CN116877045A - Gas lift reinforced oil-gas-water three-phase cyclone separator in same-well injection-production shaft - Google Patents
Gas lift reinforced oil-gas-water three-phase cyclone separator in same-well injection-production shaft Download PDFInfo
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- CN116877045A CN116877045A CN202310856594.5A CN202310856594A CN116877045A CN 116877045 A CN116877045 A CN 116877045A CN 202310856594 A CN202310856594 A CN 202310856594A CN 116877045 A CN116877045 A CN 116877045A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000000926 separation method Methods 0.000 claims abstract description 135
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 230000008878 coupling Effects 0.000 claims abstract description 25
- 238000010168 coupling process Methods 0.000 claims abstract description 25
- 238000005859 coupling reaction Methods 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000012071 phase Substances 0.000 description 121
- 239000003921 oil Substances 0.000 description 38
- 230000000694 effects Effects 0.000 description 12
- 239000007791 liquid phase Substances 0.000 description 12
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/40—Separation associated with re-injection of separated materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0217—Separation of non-miscible liquids by centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
- B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention relates to a gas lift enhanced oil-gas-water three-phase cyclone separation device in a same-well injection-production shaft, which is formed by connecting a gas-liquid separation module with an oil-water two-phase gas lift high-efficiency separation module, wherein the oil-water two-phase gas lift high-efficiency separation module comprises an upper outer sleeve, an oil-water separation cyclone and a back taper, and the gas-liquid separation module comprises a bridge type channel, a gas-liquid separation cyclone, a spiral flow passage with a screen and a lower outer sleeve; the bridge type channel is a cylinder with an inner cavity, crescent holes are symmetrically arranged on the outer side of the inner cavity, and the bridge type channel is respectively connected with the upper outer sleeve and the lower outer sleeve; the lower outer sleeve is connected with the tubing coupling; the bridge channel is provided with a three-phase mixed liquid inlet hole, and the bottom end of the bridge channel is connected with a gas-liquid separation cyclone; the gas phase overflow pipe is provided with a spiral flow passage with a screen and a filter screen, and the top end of the gas phase overflow pipe and the center Kong Duanjie of the inverted cone base. According to the invention, the efficient separation of the oil-water two-phase medium is promoted by gas lift, so that the lifting cost of the water-phase medium is reduced, the working pressure of a lifting pump is relieved, and the economic benefit is greatly improved.
Description
Technical Field
The invention relates to the field of underground oil-water separation in the petrochemical industry, in particular to a gas lift reinforced oil-gas-water three-phase cyclone separation device in a same-well injection-production shaft.
Background
In oil field exploitation, the produced liquid mainly comprises oil-gas-water three-phase mixed liquid, for high-water-content oil field, the water content of the produced liquid exceeds 98%, the liquid-oil ratio is very high, the back pressure of the system is large, the gathering and transportation efficiency is low, the separation efficiency is poor, in order to ensure the crude oil yield, the productivity input is increased in the oil field, the produced water is circulated for a long time, and the energy consumption of the gathering and transportation system is increased. Water control, oil stabilization, energy conservation and synergy become the main problems for improving the economic benefit of the water-containing oil field. In the current phase of the same-well injection and production technology, the oil-water separation efficiency is difficult to improve due to the uncertainty caused by underground complex working conditions, gas-containing working conditions and the like. Therefore, development of equipment for improving the separation performance of three-phase medium under well by utilizing gas-phase medium under well is necessary.
The Chinese invention patent relates to an oil-gas-water three-phase separator, the patent number is: the device designed by ZL202010261383.3 has a plurality of defects that the structure is too complex and the motor is required to drive the throwing device to rotate, so that the cost is increased, and the separation efficiency of the gas phase is lower and a small part of the gas phase still remains in the liquid phase although the gas-liquid two-phase medium is separated by the throwing device and the partition plate; the device designed by the patent realizes the separation of oil phase and water phase through the spiral flow channel, but has low separation efficiency, and the separated water phase can be utilized after collection and treatment. Therefore, a gas lift enhanced oil-gas-water three-phase cyclone separation device in the same-well injection-production well shaft is needed to realize the efficient separation of downhole multiphase media.
Disclosure of Invention
The invention aims to provide a gas lift enhanced oil-gas-water three-phase cyclone separation device in a same-well injection-production shaft, which is used for solving the problem of low efficiency of the existing oil-gas-water three-phase flow separation device.
