CN212003130U - Movable skid-mounted pressure reduction gas production device - Google Patents
Movable skid-mounted pressure reduction gas production device Download PDFInfo
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- CN212003130U CN212003130U CN202020355304.0U CN202020355304U CN212003130U CN 212003130 U CN212003130 U CN 212003130U CN 202020355304 U CN202020355304 U CN 202020355304U CN 212003130 U CN212003130 U CN 212003130U
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Abstract
The utility model provides a movable skid-mounted pressure reduction gas production device, which comprises a compression module and a direct output module, wherein the compression module and the direct output module are arranged in parallel, the compression module comprises a liquid storage and drainage tank and an air-vent valve, a first gas-liquid separator, a second gas-liquid separator, a filter, a gas compressor and a gas cooler which are connected in sequence, and the air-vent valve receives well site natural gas; the first gas-liquid separator performs gas-liquid preliminary separation to obtain first separated natural gas and first separated liquid; finely separating the second gas-liquid separator to obtain second separated natural gas and second separated liquid; filtering by using a filter; the gas compressor compresses natural gas and then conveys the compressed natural gas to a gas cooler; the gas cooler is cooled and then is conveyed to an external conveying pipe network; the liquid storage and drainage tank stores the first separated liquid and the second separated liquid; the direct output module comprises a bypass line and an overpressure automatic switching valve. The utility model discloses a device simple to operate maintains simply, can improve the gas well recovery ratio, prolongs the exploitation period of gas well.
Description
Technical Field
The utility model relates to an oil and gas exploitation technical field, more specifically say, relate to a movable sled dress step-down gas production device.
Background
For large "low-pore, low-permeability, low-pressure" gas reservoirs, some gas wells are initially produced and natural gas can be lifted from the subsurface reservoir through the wellbore to the surface pipeline by virtue of the formation's own ability. Along with the continuous exploitation of natural gas, the stratum ability gradually loses, and when the stratum pressure drops to a certain threshold value and the oil pressure of a wellhead is smaller than the pressure of an output pipeline, fluids such as natural gas cannot be naturally lifted to the ground from a shaft and flow to a gas collecting station through the output pipeline. However, some low pressure or water-containing gas wells cannot be lifted to the surface by their own energy at the beginning of production, and natural gas must be produced by external force.
SUMMERY OF THE UTILITY MODEL
To overcome the deficiencies in the prior art, one of the objects of the present invention is to solve one or more of the problems of the prior art. For example, one of the objects of the utility model is to provide a can reduce well head pressure in order to improve the movable sled dress step-down gas production device of gas well gas production ability.
In order to achieve the above object, the utility model provides a movable sled dress step-down gas production device, the device can include compression module and direct output module, compression module and direct output module set up in parallel, wherein, the compression module can include air-vent valve, first vapour and liquid separator, second vapour and liquid separator, filter, gas compressor, gas cooler and stock solution flowing back are irritated, wherein, well site natural gas is received to the one end of air-vent valve, and the other end is connected with the first vapour and liquid separator; the first gas-liquid separator receives the natural gas subjected to pressure regulation by the pressure regulating valve and performs primary gas-liquid separation on the received natural gas to obtain first separated natural gas and first separated liquid; the second gas-liquid separator receives the first separated natural gas and finely separates the first separated natural gas to obtain a second separated natural gas and a second separated liquid; the filter receives the second separated natural gas, filters the second separated natural gas and then conveys the second separated natural gas to a gas compressor; the fuel gas compressor receives the second separated natural gas filtered by the filter, compresses the second separated natural gas and then conveys the compressed second separated natural gas to the gas cooler; the gas cooler receives the natural gas compressed by the fuel compressor, cools the natural gas and then conveys the cooled natural gas to an external pipeline network; the liquid storage and drainage tank is respectively connected with the first gas-liquid separator and the second gas-liquid separator and is used for storing the first separated liquid and the second separated liquid;
the direct output module can comprise a bypass pipeline and an overpressure automatic switching valve, wherein one end of the bypass pipeline receives the wellsite natural gas, and the other end of the bypass pipeline is connected with an external pipeline network; the overpressure automatic switching valve is arranged on a bypass pipeline and can switch between a well site natural gas input compression module and a direct output module.
The utility model discloses an in an exemplary embodiment of movable sled dress step-down gas production device, gas compressor with the stock solution flowing back is irritated and is passed through the pipe connection gas compressor with the stock solution flowing back is irritated and is provided with the feed liquor valve on the pipeline of connection.
