CN106640031A - Downhole same-well injection-production gas-liquid separator - Google Patents
Downhole same-well injection-production gas-liquid separator Download PDFInfo
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- CN106640031A CN106640031A CN201611072154.7A CN201611072154A CN106640031A CN 106640031 A CN106640031 A CN 106640031A CN 201611072154 A CN201611072154 A CN 201611072154A CN 106640031 A CN106640031 A CN 106640031A
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- 239000007788 liquid Substances 0.000 title claims abstract description 213
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 73
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000338 in vitro Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- 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
- E21B43/38—Arrangements for separating materials produced by the well in the well
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention provides a downhole same-well injection-production gas-liquid separator. The gas-liquid separator is combined with an electric submersible pump, an overhead type electric submersible pump drainage gas production lifting system is adopted, and downhole separation of gas-liquid mixed flow can be achieved. The downhole same-well injection-production gas-liquid separator is characterized in that the gas-liquid separator is further provided with a gas-liquid separator body, a gas-liquid separating cover and a gas-liquid outer spiral body; the gas-liquid separator body is located in a cavity body surrounded by an upper housing, a liquid inlet housing and a lower housing, and formed in the mode that a gas-liquid separating body upper transmission shaft, a gas-liquid separating guide section, a gas-liquid separating body reverse cone section and a gas-liquid separating body lower transmission shaft are connected in sequence from top to bottom; a guide vane is welded outside the gas-liquid separating guide section; a gas inlet is formed in the gas-liquid separating body reverse cone section, and the outlet of a gas hole channel is located in the inner cavity of the upper housing; the gas-liquid separating cover is a hollow inverted frustum, and the gas-liquid outer spiral body is also the hollow inverted frustum.
Description
Technical field
The present invention relates to a kind of down-hole gas-liquid for submersible electric pump same well production-injection being applied in construction of natural gas fields field
Separator.
Background technology
Gas and water is easily produced during gas well liquid loading with the phenomenon produced, the product water of gas well can cause gas well plug-ging, to gas
The production of well can produce grievous injury, eventually result in gas well and stop production because of water logging.For the problem of gas well plug-ging, generally adopt
Drainage gas recovery.Withdrawal in Gas Production by Use of Electric Submersible Pump hoisting system has the advantages that displacement range is big, lift is high and convenient management.At present
Withdrawal in Gas Production by Use of Electric Submersible Pump hoisting system is that the liquid that will be isolated is discharged to ground and is processed, and the lifting of substantial amounts of liquid will disappear
A large amount of electric energy are consumed, while increasing ground water process input and increased the risk of environmental pollution.Same well production-injection technology can be with
Realize down-hole gas-liquid separation and produced-water reinjection.But when withdrawal in Gas Production by Use of Electric Submersible Pump hoisting system is applied to the hydrops gas of high gas-liquid ratio
When in well, due to impact of the contained free gas to the jacking capacity of centrifugal multistage pump multiple centrifugal pump in well liquid, it may appear that this is extreme existing for gas lock
As.
The content of the invention
The technical problem being previously mentioned in order to solve background technology, the present invention provides a kind of down-hole same well production-injection gas-liquid separation
Device, this kind of gas-liquid separator can be applied to hydrops gas well, and be implemented in combination with gas-liquid mixed stream in down-hole with overhead type submersible electric pump
Separate, and the liquid isolated is injected in down-hole re-injection layer, the gas extraction separated.
