell of the three-phase separator is discharged through the sewage discharge pipeline;
step six: on the basis of the fifth step, whether sand and silt are discharged or not is checked at the liquid discharge port at any time, if sand and silt are discharged, the sewage is discharged simultaneously through the first sewage discharge pipeline and the second sewage discharge pipeline, and the situation that the silt in the three-phase separator exceeds the silt baffle plate, enters the liquid area and is discharged is prevented, and the air pressure regulating valve is eroded and damaged; when the sand grain silt discharge appears at the fluid-discharge outlet, then open first blowoff valve and second blowoff valve and carry out the blowdown, when the fluid-discharge outlet does not appear sand grain silt discharge then close first blowoff valve and second blowoff valve.
the invention has the beneficial effects that:
Compared with the prior art, the liquid level is easy to generate liquid rotation when approaching the position of the exhaust port, at the moment, the float valve closes exhaust under the combined action of buoyancy and liquid rotation, and the liquid discharge port is opened; when the liquid level is at the middle position, the float valve is at the middle position, the two outlets are opened simultaneously, and the two outlets respectively discharge air and liquid at the same time under the control of the pneumatic pressure regulating valve; when the liquid level is at the bottom of the separator, the float valve is also at the bottom of the separator, if the liquid discharge port generates cyclone, the float valve can block the liquid discharge port under the action of the cyclone and gravity, and the exhaust port is opened; after the rotational flow disappears, the float valve continues to play a role in opening and closing the two outlets under the action of buoyancy so as to prevent the gas outlet from discharging gas from the liquid outlet and the gas outlet from discharging liquid, thereby ensuring good separation quality of the three-phase separator and solving the problems of difficult gas-liquid separation and poor separation quality in the oil-gas industry.
Drawings
the invention is further illustrated with reference to the following figures and examples.
fig. 1 is a schematic view of the overall structure of the present invention.
fig. 2 is a schematic view of the overall structure of the exhaust valve, the drain valve and the float valve according to the present invention.
fig. 3 is a schematic structural view of the exhaust valve of the present invention when exhausting.
In the figure: 1-gas-liquid inlet control valve, 2-safety valve, 3-baffle plate, 4-three-phase separator shell, 5-separated gas, 6-first liquid level, 7-first pneumatic regulating valve, 8-first ball valve, 9-exhaust valve, 10-second liquid level, 11-spherical floater, 12-separated liquid, 13-liquid discharge valve, 14-second pneumatic regulating valve, 15-second ball valve, 16-pressure regulating valve, 17-gas storage bottle, 18-first sewage discharge valve, 19-silt, 20-second sewage discharge valve, 901-valve seat, 902-valve shell, 903-valve displacement baffle, 904-valve head, 905-balance valve, 906-balance valve displacement baffle and 907-upper float connecting rod.
Detailed Description
example 1:
Referring to fig. 1, which is a schematic structural diagram of embodiment 1 of the invention, a three-phase separator system for a gas well drainage process comprises
the device comprises a three-phase separator shell 4, wherein a separated silt region and a separated liquid region are arranged at the bottom in the three-phase separator shell 4, a separated gas region is arranged at the top in the three-phase separator shell 4, the silt region is provided with a sewage discharge outlet, the liquid region is provided with a liquid discharge outlet, and the gas region is provided with an exhaust outlet;
The gas-liquid inlet pipeline is connected to the three-phase separator shell 4 and is also connected with a gas-liquid inlet control valve 1;
The sewage discharge pipeline is communicated with a sewage discharge port of the separated silt region in the three-phase separator shell 4;
the liquid discharge pipeline is communicated with a liquid discharge port of a liquid area separated in the three-phase separator shell 4, and a second pneumatic regulating valve 14 is connected to the liquid discharge pipeline;
The exhaust pipeline is communicated with an exhaust port of a gas area separated from the top in the three-phase separator shell 4, and a first pneumatic regulating valve 7 is connected to the exhaust pipeline;
the gas storage device is respectively communicated with the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 through pipelines, and the pipelines of the gas storage device communicated with the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 are connected with pressure regulating valves 16 for regulating the gas pressure at the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14, so that the control gas pressure at the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 is kept equal;
A float valve for controlling the opening and closing of the liquid outlet and the air outlet is arranged between the liquid outlet and the air outlet in the three-phase separator shell 4.