The utility model discloses an in an exemplary embodiment of movable sled dress step-down gas production device, first pressure separator is hollow structure, including first pressure separator skin, set up at the outer inboard anticorrosive heat preservation of first pressure separator, first pressure separator large aperture filter screen and first pressure separator small aperture filter screen parallel arrangement are in hollow structure, first pressure separator large aperture filter screen sets up the upper portion of first pressure separator small aperture filter screen.
The utility model discloses an in an exemplary embodiment of movable sled dress step-down gas production device, the second pressure separator is hollow structure, including the outer, the setting of second pressure separator at the outer inboard anticorrosive heat preservation of second pressure separator, first aperture filter screen, liquid level detector and the second aperture filter screen of second pressure separator, first aperture filter screen and second aperture filter screen parallel arrangement in proper order are in among the hollow structure, shown liquid level detector is arranged in monitoring the liquid level in the second gas-liquid separator.
In an exemplary embodiment of the present invention, the movable skid-mounted depressurization gas production device is a V-type gas compressor.
The utility model discloses an in an exemplary embodiment of movable sled dress step-down gas production device, the liquid storage flowing back is irritated including a jar body, is set up at the anticorrosive heat preservation of jar body of the internal side of jar and is set up the liquid storage flowing back of jar in jar body and irritate the aperture filter screen.
In an exemplary embodiment of the movable skid-mounted pressure-reducing gas production device of the present invention, the heat exchange medium of the gas cooler is an antifreeze.
In an exemplary embodiment of the present invention, the gas compressor can utilize the second separated natural gas for self-powering.
Compared with the prior art, the beneficial effects of the utility model include:
(1) the utility model discloses a gas compressor can utilize the natural gas of input to provide power for self when compressing the natural gas, need not external power supply to share a bent axle, need not carry out power conversion, the compression efficiency of compressor is high;
(2) the pressure-reducing gas production device has the advantages of low noise, low emission, high gas use efficiency and no need of special compressor lubricating oil;
(3) the utility model discloses a step-down gas production device need not the water source, simple to operate, and it is simple to maintain, has broken the defeated pressure balance of adopting of original low-pressure well, hydrops well, establishes a lower low pressure gas production system, can improve the gas well recovery ratio, prolongs the exploitation cycle of gas well.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
fig. 1 shows a mobile skid-mounted depressurization gas production device according to an exemplary embodiment of the present invention.
Description of reference numerals:
1-a pressure regulating valve, 2-a first gas-liquid separator, 3-a second gas-liquid separator, 4-a filter, 5-a gas compressor, 6-a gas cooler, 7-a liquid storage and drainage tank, 8-a bypass pipeline, 9-an overpressure automatic switching valve, 10-a liquid inlet valve, 2 a-a first gas-liquid separator outer layer, 2 b-a first gas-liquid separator anticorrosive and heat insulation layer, 2 c-a first gas-liquid separator large-aperture filter screen, 2 d-a first gas-liquid separator small-aperture filter screen, 3 a-a second gas-liquid separator outer layer, 3 b-a second gas-liquid separator anticorrosive and heat insulation layer, 3 c-a first small-aperture filter screen, 3 d-a liquid level detector, 3 e-a second small-aperture filter screen, 7a tank body and 7 b-a tank body anticorrosive, 7 c-small aperture filter screen for liquid storage and drainage.
Detailed Description
Hereinafter, a mobile skid-mounted depressurization gas recovery device according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
Particularly, the utility model discloses come the well site gas through the valve of coming into the station and get into the air-vent valve through connecting, through the pressure regulating valve to pressure regulation to be fit for the numerical value of gas compressor entry pressure after, get into first vapour and liquid separator, carry out preliminary gas-water separation and silt and filter. The natural gas after the separation of first vapour and liquid separator gets into second vapour and liquid separator, carries out the smart separation of gas-liquid once more, and the liquid after the separation gets into stock solution flowing back jar, is discharged the place of formulating by the intermittent type, also can subside once more through stock solution flowing back jar and open the feed liquor valve after filtering and provide cooling liquid for the gas compressor. The separated natural gas enters a filter to reach an inlet of a gas compressor, the filtered natural gas enters the compressor to be compressed, and then the compressed natural gas is cooled by a gas cooler and enters an external pipeline network. The utility model discloses with the help of the compressor fluid is pumped in to the pit shaft, can discharge the pit shaft hydrops, repressurizes the natural gas again to this activation gas well reduces well head pressure as far as possible, enlargies production pressure differential, and the reinforcing gas well is taken the liquid ability, and the gas well productivity of fully releasing improves the gas production ability of low pressure low efficiency gas well.