The technical scheme is that：This kind of down-hole same well production-injection gas-liquid separator, including upper shell, feed liquor shell and
Lower casing, it is unique in that：Also there is the gas-liquid separator gas-liquid separation main body, gas-liquid to separate cover and the outer spiral shell of gas-liquid
Rotation body；
Wherein, upper shell has mounting flange and content cavity, vertically on be provided with the center through hole passed through for upper power transmission shaft,
The top of the content cavity is provided with steam vent；
The top of feed liquor shell is provided with inlet opening, is connected by flange between feed liquor shell and upper shell；The lower end of feed liquor shell
It is threaded connection and the top of lower casing between；The bottom of lower casing has lower casing discharge opeing section, the lower casing discharge opeing section
The center through hole passed through for lower drive shaft is provided with, and is vertically provided with some lower casing discharge opeing ducts；
The gas-liquid separation main body is located in the cavity surrounded by upper shell, feed liquor shell and lower casing；The gas-liquid separation
Main body is by power transmission shaft, gas-liquid separation main body diversion section, gas-liquid separation main body inverted cone segment and gas-liquid separation in gas-liquid separation main body
Main body lower drive shaft is constituted after from top to bottom sequentially connecting；Guide vane is connected in the gas-liquid separation main body diversion section outside weld；
Power transmission shaft is realized connecting with the rotation of the upper shell by the 3rd rolling bearing and the 3rd movable sealing structure in gas-liquid separation main body
Connect and seal；Gas-liquid separation main body lower drive shaft is realized and the lower casing by the first rolling bearing and the 4th movable sealing structure
Rotation connection and sealing.
Air admission hole is provided with gas-liquid separation main body inverted cone segment, the vent being connected with the air admission hole is vertically passed through
The gas-liquid separation main body inverted cone segment and gas-liquid separation main body diversion section are worn, the outlet of the vent is positioned at the interior of upper shell
In cavity volume；The second movable sealing structure is placed between the gas-liquid separation main body diversion section and the upper shell.
Gas-liquid separate cover be hollow inversion taper type, its underpart be provided with gas-liquid separate cover outage, gas-liquid separate cover with
By thread connection, gas-liquid separates the cone angle of cover more than gas-liquid separation main body inverted cone segment for the lower end of gas-liquid separation main body inverted cone segment
Cone angle, so that leaving annular space between the two, the annular space separates cover outage and is connected with gas-liquid.
Gas-liquid external spiral body is also hollow inversion taper type, and the cone angle that its cone angle separates cover with gas-liquid is identical；Outside gas-liquid
Spirochetal inside is fixed with external spiral piece, and the space in external spiral piece central authorities is just available for gas-liquid separation main body inverted cone segment and gas-liquid point
It is embedded every cover；The bottom of gas-liquid external spiral body is provided with the center through hole passed through for lower drive shaft, power transmission shaft and the outer spiral shell of the gas-liquid
Realize that rotary seal connects by the first dynamic sealing and the second rolling bearing between the bottom of rotation body；The gas-liquid external spiral body
Bottom is provided with gas-liquid external spiral outage, and the stage casing of the gas-liquid external spiral body is provided with gas-liquid external spiral shell outage.
Thread connection is adopted between the gas-liquid external spiral body and lower casing.
The present invention has the advantages that：The gas-liquid separation main body power transmission shaft of this kind of gas-liquid separator is driven with electric submersible pump
Axle couples, and after electric submersible pump motor operation, power transmission shaft drives the rotation of gas-liquid separator main body power transmission shaft, gas-liquid mixed stream by feed liquor outside
The inlet opening of shell is entered in gas-liquid separation main body, makes mixed flow flow down to gas-liquid external spiral body in the presence of guide vane
It is interior, in the case where outer flight drives, make gas-liquid mixed stream that centrifugal force is produced in rotary course, promote the gas-liquid that there is density variation
Two-phase produces separation, and causes gas-liquid two-phase to realize separating in the case where gas-liquid separates the compartmentation of cover, and gas is in gas-liquid separation master
Exhaust passage hole of the body inverted cone segment in interior axle is moved upwards, and the steam vent of the upper shells of Jing is discharged to device in vitro, liquid Jing gas
Liquid external spiral shell outage is entered in lower casing chamber.Separate the liquid in covering under the influence of centrifugal force by gas-liquid into gas-liquid
Separate cover outage and gas-liquid external spiral outage is discharged, the outage for moving downward Jing lower casing discharge opeing sections with other liquid enters
Enter submersible electric pump suction inlet.This kind of gas-liquid separator is applicable to produce in water, the same well production-injection technique of gas well, decreases or even eliminates
Impact of the gas to submersible electric pump effect.