In actual use: a gas-liquid mixture to be separated enters a three-phase separator through a gas-liquid inlet pipeline for separation, the gas-liquid inlet pipeline controls the opening and closing and the flow through a control valve 1, a sewage discharge pipeline is used for discharging silt impurities separated in the three-phase separator, a liquid discharge pipeline is used for discharging liquid separated in the three-phase separator, a second pneumatic regulating valve 14 is connected to the liquid discharge pipeline and used for regulating and controlling the working pressure at a liquid discharge port, an exhaust pipeline is used for discharging gas separated in the three-phase separator, a first pneumatic regulating valve 7 is connected to the exhaust pipeline, the first pneumatic regulating valve 7 is used for regulating and controlling the working pressure at the exhaust port, a gas storage device is used for supplying gas to the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14, and a pressure regulating valve 16 is connected to a pipeline communicated with the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 and used for regulating the pressure of the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 so as to The pressure makes the working pressure of the air outlet and the liquid outlet equal, wherein, the two valves of the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 adopt the same type, the same structure and the same working mode of the pneumatic regulating valve, a float valve for controlling the opening and closing of the liquid outlet and the air outlet is arranged between the liquid outlet and the air outlet in the three-phase separator shell 4, the float valve is used for realizing that the air at the air outlet can not flow out and the air at the liquid outlet can not flow out when the fluid entering the three-phase separator is pure gas or pure liquid respectively, the action of the opening and closing of the air outlet and the liquid outlet is controlled, the three-phase separator with the structure is used for separation, the air storage device is used for adjusting the air supply size of the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 by adopting the adjusting and pressure adjusting valve 16, and the working pressure at the positions of the first pneumatic regulating valve 7 and the second pneumatic, thereby adjust the operating pressure of gas vent and leakage fluid dram, make the operating pressure of gas vent and leakage fluid dram equal, adopt the float valve to realize simultaneously that gas vent gas can not go out the liquid, the leakage fluid dram can not give vent to anger, the effect of control gas vent and leakage fluid dram switch, can make the normal separation of three-phase separator simultaneously, the gas vent can not go out the liquid, the leakage fluid dram can not give vent to anger, reach and solve the oil gas trade, gas-liquid separation is difficult, the problem that separation quality is not good, also can solve in the flowing back of gas well pressure, the recovery problem of natural gas and fracturing fluid.
example 2:
referring to fig. 1, 2 and 3, the present embodiment is different from embodiment 1 in that: the exhaust port is provided with an exhaust valve 9, the liquid discharging port is provided with a liquid discharging valve 13, one end of a float valve 11 is connected with the exhaust valve 9, the other end of the float valve is connected with the liquid discharging valve 13, and the two valves of the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 are pneumatic regulating valves of the same type, the same structure and the same working mode.
preferably, the float valve comprises a spherical float 11, an upper float connecting rod 907, a lower float connecting rod 1301 and a balance valve 905, one end of the spherical float 11 is connected with the exhaust valve 9 through the upper float connecting rod 907, the other end of the spherical float 11 is connected with the drain valve 13 through the lower float connecting rod 1301, and the balance valve 905 is connected with one ends of the upper float connecting rod 907 and the lower float connecting rod 1301, which are connected with the exhaust valve 9 and the drain valve 13.