The technical scheme adopted for solving the technical problems is as follows: the gas lift enhanced oil-gas-water three-phase cyclone separation device in the same-well injection-production shaft is formed by connecting an oil-water two-phase gas lift efficient separation module with the upper end of a gas-liquid separation module, wherein the oil-water two-phase gas lift efficient separation module comprises an upper outer sleeve, an oil-water separation cyclone and a back taper, and the gas-liquid separation module comprises a bridge type channel, an oil pipe coupling, a water outlet pipeline, a gas-liquid separation cyclone, a screen spiral flow channel and a lower outer sleeve; the bridge type channel is a cylinder with an inner cavity, two crescent holes are symmetrically arranged at the outer side of the inner cavity, the two crescent holes axially penetrate through the bridge type channel, the side wall surface of the lower end of the bridge type channel is in threaded connection with the lower outer sleeve, and the side wall surface of the upper end of the bridge type channel is in threaded connection with the upper outer sleeve; the lower end of the lower outer sleeve is in threaded connection with the tubing coupling; the outer wall of the bridge channel is provided with a three-phase mixed liquid inlet hole, and the bottom center hole of the bridge channel is in threaded connection with the top of the gas-liquid separation cyclone; the gas phase overflow pipe is provided with a spiral flow passage with a screen and a filter screen, the filter screen is arranged at the bottom of the gas phase overflow pipe, the spiral flow passage with the screen is positioned above the filter screen, the gas phase overflow pipe upwards passes through the bridge type passage, and the top end of the gas phase overflow pipe and the center Kong Duanjie of the inverted cone base are arranged on the bottom of the gas phase overflow pipe; the outlet pipeline passes through the crescent hole, the outlet of the bottom pipeline is in embedded short connection with the small hole at the bottom end of the lower outer sleeve, and the inlet of the top pipeline is in embedded short connection with the water outlet of the oil-water separation cyclone.
The oil-water two-phase gas lifting high-efficiency separation module in the scheme further comprises a casing coupling, a spiral flow passage with a top cover and a reverse cone, wherein the lower end of the casing coupling is provided with a sealing plate, the center of the sealing plate is provided with a central hole at the bottom of the casing coupling, the spiral flow passage with the top cover is formed by arranging the top cover and the spiral flow passage outside an oil phase overflow pipe at intervals, the top cover is positioned above the spiral flow passage, the lower port of the casing coupling is in threaded connection with the step at the upper end of the top cover, and the central hole at the bottom of the casing coupling is in short connection with the oil phase overflow pipe; the top cover is a cylinder with steps at the upper end and the lower end, the outer wall of the top cover and the steps at the upper end and the lower end are provided with external threads, the outer wall of the top cover is in threaded connection with the upper outer sleeve, and the steps at the lower end of the top cover are in threaded connection with the oil-water separation cyclone; the base at the bottom of the inverted cone is in threaded connection with the bottom of the oil-water separation cyclone; the oil-water separation cyclone is positioned in the upper outer sleeve, the inverted cone is positioned in the oil-water separation cyclone, the inverted cone is positioned right below the oil phase overflow pipe, and the inverted cone and the oil phase overflow pipe are arranged at intervals.
In the scheme, the upper end of the gas phase overflow pipe is in threaded connection with the central hole at the top of the bridge channel.
In the scheme, the three-phase mixed liquid inlet hole is communicated with the inner cavity of the bridge channel, and the central hole at the bottom end of the bridge channel and the central hole at the top of the bridge channel are both communicated with the inner cavity of the bridge channel.
Advantageous effects
1. The invention creatively designs the spiral flow passage with the screen, the screen can isolate the oil-water mixed liquid phase medium from entering the gas phase overflow pipe in the gas-liquid separation cavity, the gas phase can enter the gas phase overflow pipe through the screen, the oil-water mixed liquid phase medium flows out from the lower bottom flow port to enter the outer cavity, and then the oil-water mixed liquid phase medium is separated through the oil-water separation cyclone, so that the gas-liquid separation performance is extremely high.
2. The cyclone separation effect is enhanced by creatively utilizing the reverse taper gas injection lifting mode. The gas phase separated by the gas-liquid separation cyclone can enter the inverted cone pipe of the oil-water separation cyclone through the gas phase overflow pipe and then is discharged from the small hole at the tip of the inverted cone, so as to generate a aggregation effect on oil nuclei in the oil-water separation process and achieve the effect of enhancing the oil-water separation.