Description of the drawings：
Fig. 1 is the cut-open view of final assembly of same well production-injection gas-liquid separator in down-hole of the present invention.
Fig. 2 is the general assembly schematic diagram of same well production-injection gas-liquid separator in down-hole of the present invention.
Fig. 3 is that gas-liquid separation main body of the present invention separates the general assembly schematic diagram after cover assembling with flow deflector, gas-liquid.
Fig. 4 is the structural representation of gas-liquid separation main body of the present invention.
Fig. 5 is the structural representation of guide vane of the present invention.
Fig. 6 is the structural representation that gas-liquid of the present invention separates cover.
Fig. 7 is the structural representation of feed liquor shell of the present invention.
Fig. 8 is the structural representation of upper shell of the present invention.
Fig. 9 is the structural representation of lower casing of the present invention.
Figure 10 is the structural representation of gas-liquid external spiral body of the present invention.
Figure 11 is the structural representation of gas-liquid external spiral body case of the present invention.
Figure 12 is the structural representation of external spiral piece of the present invention.
Power transmission shaft in 1- gas-liquid separations main body in figure, the upper shells of 2-, 3- steam vent 4- gas-liquid separation main bodys, 5- inlet openings,
6- gas-liquid separation main body diversion sections, 7- feed liquor shells, 8- guide vanes, 9- exhaust passage holes, 10- gas-liquid separation main body back tapers
Section, 11- external spiral pieces, 12- gas-liquid external spiral bodies, 13- gas-liquids separate cover, and 14- gas-liquids separate cover outage, the outer spiral shell of 15- gas-liquids
Rotation outage, 16- lower casings, 17- gas-liquid separation main body lower drive shafts, the dynamic sealings of 18- the 4th, 19- lower casing discharge opeing sections, 20-
Lower casing outage, the rolling bearings of 21- first, the rolling bearings of 22- second, the dynamic sealings of 23- first, 24- gas-liquid external spiral shells
Outage, the dynamic sealings of 25- first, the dynamic sealings of 26- the 3rd, the rolling bearings of 27- the 3rd.
Specific embodiment：
Below in conjunction with the accompanying drawings the invention will be further described：
By shown in Fig. 1 to Figure 12, this kind of down-hole same well production-injection gas-liquid separator, including upper shell 2, feed liquor shell 7 and lower outer
Shell 16, it is unique in that：Also there is the gas-liquid separator gas-liquid separation main body 4, gas-liquid to separate outside cover 13 and gas-liquid
Conveyor screw 12.
Wherein, upper shell 2 has mounting flange and content cavity, vertically on be provided with the central authorities passed through for upper power transmission shaft and lead to
Hole, on the top of the content cavity steam vent 3 is provided with；
The top of feed liquor shell 7 is provided with inlet opening 5, is connected by flange between feed liquor shell 7 and upper shell 2；Feed liquor shell 7
It is threaded connection between the top of lower end and lower casing 16；Lower casing, 16 bottom has a lower casing discharge opeing section 19, it is described under
Shell discharge opeing section is provided with the center through hole passed through for lower drive shaft 17, and is vertically provided with some lower casing discharge opeing ducts 20.
The gas-liquid separation main body 4 is located in the cavity surrounded by upper shell 2, feed liquor shell 7 and lower casing 16；It is described
Gas-liquid separation main body is by power transmission shaft 1, gas-liquid separation main body diversion section 6, gas-liquid separation main body inverted cone segment 10 in gas-liquid separation main body
And constitute after the sequentially connection from top to bottom of gas-liquid separation main body lower drive shaft 17；Outside the gas-liquid separation main body diversion section 6
It is welded with guide vane 8；Power transmission shaft 1 is realized by the 3rd rolling bearing 27 and the 3rd movable sealing structure 26 in gas-liquid separation main body
With the rotation connection and sealing of the upper shell；Gas-liquid separation main body lower drive shaft 17 is dynamic by the first rolling bearing 21 and the 4th
Sealing structure 18 realizes the rotation connection and sealing with the lower casing.