In actual use: the two valves of the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 are of the same type, the same structure and the same working mode, the working pressure of the drain button and the working pressure of the drain outlet are ensured to be equal after regulation, after the float valve is connected with the exhaust valve 9 of the exhaust port and the drain valve 13 of the drain outlet, the opening and closing of the exhaust port and the drain outlet are controlled through the whole structure, wherein the whole structure can automatically control the opening and closing of the exhaust port and the drain outlet through the buoyancy of the liquid amount and the pressure of the gas amount in the three-phase separator, when the buoyancy of the liquid for the spherical float 11 is greater than the pressure of the separated gas for the spherical float 11, the exhaust valve 9 is closed, the drain valve 13 is opened, the upper float connecting rod 907 on the spherical float 11 drives the balance valve 905 in the exhaust valve 9 to rise to close the exhaust port, the lower float connecting rod 1301 on the spherical float 11 drives the balance, when the buoyancy and pressure of the separated gas and liquid to the spherical floater 11 are equal, the exhaust port and the liquid discharge port are opened simultaneously to exhaust and discharge liquid, when the pressure of the gas to the spherical floater 11 is greater than the buoyancy of the separated liquid to the spherical floater 11, the exhaust valve 9 is opened, the liquid discharge valve 13 is closed, the upper floater connecting rod 907 on the spherical floater 11 drives the balance valve 905 in the exhaust valve 9 to descend to open the exhaust port to exhaust, the lower floater connecting rod 1301 on the spherical floater 11 drives the balance valve 905 in the liquid discharge valve 13 to descend to close the liquid discharge port, the balance valve with small aperture of the balance valve 905, namely, the principle is that the buoyancy or self gravity of the spherical floater 11 acts on the balance valve 905 to open the balance valve with small aperture firstly, the liquid or gas in the separator enters the space between the liquid discharge valve or the exhaust valve and the air pressure regulating valve, the pressure difference between the liquid and the air pressure regulating valve is eliminated, and the, the structure controls the closing of the exhaust port and the liquid discharge port, ensures good separation quality, and solves the problems of difficult gas-liquid separation and poor separation quality in the oil-gas industry; the working pressure of the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 is more than or equal to 6MPa, the pressure regulating ratio is more than or equal to 10, the pneumatic control pressure is 0-0.6MPa, the drift diameter is more than or equal to 50mm, and the structure is a normally open type valve seat and a valve core: the sealing gasket has the advantages of erosion resistance and good sealing performance, wherein the erosion resistance is a known technology in the industry, namely the prior art; the regulating output pressure of the pressure regulating valve 16 is 0-0.6MPa, the outlet of the pressure regulating valve 16 is connected with two pipelines in parallel, and is respectively connected with a second pneumatic regulating valve 14 and a first pneumatic regulating valve 7 of a liquid discharge port and an exhaust port, the inlet of the pressure regulating valve 16 is connected with a gas storage device through pipelines, the gas source input pressure of the gas storage device to the pressure regulating valve 16 is 0.6-0.8MPa, and the gas supply pressure of the gas storage device is 0.6-0.8 MPa; the external pressure borne by the spherical floater 11 is more than or equal to 5MPa, the weight is 1/2, and the buoyancy is more than or equal to 40 Kg; the diameter of the outlet of a valve seat 901 of the whole float valve is more than or equal to 50mm, and the stroke is more than or equal to 0.8 m; the diameter of the outlet of the balance valve 905 is less than or equal to 8mm, and the stroke is 5-8 mm; the components with the specifications can be used for normally separating the three-phase separator, and simultaneously controlling the exhaust port and the liquid discharge port to normally exhaust and discharge liquid, so that the phenomena of exhaust of the liquid discharge port and liquid discharge of the exhaust port are avoided.
example 3:
The present embodiment is different from embodiment 2 in that: the exhaust valve 9 and the drain valve 13 each include a valve seat 901, a valve housing 902, a valve displacement baffle 903, a valve head 904 and a balance valve displacement baffle 906, the valve seat 901 is connected with the inner wall of the three-phase separator housing 4 around the exhaust port, one end of the valve housing 902 is connected with the valve seat 901, the other end of the valve housing 902 is connected with the valve displacement baffle 903, the valve head 904 is positioned in the valve housing 902 and can move up and down, the valve head 904 is of a semi-spherical structure, the valve head 904 of the semi-spherical structure is of a hollow structure, the bottom of the valve head is connected with a balance valve displacement baffle 906, the balance valve 905 is positioned in the valve head 904 through the balance valve displacement baffle 906 by an upper float link 907, the balance valve 905 and the connected upper float link 907 can move up and down in the valve head 904, the valve head 904 of the semi-spherical configuration has a diameter less than the inner diameter of the valve housing 902 and the outer side wall of the valve head 904 contacts the inner wall of the valve housing 902.
it is preferable that: the side wall of one end of the valve housing 902, to which the valve displacement baffle 903 is connected, is provided with a first through hole, the balance valve displacement baffle 906 is provided with a second through hole, and the top of the valve head 904 is provided with a third through hole.