3. The invention creatively designs the bridge channel, which not only can realize medium circulation distinction before and after separation, but also can skillfully inject the separated gas-phase medium into the oil-water two-phase gas-lift high-efficiency separation module.
4. The invention has simple structure, realizes the high-efficiency separation of oil-gas-water three-phase medium in a narrow space under the well, combines the rotational flow and gas lift technology, and further improves the oil-water separation performance.
5. The invention has the advantages of simple structure, compact arrangement and the like, and skillfully promotes the efficient separation of the oil-water two-phase medium by gas lift, reduces the lifting cost of the water-phase medium, relieves the working pressure and the maintenance period of the lifting pump, greatly improves the economic benefit, and simultaneously is convenient for further processing the separated water phase by the design of a bridge type channel and the installation of a water outlet pipeline. Is a multiphase medium high-efficiency separation device suitable for underground.
6. The invention can complete the separation of gas phase and the fine separation of oil-water two phases through the bridge channel and the two-stage cyclone, and simultaneously strengthens the oil-water separation effect by using the reverse cone gas injection gas lift technology, realizes the high-efficiency separation of the oil-water two phases, and ensures that the separated gas phase and oil drop directly enter an oil pipe, and the separated water phase is reinjected into the ground. The device has simple structure and high separation efficiency, can realize the high-efficiency separation of the multiphase medium, and is suitable for the three-phase separation of downhole rotational flow gas lift oil gas and water.
Drawings
Fig. 1 is an overall external view of the present invention.
Fig. 2 is an exploded view of the present invention.
Fig. 3 is an overall cross-sectional view of the present invention.
Fig. 4 is a cross-sectional view of a gas-liquid separation module.
Fig. 5 is an exploded view of the gas-liquid separation module.
Fig. 6 is an enlarged view of a portion of a spiral flow channel with a screen.
Fig. 7 is an external view and a sectional view of the bridge channel.
Fig. 8 is a cross-sectional view of an oil-water two-phase gas-lift high-efficiency separation module.
FIG. 9 is an exploded view of an oil-water two-phase gas-lift high-efficiency separation module.
In the figure, the gas-liquid separation module, 101-bridge type channel, 1011-three-phase mixed liquid inlet, 1012-crescent hole, 1013-bridge type channel top center hole, 1014-bridge type channel bottom center hole, 102-oil pipe coupling, 103-water outlet pipeline, 1031-water outlet pipeline top inlet, 1032 water outlet pipeline bottom outlet, 104-gas-liquid separation cyclone, 1041-bottom flow port, 105-screening spiral flow channel, 1051-filter screen, 1052-gas phase overflow pipe, 106-lower outer sleeve, 1061-lower outer sleeve bottom small hole, 107-lower outer chamber, 2-oil-water two-phase gas-phase high-efficiency separation module, 201-sleeve coupling, 2011-sleeve coupling bottom center hole, 202-upper outer sleeve, 203-oil-water separation cyclone, 2031-oil-water separation cyclone inlet, 2032-oil-water separation cyclone water outlet, 204-top spiral flow channel, 2041-oil phase overflow pipe, 205-back taper, 2051-back taper tip small hole, 206-upper outer chamber.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the integral appearance diagram of the gas lift enhanced oil-gas-water three-phase cyclone separation device in the same-well injection-production shaft is shown in fig. 1, the device is vertically arranged and is used in a vertical working state when in work, the gas phase, the oil phase and the water phase of the multiphase medium mixed liquid can be separated, the separated gas phase and oil phase are directly discharged into an oil outlet pipe, and the separated water phase is reinjected into the ground. Fig. 2 is an explosion diagram of a gas lift enhanced oil-gas-water three-phase cyclone separation device in a same-well injection-production shaft, and mainly comprises a gas-liquid separation module 1 and an oil-water two-phase gas lift efficient separation module 2. The integral cross-section of the gas lift enhanced oil-gas-water three-phase cyclone separation device in the same-well injection-production shaft is shown in fig. 3, oil-gas-water three-phase mixed liquid enters the device from a three-phase mixed liquid inlet hole 1011, gas phase and liquid phase separation can be realized through a gas-liquid separation module 1, the separated liquid phase enters a lower outer chamber 107, enters an oil-water two-phase gas lift high-efficiency separation module 2 through a crescent hole 1012, enters an oil-water separation cyclone 203 from an upper outer chamber 206 for separation, gas lift high-efficiency separation of oil-water two phases is realized under the lifting action of gas discharged from a reverse cone tip small hole 2051, the separated oil phase directly flows out of the device from a casing coupling 201, the separated water phase flows through a 103 water outlet pipeline to enter a 102 oil pipe coupling, and then is reinjected into the ground.