Air admission hole 9 is provided with gas-liquid separation main body inverted cone segment 10, the vent being connected with the air admission hole is along vertical
Upper shell is located to the outlet through the gas-liquid separation main body inverted cone segment and gas-liquid separation main body diversion section, the vent
In 2 content cavity；The second movable sealing structure 25 is placed between the gas-liquid separation main body diversion section and the upper shell.
It is hollow inversion taper type that gas-liquid separates cover 13, and its underpart is provided with gas-liquid and separates cover outage 14, and gas-liquid separates
Cover 13 passes through thread connection with the lower end of gas-liquid separation main body inverted cone segment 10, and gas-liquid separates the cone angle of cover 13 and is more than gas-liquid separation master
The cone angle of body inverted cone segment 10, so that leaving annular space between the two, the annular space separates cover outage 14 with gas-liquid
It is connected.
Gas-liquid external spiral body 12 is also hollow inversion taper type, and the cone angle that its cone angle separates cover with gas-liquid is identical；Gas-liquid
The inside of external spiral body is fixed with external spiral piece 11, and the space in external spiral piece central authorities is just available for gas-liquid separation main body inverted cone segment gentle
It is embedded that liquid separates cover；The bottom of gas-liquid external spiral body is provided with the center through hole passed through for lower drive shaft 17, power transmission shaft and the gas
Realize that rotary seal connects by the first dynamic sealing 23 and the second rolling bearing 22 between the bottom of liquid external spiral body；The gas-liquid
The bottom of external spiral body is provided with gas-liquid external spiral outage 15, and the stage casing of the gas-liquid external spiral body is provided with gas-liquid external spiral shell
Outage 24.
Thread connection is adopted between the gas-liquid external spiral body and lower casing 16.
This device is provided with guide vane in the gas-liquid separation main body diversion section of gas-liquid separation main body, so contributes to gas-liquid and mixes
Interflow has certain rotation speed during flowing downward；In addition, the gas-liquid external spiral body that this device is provided with, its back taper
Structure can make gas and liquid change not too large moving downward process medium velocity, reduce the damage of gas and liquid energy
Lose, its external spiral contributes to gas-liquid and separated；This device separates the gas-liquid separation cover outage that cover bottom is arranged in gas-liquid, can
So as to be discharged by gas-liquid separation cover outage into the liquid in gas-liquid separation cover.
This kind of separator is combined with submersible electric pump, using overhead type withdrawal in Gas Production by Use of Electric Submersible Pump hoisting system, it is possible to achieve gas
Liquid mixed flow is separated in down-hole, and the liquid isolated is injected in down-hole re-injection layer, and the gas separated is plucked out of.Its tool
Body running process is as follows：When submersible electric pump starts, the operation of electric submersible pump motor rotates separator main body by power transmission shaft,
Gas-liquid mixed stream is entered in gas-liquid separation main body by the inlet opening of feed liquor shell, in the presence of guide vane, makes gas-liquid mixed
Stream has certain rotation speed and flows down in gas-liquid external spiral body.Then under the drive of outer flight, gas-liquid mixed is made
Stream forms spiral flow, and gas-liquid mixed stream produced centrifugal force in rotary course promotes the gas-liquid two-phase that there is density variation to produce
Estranged to move to center from, low-density gas, highdensity liquid move to outer wall, and separates the compartmentation for covering in gas-liquid
Down so that gas-liquid two-phase is realized separating, exhaust passage hole of the gas in gas-liquid separation main body inverted cone segment in interior axle is transported upwards
Dynamic, the steam vent of the upper shells of Jing is discharged to device in vitro, and liquid Jing gas-liquid external spiral shells outage is entered in lower casing chamber, so as to
Realize gas-liquid separation.The liquid separated into gas-liquid in cover is separated outside cover outage and gas-liquid under the influence of centrifugal force by gas-liquid
Spiral outage is discharged, and is sucked into submersible electric pump with the lower casing outage that other liquid move downward Jing lower casing discharge opeing sections
Mouthful.