in actual use: the valve seat 901 is connected with the inner wall of the three-phase separator shell 4 around the exhaust port, one end of the valve shell 902 is connected with the valve seat 901, the other end of the valve shell 902 is connected with a valve displacement baffle 903, the valve displacement baffle 903 is used for blocking the valve head 904 when the valve head 904 moves downwards, the valve head 904 is positioned in the valve shell 902 and can move upwards and downwards, the valve head 904 is in a semi-spherical structure, the valve head 904 in the semi-spherical structure is in a hollow structure, the bottom of the valve head 904 is connected with a balance valve displacement baffle 906, the balance valve displacement baffle 906 is used for blocking the balance valve 905 when the balance valve 905 moves downwards, the balance valve 905 penetrates through the balance valve displacement baffle 906 through an upper float connecting rod 907 and is positioned in the valve head 904, the balance valve 905 and the connected upper float connecting rod 907 can move upwards and downwards in the valve head 904, the diameter of the valve head in the semi-, guarantee that valve head 904 can control the switch of gas vent or leakage fluid dram, the leakproofness of gas vent or leakage fluid dram is guaranteed in the contact of valve head 904 lateral wall and the inner wall of valve case 902 simultaneously, it has first through-hole to open on the lateral wall of the valve case 902 one end that valve displacement baffle 903 is connected, gas or liquid get into the valve case 902 from first through-hole when gas vent or leakage fluid dram are opened, it has the second through-hole to open on the balanced valve displacement baffle 906, gas or liquid that get into in the valve case 902 get into in the valve head 904 through the second through-hole, open at the top of valve head 904 has the third through-hole, gas or liquid get into in the valve head 904 get into exhaust pipe or leakage fluid dram through the third through-hole, can effectual control the switch of gas vent and leakage fluid dram through this structure.
Example 4:
the present embodiment is different from embodiment 1 in that: the top of three-phase separator casing 4 still be provided with relief valve 2, be provided with in three-phase separator casing 4 and hide and flow board 3, the exit direction of the second pneumatic control valve 14 that connects on the fluid-discharge line still is connected with second ball valve 15, the exit direction of the first pneumatic control valve 7 that connects on the exhaust pipeline is connected with first ball valve 8, bottom in three-phase separator casing 4 is silt 19, and middle part in three-phase separator casing 4 is separation liquid 12, and top in three-phase separator casing 4 is separation gas 5, the leakage fluid dram is provided with the silt baffle on being located the three-phase separator casing 4 inner wall that the gas-liquid got into the pipeline entry direction.
in actual use: the top of the three-phase separator shell 4 is also provided with a safety valve 2, the safety valve 2 is used for opening and discharging pressure when the three-phase separator meets special conditions, so as to ensure the safety of the three-phase separator, a flow shielding plate 3 is arranged in the three-phase separator shell 4, the flow shielding plate 3 is used for flushing an inner float valve when a gas-liquid mixture to be separated enters the three-phase separator with large flow, so as to reduce the flow impulse force of the gas-liquid mixture, the outlet direction of a second pneumatic regulating valve 14 connected on a liquid discharge pipeline is also connected with a second ball valve 15 for controlling the liquid discharge pipeline, the outlet direction of a first pneumatic regulating valve 7 connected on the gas discharge pipeline is connected with a first ball valve 8 for controlling the gas discharge pipeline, a silt baffle plate for shielding the separated impurity silt is arranged on the inner wall of the three-phase separator shell 4 positioned in the inlet direction of the gas-liquid inlet, preventing the second pneumatic adjustment valve 14 from being damaged by erosion of silt.
example 5:
The present embodiment is different from embodiment 1 in that: the sewage discharge pipeline comprises a first sewage discharge pipeline and a second sewage discharge pipeline, a first sewage discharge valve 18 is connected to the first sewage discharge pipeline, a second sewage discharge valve 20 is connected to the second sewage discharge pipeline, and the gas storage device is a gas storage bottle 17.
In actual use: when the impurity silt of separating surpassed silt baffle and the staff observes the leakage fluid dram and has a small amount of silt to come out simultaneously, open first blowdown pipeline and second blowdown pipeline simultaneously and arrange the collection outward simultaneously, be connected with first blowoff valve 18 on the first blowdown pipeline and be used for controlling first blowdown pipeline switch, be connected with the switch that second blowoff valve 20 is used for controlling the second blowdown pipeline on the second blowdown pipeline, gas storage device is used for providing the air supply for first pneumatic control valve 7 and second pneumatic control valve 14 for gas bomb 17.
example 6:
the present embodiment is different from embodiment 2 in that: the buoyancy of the spherical floater 11 is equal to 2 times of the self gravity, air chamber diaphragms and valve cores are arranged in the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14, and the area of the air chamber diaphragms in the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 is 10 times of the cross section of the valve cores.
