CN103362490A - Production-injection device for downhole oil-water separation - Google Patents
Production-injection device for downhole oil-water separation Download PDFInfo
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- CN103362490A CN103362490A CN2012100954345A CN201210095434A CN103362490A CN 103362490 A CN103362490 A CN 103362490A CN 2012100954345 A CN2012100954345 A CN 2012100954345A CN 201210095434 A CN201210095434 A CN 201210095434A CN 103362490 A CN103362490 A CN 103362490A
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Abstract
The invention discloses a production-injection device for downhole oil-water separation, and mainly solves the problem that domestic and overseas offshore oilfields are large in oil-water separation treatment amount and limited in platform treatment space at the present stage. The production-injection device is characterized by an oil-water separation structure, dual-stage swirlers are serially connected in a casing, and each swirler comprises a plurality of swirlers which are parallelly connected from top to bottom. In the whole device, a power portion comprises a motor, a high-voltage cable joint and a cable. A pressurizing portion comprises a pump which can be an electric submersible centrifugal pump. An oil-water separation portion comprises a primary cyclone separator, a secondary cyclone separator, a packer, an outer bypass pipe and the like. Production and injection in the same well of an offshore oilfield can be realized by separating offshore oilfield downhole oil-water mixed liquor, reinjecting separated water to a water injection layer and lifting separated oil to the ground. The production-injection device has the advantages that the treatment amount of the oil-water mixed liquor of an offshore platform is decreased, oil production cost is reduced, economic benefit is improved and the like.
Description
Technical field
The present invention relates to a kind of oil-moisture for down-hole oil production from adopting dispensing device, belong to the oil exploration equipment technical field.
Technical background
Along with continually developing of offshore oilfield, the water content of oil well rises gradually.For keeping output, have to adopt the way that improves lifting rate to delay the speed that oil production is successively decreased.At present, the most of block of offshore oilfield down-hole production fluid is moisture up to 80% ~ 95%, and these production fluids enter into next step operation after need processing through the surface water.Following problems appears in the further increase along with water content: the one, and the fluid of the large flow of lifting need to increase larger power of motor, expends more electric energy; The 2nd increase owing to giving rise to the fluid water content on ground, water treatment technology becomes increasingly complex, facility is more and more huger, cost is more and more higher, aggravated ground particularly original space with regard to the little contradiction in the space of limited offshore platform.
Above-mentioned factor has all caused the rising of oil field development cost, the decline of economic benefit.
Summary of the invention
In order to guarantee finishing of offshore oilfield production task, reduce the oil field development cost, increase economic efficiency, need a kind of device of exploitation, oil-water is separated in the down-hole, the water after the separation is recycled into the water filling layer, and the oil after the separation is given rise to ground.Multi-grade oil-moisture that this device that is installed in the down-hole need to increase in parallel and series connection on the basis of electric submersible pump device guarantees treating capacity and separative efficiency from cyclone.
The invention provides a kind of oil-moisture for down-hole oil production from adopting dispensing device.This device can make the oil of the extraction layer of large flow-water mixed liquid through after pressurization, separating, and water is recycled into the water filling layer, and oil is given rise to ground through bypass pipe, oil pipe.
The application of this device has greatly reduced the treating capacity of offshore platform oil-water mixed liquid, has reached Cost reduction, the purpose of increasing economic efficiency.
The technical solution adopted for the present invention to solve the technical problems is
The oil of water after offshore oilfield downhole oil-water mixed liquid, the re-injection of this device by separating large flow separates after water filling layer, the lifting separation realizes that to ground the offshore oilfield same-well injection adopts.Put it briefly, after this device can make the oil of the extraction layer of large flow-water mixed liquid through the pump pressurization, enter twin-stage parallel connection rotational flow eliminator and separate, the mixed liquor that the water content after the separation is higher is recycled into the water filling layer, and rich oil liquid is given rise to ground through bypass pipe, oil pipe.
Concrete steps are
According to process pipe string figure, scheme one: oil pipe, cable, high-voltage cable joint, upper control valve, upper one way valve, expansion loop, motor, protector, intake, pump, twin-stage cyclone separator, lower one way valve, packer, lower control valve, outer bypass pipe and each segmentation oil pipe are in turn connected into process pipe string from top to bottom; Scheme two: oil pipe, cable, high-voltage cable joint, upper control valve, upper one way valve, outer bypass pipe, twin-stage cyclone separator, pump, intake, protector, motor, sealing steel cage, lower one way valve, packer, lower control valve and each segmentation oil pipe are in turn connected into process pipe string from top to bottom.Wherein, power section is comprised of motor, high-voltage cable joint and cable; The supercharging part is comprised of pump, and it can be electric submersible centrifugal pump, is connected to power section by flange; Oil-moisture comprises first order cyclone separator, second level cyclone separator, packer, outer bypass pipe etc. from part, connects successively from top to bottom, is installed in supercharging part below, and partly is connected with supercharging with flange; Control section is comprised of upper and lower control valve and one way valve, adjusting device oil, water out back pressure, and package unit is installed in the sleeve pipe.
The invention has the beneficial effects as follows
Mode by twin-stage cyclone series connection, cyclone parallel connection at the same level is separated the oil of the large flow of offshore oilfield-water mixing Produced Liquid in the down-hole, water after the separation is recycled into the water filling layer, oil after the separation is given rise to ground, greatly reduced the treating capacity of offshore platform oil-water mixed liquid, reached Cost reduction, the purpose of increasing economic efficiency.
Description of drawings
Fig. 1 is that the oil-moisture that is used for down-hole oil production that proposes of the present invention is from the scheme that pours down (scheme one) of the adopting structural representation of adopting dispensing device.