Claims (1)
1. a kind of down-hole same well production-injection gas-liquid separator, including upper shell（2）, feed liquor shell（7）And lower casing（16）, it is special
Levy and be：The gas-liquid separator also has gas-liquid separation main body（4）, gas-liquid separate cover（13）And gas-liquid external spiral body
（12）；
Wherein, upper shell（2）With mounting flange and content cavity, vertically on be provided with the central authorities passed through for upper power transmission shaft and lead to
Hole, on the top of the content cavity steam vent is provided with（3）；
Feed liquor shell（7）Top be provided with inlet opening（5）, feed liquor shell（7）With upper shell（2）Between by flange connect；Enter
Liquid shell（7）Lower end and lower casing（16）Top between be threaded connection；Lower casing（16）Bottom there is lower casing
Discharge opeing section（19）, the lower casing discharge opeing section is provided with and supplies lower drive shaft（17）The center through hole for passing through, and if being vertically provided with
Dry lower casing discharge opeing duct（20）；
The gas-liquid separation main body（4）Positioned at by upper shell（2）, feed liquor shell（7）And lower casing（16）In the cavity for surrounding；
The gas-liquid separation main body is by power transmission shaft in gas-liquid separation main body（1）, gas-liquid separation main body diversion section（6）, gas-liquid separation main body
Inverted cone segment（10）And gas-liquid separation main body lower drive shaft（17）Constitute after from top to bottom sequentially connecting；In the gas-liquid separation master
Body diversion section（6）Outside weld is connected to guide vane（8）；Power transmission shaft in gas-liquid separation main body（1）By the 3rd rolling bearing（27）With
3rd movable sealing structure（26）Realize the rotation connection and sealing with the upper shell；Gas-liquid separation main body lower drive shaft（17）It is logical
Cross the first rolling bearing（21）With the 4th movable sealing structure（18）Realize the rotation connection and sealing with the lower casing；
In gas-liquid separation main body inverted cone segment（10）On be provided with air admission hole（9）, the vent being connected with the air admission hole is along vertical
Upper shell is located to the outlet through the gas-liquid separation main body inverted cone segment and gas-liquid separation main body diversion section, the vent
（2）Content cavity in；The second movable sealing structure is placed between the gas-liquid separation main body diversion section and the upper shell（25）；
Gas-liquid separates cover（13）For hollow inversion taper type, its underpart is provided with gas-liquid and separates cover outage（14）, gas-liquid separation
Cover（13）With gas-liquid separation main body inverted cone segment（10）Lower end by thread connection, gas-liquid separates cover（13）Cone angle be more than gas-liquid
Separate main body inverted cone segment（10）Cone angle so that leave annular space between the two, the annular space separates cover with gas-liquid
Outage（14）It is connected；
Gas-liquid external spiral body（12）Also it is hollow inversion taper type, its cone angle separates cover with gas-liquid（13）Cone angle it is identical；Gas
Liquid external spiral body（12）Inside be fixed with external spiral piece（11）, external spiral piece（11）The space in central authorities is just available for gas-liquid separation master
Body inverted cone segment（10）Separate with gas-liquid and cover（13）It is embedded；Gas-liquid external spiral body（12）Bottom be provided with and supply lower drive shaft（17）Pass through
Center through hole, lower drive shaft（17）With the gas-liquid external spiral body（12）Bottom between pass through the first dynamic sealing（23）With
Two rolling bearings（22）Realize that rotary seal connects；The bottom of the gas-liquid external spiral body is provided with gas-liquid external spiral outage
（15）, the stage casing of the gas-liquid external spiral body is provided with gas-liquid external spiral shell outage（24）；