The utility model provides a movable sled dress step-down gas production device. In an exemplary embodiment of the present invention, the removable skid-mounted pressure reduction device may include a compression module and a direct output template. The compression template and the direct output template may be arranged in parallel. The wellsite natural gas can be conveyed to an external pipeline network through the compression module and the direct output template. The compression template can comprise a pressure regulating valve 1, a first gas-liquid separator 2, a second gas-liquid separator 3, a filter 4, a gas compressor 5, a gas cooler 6 and a liquid storage and drainage tank 7, wherein,
one end of the pressure regulating valve 1 is used for receiving wellsite natural gas, for example, the pressure regulating valve can be connected with a production pipeline of a Christmas tree to receive natural gas, and the other end of the pressure regulating valve is connected with the first gas-liquid separator 2. The pressure regulating valve 1 can regulate the pressure of the well site natural gas to a pressure value of a proper gas compressor 5;
the first gas-liquid separator 2 is connected with the pressure regulating valve 1 and used for performing preliminary gas-water separation and sediment filtration on the pressure-regulated natural gas output by the pressure regulating valve 1 to obtain first separated natural gas and first separated liquid. The first gas-liquid separator 2 may comprise a first outlet and a second outlet, and the first outlet may be connected to the second gas-liquid separator 3 for transporting the first separated natural gas to the second gas-liquid separator 3. The second outlet can be connected with the liquid storage and drainage tank 7 and is used for conveying the first separated liquid to the liquid storage and drainage tank 7;
the second gas-liquid separator 3 is capable of receiving the first separated natural gas and performing fine gas-liquid separation on the first separated natural gas to obtain a second separated natural gas and a second separated liquid. The second gas-liquid separator 3 may include a third outlet and a fourth outlet. The third outlet is connected to the filter 4 for delivering the second separated natural gas to the filter 4. The fourth outlet is connected with the liquid storage and drainage tank 7 and is used for conveying the second separated liquid to the liquid storage and drainage tank 7;
one end of the filter 4 is connected with the second gas-liquid separator 3, and the other end is connected with the gas compressor 5. The filter is used for absorbing water vapor in the second separated natural gas;
the gas compressor 5 is capable of compressing the received filtered second separated natural gas. The gas compressor 5 can utilize a part of the entered natural gas to provide power for the gas compressor engine, and the other part of the entered natural gas is used for compression without providing power by an external power supply or a large amount of self-provided fuel; the compressor 5 can adjust the rotating speed according to the load, and further achieves the purpose of adjusting the load.
One end of the gas cooler 6 is connected with the gas compressor 5, and the other end of the gas cooler is connected with an external conveying pipe network. The gas air cooler 6 can cool the natural gas compressed by the gas compressor 5;
the liquid storage and drainage tank 7 is respectively connected with the first gas-liquid separator 2 and the second gas-liquid separator 3, can receive the first separated liquid and the second separated liquid and stores the first separated liquid and the second separated liquid.
The direct output template may include a bypass line 8 and an overpressure automatic switching valve 9. The bypass line 8 has one end for receiving the wellsite natural gas, for example, connected to a production line of a christmas tree, and the other end connected to an external pipeline network. The overpressure automatic switching valve 9 is arranged on the bypass line 8. The overpressure automatic switching valve 9 can switch the natural gas of the well site from entering the contraction module to directly outputting the template. When the pressure of the gas well exceeds the output pressure or the gas compressor is automatically stopped, the well site natural gas is directly output to the output pipeline network through the bypass pipeline 8 without being compressed by the compressor, and the danger caused by overpressure of the gas well pipeline can be prevented. When the pressure of the gas well is low, the overpressure automatic switching valve keeps a standby state, and the compression module operates.
In this embodiment, the gas compressor 5, the first gas-liquid separator 2, the second gas-liquid separator 3 and the liquid storage and drainage tank 7 may be combined into a compressor unit. The compressor unit can be transported to a well site through a trailer, construction is carried out on the flat ground 10-15 m away from a wellhead, and construction operation is convenient.
In this embodiment, the gas compressor 5 may be a V-type gas compressor. The V-shaped gas compressor can be a 7.54-liter V8 industrial gas engine.