In actual use: the buoyancy of the spherical floater 11 is equal to 2 times of the self gravity, so that the normal operation of the floater valve is ensured, and the device is suitable for the on-off control of an exhaust port and a liquid discharge port of the three-phase separator in the invention, air chamber diaphragms and valve cores are arranged in the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14, the area of the air chamber diaphragms in the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 is 10 times of the section of the valve cores, and the working pressure of the exhaust port and the liquid discharge port can be always kept equal after the air storage device is used for providing an air source for the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14.
Example 7:
A method of using a three-phase separator system for use in a gas well drainage process including the three-phase separator system of any of embodiments 1-6 above, comprising the steps of:
The method comprises the following steps: firstly, closing a gas-liquid inlet control valve 1 on a gas-liquid inlet pipeline of the three-phase separator and a first blowdown valve 18 and a second blowdown valve 20 of a first blowdown pipeline and a second blowdown pipeline, then communicating the gas-liquid inlet pipeline with a fluid drainage pipeline to be separated, and opening a second ball valve 15 on the drainage pipeline and a first ball valve 8 on the drainage pipeline;
Step two: on the basis of the first step, the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 are normally open pneumatic regulating valves, the pressure regulating valve 16 connected to a pipeline for communicating the gas storage device with the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 is manually regulated firstly, so that the gas pressure at the positions of the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14 is kept equal, meanwhile, the pneumatic control pressure output by the gas storage device is 0.01-0.05MPa, at the moment, the first pneumatic regulating valve 7 on the gas exhaust pipeline and the second pneumatic regulating valve 14 on the liquid discharge pipeline are closed, and the gas pressure is controlled to be 1/10 for regulating and controlling the internal tank pressure of the three-phase separator through the performance parameters of the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14, namely, the working pressure of the three-phase separator is regulated to 0.1-0.5 MPa;
step three: on the basis of the second step, the fluid to be measured enters the three-phase separator through a liquid discharge pipeline and then a gas-liquid inlet pipeline, meanwhile, atmospheric liquid is slowly adjusted to enter the control valve 1, so that the fluid inlet amount is gradually increased, then the working pressure of the three-phase separator is observed to be 0.1-0.5MPa, and meanwhile, the liquid level in the three-phase separator appears, which indicates that the separation state is good;
Step four: on the basis of the third step, continuously adjusting atmospheric liquid to enter the control valve 1 to enable the flow of the liquid outlet to reach about 600L/min, so as to meet the requirement of liquid discharge flow, when the liquid level is close to the position of the gas outlet, liquid rotation is easy to occur, at the moment, the spherical floater 11 closes the gas discharge valve 9 under the combined action of buoyancy and liquid rotation, namely, the upper floater connecting rod 907 connected with the spherical floater 11 and the connected balance valve 905 drive the valve head 904 to move upwards to block the third through hole at the top of the valve head 904 in the valve housing 902, so as to close the gas outlet, at the moment, the liquid discharge valve 13 at the liquid discharge opening is opened, the separation liquid 12 enters the liquid discharge valve housing through the third through hole on the side wall of the liquid discharge valve housing;
When the first liquid level 6 and the second liquid level 10 are in the middle positions in the three-phase separator, the spherical floater 11 is in the middle position, the exhaust valve 9 and the liquid discharge valve 13 are opened simultaneously, and the air outlet and the liquid discharge port are respectively discharged at the same time under the control of the first pneumatic regulating valve 7 and the second pneumatic regulating valve 14;
When the second liquid level 10 is positioned at the bottom of the three-phase separator, the spherical floater 11 is also positioned at the bottom of the separator, if the liquid outlet generates cyclone, the spherical floater 11 blocks the liquid outlet under the action of the cyclone and gravity, namely the liquid outlet valve 13 is closed, and at the moment, the air outlet is opened, namely the air outlet valve 9 is opened;
when the rotational flow in the three-phase separator disappears, the float valve continuously controls the opening and closing of the exhaust port and the liquid discharge port under the action of buoyancy so as to prevent the liquid outlet from discharging air and prevent the liquid from discharging liquid;
Step five: on the basis of the fourth step, when the exhaust port is opened, the separated gas 5 enters the gas recovery device through the first pneumatic regulating valve 7 and the first ball valve 8 on the exhaust pipeline for treatment, when the liquid discharge port is opened, the separated liquid 12 enters the liquid recovery device through the second pneumatic regulating valve 14 and the second ball valve 15 on the liquid discharge pipeline for treatment, and the silt 19 at the bottom in the shell 4 of the three-phase separator is discharged through the sewage discharge pipeline;
step six: on the basis of the fifth step, whether sand and silt are discharged or not is checked at the liquid discharge port at any time, if the sand and silt are discharged, the sewage is discharged simultaneously through the first sewage discharge pipeline and the second sewage discharge pipeline, and the situation that the silt 19 in the three-phase separator exceeds the silt baffle plate, enters the liquid area, is discharged and erodes and damages the air pressure regulating valve 14 is prevented; when the sand grains and mud are discharged from the liquid outlet, the first sewage discharging valve 18 and the second sewage discharging valve 20 are opened for sewage discharging, and when the sand grains and mud are not discharged from the liquid outlet, the first sewage discharging valve 18 and the second sewage discharging valve 20 are closed.