The gas-liquid external spiral body and lower casing（16）Between adopt thread connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072154.7A CN106640031B (en) | 2016-11-29 | 2016-11-29 | Gas extraction and injection separator for same underground well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072154.7A CN106640031B (en) | 2016-11-29 | 2016-11-29 | Gas extraction and injection separator for same underground well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106640031A true CN106640031A (en) | 2017-05-10 |
| CN106640031B CN106640031B (en) | 2023-02-14 |
Family
ID=58814381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611072154.7A Active CN106640031B (en) | 2016-11-29 | 2016-11-29 | Gas extraction and injection separator for same underground well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106640031B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317091A (en) * | 2017-12-27 | 2018-07-24 | 中国石油天然气股份有限公司 | The gas-liquid separation device and separation method of submersible electric pump |
| WO2019047873A1 (en) * | 2017-09-06 | 2019-03-14 | 刘书豪 | Fluid separating device, hoistway structure, and petroleum or natural gas production method |
| WO2019047872A1 (en) * | 2017-09-06 | 2019-03-14 | 刘书豪 | Fluid separating device, hoistway structure, and petroleum or natural gas production method |
| CN110939426A (en) * | 2019-11-19 | 2020-03-31 | 东北石油大学 | Centrifugal separation mechanism and co-well injection and production device using same |
| CN111691866A (en) * | 2020-07-06 | 2020-09-22 | 西安石油大学 | Intelligent underground gas-liquid separation device |
| CN112282676A (en) * | 2020-09-18 | 2021-01-29 | 中国石油大学(华东) | Downhole rotational flow solid-liquid separation drilling speed increasing tool |
| CN112647925A (en) * | 2020-12-21 | 2021-04-13 | 西安石油大学 | Intermittent reciprocating opening and closing liquid drainage nipple |
| CN113006766A (en) * | 2021-04-26 | 2021-06-22 | 东北石油大学 | Be applicable to downhole gas-liquid separation of shale oil pumping unit oil production system |
| CN113187460A (en) * | 2021-04-16 | 2021-07-30 | 东北石油大学 | Shale oil production underground rotational flow gravity coupling driving type gas-liquid separation device |
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| WO2019047873A1 (en) * | 2017-09-06 | 2019-03-14 | 刘书豪 | Fluid separating device, hoistway structure, and petroleum or natural gas production method |
| WO2019047872A1 (en) * | 2017-09-06 | 2019-03-14 | 刘书豪 | Fluid separating device, hoistway structure, and petroleum or natural gas production method |
| US11873706B2 (en) | 2017-09-06 | 2024-01-16 | Chengdu Bison Technology Co., Ltd. | Fluid separating device |
| CN108317091B (en) * | 2017-12-27 | 2020-01-07 | 中国石油天然气股份有限公司 | Gas-liquid separation device and separation method for submersible electric pump |
| CN108317091A (en) * | 2017-12-27 | 2018-07-24 | 中国石油天然气股份有限公司 | The gas-liquid separation device and separation method of submersible electric pump |
| CN110939426B (en) * | 2019-11-19 | 2021-09-28 | 东北石油大学 | Centrifugal separation mechanism and co-well injection and production device using same |
| CN110939426A (en) * | 2019-11-19 | 2020-03-31 | 东北石油大学 | Centrifugal separation mechanism and co-well injection and production device using same |
| CN111691866A (en) * | 2020-07-06 | 2020-09-22 | 西安石油大学 | Intelligent underground gas-liquid separation device |
| CN112282676A (en) * | 2020-09-18 | 2021-01-29 | 中国石油大学(华东) | Downhole rotational flow solid-liquid separation drilling speed increasing tool |
| CN112282676B (en) * | 2020-09-18 | 2022-10-14 | 中国石油大学(华东) | Downhole rotational flow solid-liquid separation drilling speed increasing tool |
| CN112647925B (en) * | 2020-12-21 | 2022-07-08 | 西安石油大学 | Intermittent reciprocating opening and closing liquid drainage nipple |
| CN112647925A (en) * | 2020-12-21 | 2021-04-13 | 西安石油大学 | Intermittent reciprocating opening and closing liquid drainage nipple |
| CN113187460A (en) * | 2021-04-16 | 2021-07-30 | 东北石油大学 | Shale oil production underground rotational flow gravity coupling driving type gas-liquid separation device |
| CN113187460B (en) * | 2021-04-16 | 2022-04-19 | 东北石油大学 | Shale oil production underground rotational flow gravity coupling driving type gas-liquid separation device |
| CN113006766A (en) * | 2021-04-26 | 2021-06-22 | 东北石油大学 | Be applicable to downhole gas-liquid separation of shale oil pumping unit oil production system |
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