In this embodiment, the heat exchange medium of the gas cooler 6 may be an antifreeze.
In this embodiment, the pressure regulating valve 1, the first gas-liquid separator 2, the second gas-liquid separator 3, the filter 4, the gas compressor 5, the gas cooler 6, and the liquid storage and drainage tank 7 may be connected to each other by pipes.
In this embodiment, the gas compressor 5 may be connected to the liquid storage and drainage tank 7. An inlet valve 10 can be arranged between the gas compressor 5 and the liquid storage and drainage tank 7. When the liquid level of the liquid storage and drainage tank 7 reaches a certain height, the liquid inlet valve 10 is opened, and cooling liquid can be provided for the gas compressor 5, for example, the cooling liquid can be provided for the gas compressor in summer.
In the present embodiment, as shown in fig. 1, the first gas-liquid separator 2 may have a hollow structure. The first gas-liquid separator 2 may include a first gas-liquid separator outer layer 2a, a first gas-liquid separator anticorrosive heat-insulating layer 2b disposed inside the first gas-liquid separator outer layer 2a, a first gas-liquid separator large-aperture filter screen 2c disposed in the hollow structure, and a first gas-liquid separator small-aperture filter screen 2 d. The first gas-liquid separator large-aperture filter screen 2c and the first gas-liquid separator small-aperture filter screen 2d are arranged in parallel. The first gas-liquid separator large-aperture filter screen 2c is arranged on the upper part of the first gas-liquid separator small-aperture filter screen 2 d.
In the present embodiment, as shown in fig. 1, the second gas-liquid separator 3 may have a hollow structure. The second gas-liquid separator 3 may include a second gas-liquid separator outer layer 3a, a second gas-liquid separator anticorrosive heat-insulating layer 3b arranged on the inner side of the second gas-liquid separator outer layer 3a, a first small-aperture filter screen 3c, a liquid level detector 3d and a second small-aperture filter screen 3e arranged from top to bottom in sequence. The liquid level detector 3d is for detecting the liquid level height in the second gas-liquid separator. When the liquid level is higher than the set value, the regulating valve 1 is closed, and the gas-liquid mixed phase fluid flows into an external pipeline at the natural gas outlet through the overpressure automatic switching valve 9 and the bypass pipeline 8. The set value may be a given value.
In this embodiment, as shown in fig. 1, the liquid storage and drainage tank 7 may include a tank 7a, a tank anticorrosion and insulation layer 7b disposed inside the tank 7a, and a liquid storage and drainage tank small-aperture filter screen 7c disposed in the tank. The small-aperture filter screen 7c for liquid storage and drainage can further filter the received first separated liquid and second separated liquid to be used as cooling liquid for the gas compressor.
And when all the equipment pipelines are connected, pressurizing to 0.8 MPa, waiting for 10 minutes, checking leakage, pressurizing to 3 MPa, waiting for half an hour, checking leakage, pressurizing to the highest pressure, waiting for half an hour, checking leakage, performing next operation after the leakage is checked to be qualified, if the ground pipelines are leaked, connecting again, and then repeating the pressure testing mode until the pipelines are qualified.
The utility model discloses a movable sled dress step-down gas production device's design parameter can be for: (1) the air inlet pressure: -10 to 60psi (-0.07MPa to 0.42 MPa); (2) exhaust pressure: 20-400 psi (0.14-2.8 MPa); (3) the maximum displacement is 2.1 multiplied by 104m 3/d; (4) compression ratio: 20: 1; (5) temperature of compressor output gas: less than or equal to 50 ℃; (6) the rotating speed of the compressor is 1500 rpm/h-2400 rpm/h; (7) power: 48hp (35 kW); (8) power gas consumption: 90m3/d～210m3D; (9) cooling liquid temperature: -76 DEG F to 230 DEG F (-24.4 ℃ to 110 ℃).