When the three-phase separator discharges sewage, closing the gas-liquid separation process and stopping liquid discharge; washing the silt independently by using a centrifugal pump; the working pressure of the three-phase separator is required to meet the requirements of good gas-liquid separation and liquid discharge flow required by liquid discharge.
If the discharged gas contains liquid droplets under the condition that the discharge flow rate is satisfied, the separator operating pressure should be appropriately increased by the pressure regulating valve 16 so that the separation is good. If the gas-liquid flow rate does not meet the requirement of the liquid discharge flow rate during liquid discharge, the working pressure of the separator is adjusted to be low through the pressure regulating valve 16, so that the normal liquid discharge is ensured.
By the method, the liquid outlet and the gas outlet are controlled by adopting a mechanical throttling control mode, the normal operation of the three-phase separator is ensured, and meanwhile, the float valve is designed in the separator to achieve the effect of auxiliary control. When the liquid level is close to the position of the exhaust port, liquid rotation is easy to occur, at the moment, the float valve closes the exhaust under the combined action of buoyancy and the liquid rotation, and the liquid discharge port is opened; when the liquid level is at the middle position, the float valve is at the middle position, the two outlets are opened simultaneously, and the two outlets respectively discharge air and liquid at the same time under the control of the pneumatic pressure regulating valve; when the liquid level is at the bottom of the separator, the float valve is also at the bottom of the separator, if the liquid discharge port generates cyclone, the float valve can block the liquid discharge port under the action of the cyclone and gravity, and the exhaust port is opened; when the rotational flow disappears, the float valve continues to play a role in opening and closing the two outlets under the action of buoyancy so as to prevent the liquid outlet from discharging air and the air outlet from discharging liquid. The three-phase separator system with the structure and the use method thereof have been tested and tested indoors, all performances of the three-phase separator system reach the standard, and the separation effect of the three-phase separator is optimal.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Technical solutions between various embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Claims (9)
1. a three-phase separator system for gas well drainage technology, characterized by: comprises that
The device comprises a three-phase separator shell (4), wherein a separated silt region and a separated liquid region are arranged at the bottom in the three-phase separator shell (4), a separated gas region is arranged at the top in the three-phase separator shell (4), the silt region is provided with a drain outlet, the liquid region is provided with a liquid outlet, and the gas region is provided with an exhaust outlet;
the gas-liquid inlet pipeline is connected to the three-phase separator shell (4), and is also connected with a gas-liquid inlet control valve (1);
The sewage discharge pipeline is communicated with a sewage discharge outlet of the separated silt region in the three-phase separator shell (4);
the liquid discharge pipeline is communicated with a liquid discharge port of a liquid area separated in the three-phase separator shell (4), and a second pneumatic regulating valve (14) is connected to the liquid discharge pipeline;
The exhaust pipeline is communicated with an exhaust port of a gas area separated from the top in the three-phase separator shell (4), and a first pneumatic regulating valve (7) is connected to the exhaust pipeline;
The air storage device is respectively communicated with the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14) through pipelines, and the pipelines communicated with the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14) of the air storage device are connected with pressure regulating valves (16) used for regulating air pressure at the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14), so that the control air pressure at the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14) is kept equal;
and a float valve for controlling the opening and closing of the liquid outlet and the air outlet is arranged between the liquid outlet and the air outlet in the three-phase separator shell (4).