The gas-liquid separation module is provided with a screen at the inlet of the gas phase overflow pipe at the bottom of the spiral flow channel, so that oil-water two phases can be isolated, gas phase medium is separated at first at high efficiency, and gas phase entering the overflow port enters the oil-water two-phase gas lifting high-efficiency separation module through the small hole at the tip of the inverted cone. The oil-water two-phase gas lifting high-efficiency separation module mainly realizes the high-efficiency separation of oil and water, realizes the lifting of an oil phase medium in the cyclone in a reverse cone gas injection mode, thereby improving the separation performance, the separated oil phase is lifted to the ground, and the separated water phase is reinjected into the ground through a water outlet pipeline. According to the cyclone separation device capable of realizing oil-water two-phase gas lift high-efficiency separation, the oil-water separation effect is further enhanced through the gas lift effect.
Fig. 4 is a cross-sectional view of a gas-liquid separation module, wherein the gas-liquid separation module 1 comprises a bridge channel 101, an oil pipe coupling 102, an water outlet pipeline 103, a gas-liquid separation cyclone 104, a spiral flow channel 105 with a screen and a lower outer sleeve 106; the lower side wall surface of the bridge channel 101 is connected with the lower outer sleeve 106 through threaded connection, and the upper side wall surface of the bridge channel is connected with the upper outer sleeve 202 through threaded connection; the lower end of the lower outer sleeve 106 is connected with the tubing coupling 102 through threads; the surface of the bridge channel 101 is provided with a three-phase mixed liquid inlet 1011, and a bottom central hole 1014 is in threaded connection with the external threads on the top of the gas-liquid separation cyclone 104; the bottom of the gas phase overflow pipe 1052 with the screen spiral flow passage 105 is connected with a filter screen 1051, and the top end of the filter screen is connected with the center hole 1013 at the top of the bridge passage through threads and is connected with the base center Kong Duanjie of the inverted cone 205; the water outlet pipeline 103 passes through the crescent hole 1012, the bottom pipeline outlet 1032 is in embedded short connection with the small hole 1061 at the bottom end of the lower outer sleeve, and the top pipeline inlet 1031 is in embedded short connection with the water outlet 2032 of the oil-water separation cyclone.
The oil-gas-water three-phase mixed liquid enters the gas-liquid cyclone separator 104 from the three-phase mixed liquid inlet 1011, forms a strong cyclone field after spiral acceleration of the spiral flow passage 105 with a screen, the light phase gas with smaller density gathers towards the axis, enters the gas phase overflow pipe 1052 of the spiral flow passage 105 with the screen through the filter screen 1051, then is discharged and enters the oil-water two-phase gas-lift high-efficiency separation module 2, most of the oil-water two-phase mixed liquid phase flows out of the bottom flow port 1041 of the gas-liquid cyclone separator 104 into the lower outer chamber 107, a small part of the oil-water two-phase mixed liquid phase is isolated by the filter screen 1051 and also flows out of the bottom flow port 1041 into the lower outer chamber 107, the separated oil-water two-phase mixed liquid phase enters the oil-water two-phase gas-lift high-efficiency separation module 2 through the crescent hole 1012, and the separated water phase flows into the oil pipe coupling 102 through the water outlet 103 and is reinjected into the ground. Fig. 5 is an exploded view of a gas-liquid separation module, which mainly comprises a bridge channel 101, an oil pipe coupling 102, an outlet pipe 103, a gas-liquid separation cyclone 104, a spiral flow channel 105 with a screen and a lower outer sleeve 106. The partial enlarged view of the spiral flow passage 105 with the screen is shown in fig. 6, and the filter screen 1051 is provided with a plurality of small filter holes, so that the gas phase can permeate and the oil phase and the water phase can be isolated. Fig. 7 is an external view and a sectional view of a bridge channel, wherein three-phase mixed liquid inlet holes 1011 are formed on the surface of the bridge channel 101, crescent holes 1012 penetrating from top to bottom are distributed at two ends of the bridge channel and are symmetrical about the center, a top center hole 1013 of the bridge channel is in threaded connection with a gas phase overflow pipe 1052 with a screen spiral flow channel 105, and a bottom center hole 1014 of the bridge channel is in threaded connection with the top external thread of the gas-liquid separation cyclone 104.