In summary, the gas compressor of the utility model can compress natural gas, and can utilize the input natural gas to provide power for the gas compressor, without an external power supply, and share a crankshaft, without power conversion, and the compression efficiency of the compressor is high; the pressure-reducing gas production device has the advantages of low noise, low emission, high gas use efficiency and no need of special compressor lubricating oil; the method has the advantages of no need of water source, convenient installation and simple maintenance, breaks through the balance of the production and transportation pressure of the original low-pressure well and the original liquid well, creates a lower low-pressure gas production system, and can improve the recovery ratio of the gas well and prolong the exploitation period of the gas well.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A movable skid-mounted pressure-reducing gas production device is characterized by comprising a compression module and a direct output module, wherein the compression module and the direct output module are arranged in parallel,
the compression module comprises a pressure regulating valve, a first gas-liquid separator, a second gas-liquid separator, a filter, a gas compressor, a gas cooler and a liquid storage and drainage tank, wherein,
one end of the pressure regulating valve receives the well site natural gas, and the other end of the pressure regulating valve is connected with the first gas-liquid separator;
the first gas-liquid separator receives the natural gas subjected to pressure regulation by the pressure regulating valve and performs primary gas-liquid separation on the received natural gas to obtain first separated natural gas and first separated liquid;
the second gas-liquid separator receives the first separated natural gas and finely separates the first separated natural gas to obtain a second separated natural gas and a second separated liquid;
the filter receives the second separated natural gas, filters the second separated natural gas and then conveys the second separated natural gas to a gas compressor;
the fuel gas compressor receives the second separated natural gas filtered by the filter, compresses the second separated natural gas and then conveys the compressed second separated natural gas to the gas cooler;
the gas cooler receives the natural gas compressed by the gas compressor, cools the natural gas and then conveys the cooled natural gas to an external pipeline network;
the liquid storage and drainage tank is respectively connected with the first gas-liquid separator and the second gas-liquid separator and is used for storing the first separated liquid and the second separated liquid;
the direct output module comprises a bypass pipeline and an overpressure automatic switching valve, wherein one end of the bypass pipeline receives the well site natural gas, and the other end of the bypass pipeline is connected with an external pipeline network;
the overpressure automatic switching valve is arranged on a bypass pipeline and can switch between a well site natural gas input compression module and a direct output module.
2. The movable skid-mounted depressurization gas production device according to claim 1, wherein the gas compressor is connected with the liquid storage and drainage tank through a pipeline, and a liquid inlet valve is arranged on the pipeline connecting the gas compressor with the liquid storage and drainage tank.
3. The movable skid-mounted pressure-reducing gas production device according to claim 1, wherein the first gas-liquid separator is of a hollow structure and comprises a first gas-liquid separator outer layer, a first gas-liquid separator anti-corrosion heat-insulation layer arranged on the inner side of the first gas-liquid separator outer layer, a first gas-liquid separator large-aperture filter screen and a first gas-liquid separator small-aperture filter screen, the first gas-liquid separator large-aperture filter screen and the first gas-liquid separator small-aperture filter screen are arranged in the hollow structure in parallel, and the first gas-liquid separator large-aperture filter screen is arranged on the upper portion of the first gas-liquid separator small-aperture filter screen.
4. The movable skid-mounted pressure-reducing gas production device according to claim 1, wherein the second gas-liquid separator is of a hollow structure and comprises a second gas-liquid separator outer layer, a second gas-liquid separator anti-corrosion heat-insulation layer arranged on the inner side of the second gas-liquid separator outer layer, a first small-aperture filter screen, a liquid level detector and a second small-aperture filter screen, the first small-aperture filter screen and the second small-aperture filter screen are sequentially arranged in the hollow structure in parallel, and the liquid level detector is used for monitoring the liquid level in the second gas-liquid separator.
5. The mobile skid-mounted depressurization gas production device according to claim 1, wherein the gas compressor is a V-type gas compressor.
6. The movable skid-mounted pressure-reducing gas production device according to claim 1, wherein the liquid storage, drainage and irrigation tank comprises a tank body, a tank body anticorrosion and insulation layer arranged on the inner side of the tank body, and a liquid storage, drainage and irrigation tank small-aperture filter screen arranged in the tank body.
7. The movable skid-mounted pressure-reducing gas production device according to claim 1, wherein the heat exchange medium of the gas cooler is an antifreeze.
8. The transportable skid-mounted reduced pressure gas production unit of claim 1, wherein the gas compressor is capable of powering itself with the filtered second separated natural gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020355304.0U CN212003130U (en) | 2020-03-19 | 2020-03-19 | Movable skid-mounted pressure reduction gas production device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020355304.0U CN212003130U (en) | 2020-03-19 | 2020-03-19 | Movable skid-mounted pressure reduction gas production device |
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| CN212003130U true CN212003130U (en) | 2020-11-24 |
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| CN202020355304.0U Active CN212003130U (en) | 2020-03-19 | 2020-03-19 | Movable skid-mounted pressure reduction gas production device |
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