2. The three-phase separator system for use in gas well drainage processes of claim 1, wherein: the exhaust port be provided with discharge valve (9), the leakage fluid dram is provided with flowing back valve (13), float valve (11) one end is connected with discharge valve (9), and the float valve other end is connected with flowing back valve (13), two valves of first pneumatic control valve (7) and second pneumatic control valve (14) adopt the same model, the same structure, the pneumatic control valve with working method.
3. the three-phase separator system for use in gas well drainage processes of claim 2, wherein: the float valve comprises a spherical float (11), an upper float connecting rod (907), a lower float connecting rod (1301) and a balance valve (905), one end of the spherical float (11) is connected with the exhaust valve (9) through the upper float connecting rod (907), the other end of the spherical float (11) is connected with the drain valve (13) through the lower float connecting rod (1301), and the balance valve (905) is connected with one ends of the upper float connecting rod (907) and the lower float connecting rod (1301) which are connected with the exhaust valve (9) and the drain valve (13).
4. The three-phase separator system for use in gas well drainage processes of claim 3, wherein: the exhaust valve (9) and the liquid discharge valve (13) respectively comprise a valve seat (901), a valve shell (902), a valve displacement baffle (903), a valve head (904) and a balance valve displacement baffle (906), the valve seat (901) is connected with the inner wall of the three-phase separator shell (4) around the exhaust port, one end of the valve shell (902) is connected with the valve seat (901), the other end of the valve shell (902) is connected with the valve displacement baffle (903), the valve head (904) is positioned in the valve shell (902) and can move up and down, the valve head (904) is of a semi-spherical structure, the valve head (904) of the semi-spherical structure is of a hollow structure, the bottom of the valve head is connected with the balance valve displacement baffle (906), the balance valve (905) penetrates through the balance valve displacement baffle (906) through an upper float connecting rod (907) and is positioned in the valve head (904), and the balance valve (905) and the upper float connecting rod (907, the diameter of the valve head (904) of the semi-spherical structure is smaller than the inner diameter of the valve shell (902), and the outer side wall of the valve head (904) is in contact with the inner wall of the valve shell (902).
5. the three-phase separator system for use in gas well drainage processes of claim 4, wherein: the side wall of one end of the valve shell (902) connected with the valve displacement baffle (903) is provided with a first through hole, the balance valve displacement baffle (906) is provided with a second through hole, and the top of the valve head (904) is provided with a third through hole.
6. The three-phase separator system for use in gas well drainage processes of claim 1, wherein: the top of three-phase separator casing (4) still be provided with relief valve (2), be provided with in three-phase separator casing (4) and hide and flow board (3), the exit direction of the second pneumatic control valve (14) that connects on the fluid-discharge line still is connected with second ball valve (15), the exit direction of the first pneumatic control valve (7) that connects on the blast pipe way is connected with first ball valve (8), bottom in three-phase separator casing (4) is silt (19), middle part in three-phase separator casing (4) is separating liquid (12), top in three-phase separator casing (4) is separating gas (5), the fluid-discharge outlet is provided with the silt baffle on being located three-phase separator casing (4) inner wall that gas-liquid got into the pipeline entry direction.
7. The three-phase separator system for use in gas well drainage processes of claim 1, wherein: the sewage draining pipeline comprises a first sewage draining pipeline and a second sewage draining pipeline, a first sewage draining valve (18) is connected to the first sewage draining pipeline, a second sewage draining valve (20) is connected to the second sewage draining pipeline, and the gas storage device is a gas storage bottle (17).
8. The three-phase separator system for use in gas well drainage processes of claim 3, wherein: the buoyancy of the spherical floater (11) is equal to 2 times of the self gravity, air chamber diaphragms and valve cores are arranged in the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14), and the area of the air chamber diaphragms in the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14) is 10 times of the section of the valve cores.