Fig. 8 is a cross-sectional view of an oil-water two-phase gas-lift high-efficiency separation module, wherein the oil-water two-phase gas-lift high-efficiency separation module 2 comprises a casing collar 201, an upper outer sleeve 202, an oil-water separation cyclone 203, a spiral flow passage 204 with a top cover and a back taper 205; the casing collar 201 is connected with the upper end of the top cover with the top cover spiral flow channel 204 through threads, and the central hole 2011 at the bottom of the casing collar is in short circuit with the oil phase overflow pipe 2041 with the top cover spiral flow channel 204; the lower end of the top cover with the top cover spiral flow channel 204 is respectively connected with the oil-water separation cyclone 203 and the upper outer sleeve 202 through threads; the base at the bottom of the inverted cone 205 is connected with the bottom of the oil-water separation cyclone 203 through threads; the separated aqueous phase is discharged from the water phase outlet 2032 of the oil-water separation cyclone into the top inlet 1031 of the water outlet pipeline, and then flows out from the bottom outlet 1032 of the water outlet pipeline for reinjection.
The oil-water mixed liquid phase flowing through the crescent hole 1012 enters the upper outer chamber 206, then flows into the oil-water separation cyclone 203 from the liquid inlet 2031 of the oil-water separation cyclone, flows through the spiral flow channel 204 with a top cover, under the action of a strong cyclone field, the oil phase of the light phase gathers towards the axis, the water phase of the heavy phase is thrown towards the side wall and flows out from the water phase outlet 2032 of the oil-water separation cyclone into the water outlet pipeline 103, the gas phase separated from the gas-liquid separation module 1 is discharged from the small hole 2051 with the inverted cone tip, the gas lift effect is generated on the oil phase gathered on the axis, more oil phases are separated under the action of the gas lift, and the gas phase flows out from the oil phase overflow pipe 2041 with the spiral flow channel 204 with the top cover together, enters the casing coupling 201, and then is discharged out of the device. An explosion diagram of the oil-water two-phase gas-lift high-efficiency separation module is shown in fig. 9, and the module consists of a casing collar 201, an upper outer sleeve 202, an oil-water separation cyclone 203, a spiral flow passage 204 with a top cover and a back taper 205.
The invention has compact design structure and reliable and stable operation. The oil-gas-water three-phase mixed liquid can firstly realize the separation of a gas phase and an oil-water mixed liquid phase medium through the gas-liquid separation module, the residual oil-water mixed liquid phase medium after separation is converged into an outer cavity of the device, then enters the oil-water separation module above through a crescent hole of the bridge type channel to further separate, meanwhile, the gas phase separated by the gas-liquid separation module overflows from the back taper tip of the oil-water separation module, the lifting effect of the oil phase in the separation cavity is realized, the oil-water separation effect of the next stage is enhanced, the separated water phase is reinjected into the ground through a water outlet pipeline, and thus the oil-water separation effect is enhanced by gas lifting and the three-phase medium separation is realized. The invention combines the rotational flow and gas lift technology, realizes the high-efficiency separation of oil, gas and water phases, has high working efficiency and good separation effect, is favorable for the sustainable development of oil fields, and has higher practicability.
Claims (4)
1. The utility model provides a gas lift enhanced oil gas water three-phase cyclone separation device in same-well injection production pit shaft which characterized in that: the gas lift enhanced oil-gas-water three-phase cyclone separation device in the same-well injection-production shaft is formed by connecting an oil-water two-phase gas lift efficient separation module with the upper end of a gas-liquid separation module, wherein the oil-water two-phase gas lift efficient separation module comprises an upper outer sleeve, an oil-water separation cyclone and a back taper, and the gas-liquid separation module comprises a bridge type channel, an oil pipe coupling, a water outlet pipeline, a gas-liquid separation cyclone, a screen spiral flow channel and a lower outer sleeve; the bridge type channel is a cylinder with an inner cavity, two crescent holes are symmetrically arranged at the outer side of the inner cavity, the two crescent holes axially penetrate through the bridge type channel, the side wall surface of the lower end of the bridge type channel is in threaded connection with the lower outer sleeve, and the side wall surface of the upper end of the bridge type channel is in threaded connection with the upper outer sleeve; the lower end of the lower outer sleeve is in threaded connection with the tubing coupling; the outer wall of the bridge channel is provided with a three-phase mixed liquid inlet hole, and the bottom center hole of the bridge channel is in threaded connection with the top of the gas-liquid separation cyclone; the gas phase overflow pipe is provided with a spiral flow passage with a screen and a filter screen, the filter screen is arranged at the bottom of the gas phase overflow pipe, the spiral flow passage with the screen is positioned above the filter screen, the gas phase overflow pipe upwards passes through the bridge type passage, and the top end of the gas phase overflow pipe and the center Kong Duanjie of the inverted cone base are arranged on the bottom of the gas phase overflow pipe; the outlet pipeline passes through the crescent hole, the outlet of the bottom pipeline is in embedded short connection with the small hole at the bottom end of the lower outer sleeve, and the inlet of the top pipeline is in embedded short connection with the water outlet of the oil-water separation cyclone.
2. The gas lift enhanced oil, gas and water three-phase cyclone separation device in the same-well injection and production shaft as claimed in claim 1, wherein: the oil-water two-phase gas-lift high-efficiency separation module further comprises a casing coupling, a spiral flow passage with a top cover and a back taper, wherein a sealing plate is arranged at the lower end of the casing coupling, a central hole at the bottom of the casing coupling is formed in the center of the sealing plate, the spiral flow passage with the top cover is formed by arranging the top cover and the spiral flow passage outside an oil phase overflow pipe at intervals, the top cover is positioned above the spiral flow passage, a lower port of the casing coupling is in threaded connection with a step at the upper end of the top cover, and the central hole at the bottom of the casing coupling is in short connection with the oil phase overflow pipe; the top cover is a cylinder with steps at the upper end and the lower end, the outer wall of the top cover and the steps at the upper end and the lower end are provided with external threads, the outer wall of the top cover is in threaded connection with the upper outer sleeve, and the steps at the lower end of the top cover are in threaded connection with the oil-water separation cyclone; the base at the bottom of the inverted cone is in threaded connection with the bottom of the oil-water separation cyclone; the oil-water separation cyclone is positioned in the upper outer sleeve, the inverted cone is positioned in the oil-water separation cyclone, the inverted cone is positioned right below the oil phase overflow pipe, and the inverted cone and the oil phase overflow pipe are arranged at intervals.
3. The gas lift enhanced oil, gas and water three-phase cyclone separation device in the same-well injection and production shaft as claimed in claim 2, wherein: the upper end of the gas phase overflow pipe is in threaded connection with a central hole at the top of the bridge channel.
4. The gas lift enhanced oil, gas and water three-phase cyclone separation device in the same-well injection and production shaft as claimed in claim 3, wherein: the three-phase mixed liquid inlet is communicated with the bridge channel cavity, and the bridge channel bottom center hole and the bridge channel top center hole are both communicated with the bridge channel cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310856594.5A CN116877045A (en) | 2023-07-12 | 2023-07-12 | Gas lift reinforced oil-gas-water three-phase cyclone separator in same-well injection-production shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310856594.5A CN116877045A (en) | 2023-07-12 | 2023-07-12 | Gas lift reinforced oil-gas-water three-phase cyclone separator in same-well injection-production shaft |
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| CN116877045A true CN116877045A (en) | 2023-10-13 |
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| CN202310856594.5A Pending CN116877045A (en) | 2023-07-12 | 2023-07-12 | Gas lift reinforced oil-gas-water three-phase cyclone separator in same-well injection-production shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117942626A (en) * | 2024-03-22 | 2024-04-30 | 大庆师范学院 | Wellhead rotational flow gravity coupling multiphase medium efficient preseparation device |
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2023
- 2023-07-12 CN CN202310856594.5A patent/CN116877045A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117942626A (en) * | 2024-03-22 | 2024-04-30 | 大庆师范学院 | Wellhead rotational flow gravity coupling multiphase medium efficient preseparation device |
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