9. A method of using a three-phase separator system for use in a gas well drainage process comprising a three-phase separator system for use in a gas well drainage process as claimed in any one of claims 1 to 9, comprising the steps of:
the method comprises the following steps: firstly, closing a gas-liquid inlet control valve (1) on a gas-liquid inlet pipeline of the three-phase separator and a first blowdown valve (18) and a second blowdown valve (20) of a first blowdown pipeline and a second blowdown pipeline, then communicating the gas-liquid inlet pipeline with a fluid drainage pipeline to be separated, and opening a second ball valve (15) on the drainage pipeline and a first ball valve (8) on the exhaust pipeline;
step two: on the basis of the first step, the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14) are normally open type pneumatic regulating valves, firstly, the pressure regulating valve (16) connected with a pipeline of the air storage device communicated with the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14) is manually regulated, the air pressure at the positions of the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14) is kept equal, meanwhile, the pneumatic control pressure output by the air storage device is 0.01-0.05MPa, at the moment, the first pneumatic regulating valve (7) on the exhaust pipeline and the second pneumatic regulating valve (14) on the liquid discharge pipeline are closed, and the air pressure is controlled to be 1/10 for regulating and controlling the pressure in the three-phase separator through the performance parameters of the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14), namely, the working pressure of the three-phase separator is regulated to 0.1-0.5 MPa;
Step three: on the basis of the second step, the fluid to be measured enters the three-phase separator through a liquid discharge pipeline and then a gas-liquid inlet pipeline, meanwhile, atmospheric liquid is slowly adjusted to enter the control valve (1) to gradually increase the fluid inlet amount, then the working pressure of the three-phase separator is observed to be 0.1-0.5MPa, and meanwhile, the liquid level in the three-phase separator appears to indicate that the separation state is good;
step four: on the basis of the third step, continuously adjusting atmospheric liquid to enter the control valve (1) to enable the flow of a liquid outlet to reach about 600L/min and meet the requirement of liquid discharge flow, when the liquid level is close to the position of an air outlet, liquid rotation is easy to occur, at the moment, the spherical floater (11) closes the exhaust valve (9) under the combined action of buoyancy and the liquid rotation, namely, an upper floater connecting rod (907) connected with the spherical floater (11) and a connected balance valve (905) drive the valve head (904) to move upwards to block a third through hole at the top of the valve head (904) in the valve shell (902), so that the air outlet is closed, at the moment, the liquid discharge valve (13) at the liquid discharge port is opened, and the separation liquid (12) enters the liquid discharge valve shell through the third through hole in the side wall of the liquid discharge valve shell and;
When the first liquid level (6) and the second liquid level (10) are at the middle positions in the three-phase separator, the spherical floater (11) is at the middle position, the exhaust valve (9) and the liquid discharge valve (13) are simultaneously opened, and the exhaust port and the liquid discharge port are simultaneously and respectively discharged with air and liquid under the control of the first pneumatic regulating valve (7) and the second pneumatic regulating valve (14);
when the second liquid level (10) is positioned at the bottom of the three-phase separator, the spherical floater (11) is also positioned at the bottom of the separator, if the liquid outlet generates cyclone, the spherical floater (11) blocks the liquid outlet under the action of the cyclone and gravity, namely the liquid outlet valve (13) is closed, and at the moment, the air outlet is opened, namely the air outlet valve (9) is opened;
when the rotational flow in the three-phase separator disappears, the float valve continuously controls the opening and closing of the exhaust port and the liquid discharge port under the action of buoyancy so as to prevent the liquid outlet from discharging air and prevent the liquid from discharging liquid;
Step five: on the basis of the fourth step, when the exhaust port is opened, separated gas (5) enters a gas recovery device through a first pneumatic regulating valve (7) and a first ball valve (8) on the exhaust pipeline for treatment, when the liquid discharge port is opened, separated liquid (12) enters a liquid recovery device through a second pneumatic regulating valve (14) and a second ball valve (15) on the liquid discharge pipeline for treatment, and silt (19) at the bottom in the shell (4) of the three-phase separator is discharged through a sewage discharge pipeline;
step six: on the basis of the fifth step, whether sand and silt are discharged or not is checked at the liquid discharge port at any time, if the sand and silt are discharged, the sewage is discharged simultaneously through the first sewage discharge pipeline and the second sewage discharge pipeline, and the situation that the sand and silt (19) in the three-phase separator exceeds the sand baffle plate, enters the liquid area to be discharged and erodes and damages the air pressure regulating valve (14) is prevented; when the sand grains and silt are discharged from the liquid discharge port, the first blowdown valve (18) and the second blowdown valve (20) are opened for blowdown, and when the sand grains and silt are not discharged from the liquid discharge port, the first blowdown valve (18) and the second blowdown valve (20) are closed.
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