Fig. 2 is that oil-moisture shown in Figure 1 is from the structural representation of adopting twin-stage cyclone in the dispensing device.
Fig. 3 is the oil-moisture that is used for down-hole oil production that proposes of the present invention from adopting adopting of dispensing device upper scheme (scheme two) structural representation of making a bet.
Fig. 4 (cyclone formal dress), Fig. 5 (cyclone upside-down mounting) are that oil-moisture shown in Figure 4 is from the structural representation of adopting twin-stage cyclone in the dispensing device.
Fig. 1; Fig. 2; Fig. 3; Fig. 4; among Fig. 5,1. oil pipe, 2. cable; 3. go up control valve, 4. go up one way valve, 5. plug; 6. expansion loop, 7. motor, 8. protector; 9. outer bypass pipe, 10. intake, 11. pumps; 12. twin-stage cyclone entrance, 13. twin-stage cyclones, the outlet of 14. twin-stage cyclones; 15. lower one way valve, 16. packers, 17. times control valves; 18. sleeve pipe, 19. upper cover plates, the outlet of 20. cyclone bleed off pipes; 21. first order cyclone, 22. inner bypass pipes, the outlet of 23. cyclone underflow pipes; 24. first; the second cyclone outlet, 25. dividing plates, 26. second level cyclones; 27. special fit, 28. lower covers, 29. sealing steel cages.
The specific embodiment
As pouring down on Fig. 1 adopts shown in the scheme: the oil-water mixed liquid of producing horizon extraction flows by the diagram direction of arrow, through intake (10), enter pump (11), mixed liquor is after the pump supercharging, enter oil-water separator (13) external oil pipe cavity, enter again the eddy flow chamber of cyclone, mixed liquor is through the effect of twin-stage cyclone, rich oil liquid flows according to the diagram direction of arrow, enter outer bypass pipe (9), after arriving the top oil pipe, the upper one way valve (4) of flowing through, upper control valve (3) are given rise to ground at last; A part of mixed liquor that water content is higher flows according to the diagram direction of arrow, and the lower one way valve (15) of flowing through, packer (16), lower control valve (17) are injected into the water filling layer at last.
Such as Fig. 2, Fig. 4, shown in Figure 5: mixed liquor shown in arrow, by twin-stage cyclone entrance (12), enters first order cyclone outer sleeve cavity after the pump pressurization.Mixed liquor separates according to entering first order cyclone (21) shown in the arrow, rich oil liquid is according to shown in the arrow after separating, enter inner bypass pipe (22) through cyclone bleed off pipe outlet (20), the higher production fluid of water content enters first order cyclone outlet (24) according to shown in the arrow through cyclone underflow pipe outlet (23); According to the arrow direction indication, the mixed liquor higher from the isolated water content of first order cyclone separator flow into second level cyclone outer sleeve cavity from first order cyclone outlet (24), mixed liquor separates according to entering second level cyclone (26) shown in the arrow, rich oil liquid is according to shown in the arrow after separating, enter inner bypass pipe (22) through cyclone bleed off pipe outlet (20), the higher production fluid of water content is according to shown in the arrow, enter twin-stage cyclone outlet (14) through second level cyclone outlet (24), flow out at last the rotational flow separation part, and flow to the water filling layer.
The energy of supercharging part is provided by power section motor (7) in the diagram, and it drives single pump work.Hermetic unit is by Fig. 1 protector (8), packer (16), and Fig. 2 upper cover plate (19), dividing plate (25), special fit (27), lower cover (28), sealing steel cage (29) form.
Adopt such as Fig. 3 and to make a bet shown in the upper scheme: the oil-water mixed liquid of producing horizon extraction flows by the diagram direction of arrow, through lower one way valve (15), packer (16), lower control valve (17), intake (10), enter pump (11), mixed liquor is after the pump supercharging, enter oil-water separator (13) outer sleeve cavity, enter again the eddy flow chamber of cyclone, mixed liquor is through the effect of twin-stage cyclone, rich oil liquid flows according to the diagram direction of arrow, enter outer bypass pipe (9), after arriving the top oil pipe, the upper one way valve (4) of flowing through, upper control valve (3) is given rise to ground at last; A part of mixed liquor that water content is higher flows according to the diagram direction of arrow, through twin-stage cyclone outlet (14), is injected at last the water filling layer.
Claims (10)
1. an oil-moisture that is used for down-hole oil production is from adopting dispensing device, adopt the scheme of pouring down by oil pipe, cable, high-voltage cable joint, upper control valve, upper one way valve, expansion loop, motor, protector, intake, pump, twin-stage cyclone separator, lower one way valve, packer, lower control valve, outer bypass pipe from top to bottom, adopt flange (or screw thread) to be formed by connecting, be installed in the sleeve pipe; Adopt and make a bet upper scheme by oil pipe, cable, high-voltage cable joint, upper control valve, upper one way valve, outer bypass pipe, twin-stage cyclone separator, pump, intake, protector, motor, sealing steel cage, lower one way valve, packer, lower control valve from top to bottom; adopt flange (or screw thread) to be formed by connecting, be installed in the sleeve pipe.
2. oil-the moisture for down-hole oil production according to claim 1 is from adopting dispensing device, and it is characterized in that: adopt single pump list electric machine structure, pump is used for to the supercharging of oil reservoir production fluid, and then provides energy for the water that is recycled into the stratum and the oil that gives rise to ground.
3. oil-the moisture for down-hole oil production according to claim 1 is characterized in that from adopting dispensing device: first order cyclone adopts the cyclone parallel-connection structure; First order cyclone is lined up perpendicular row and is placed in the sleeve pipe, the top overfall is connected on the inner bypass pipe by adapter, inner bypass pipe is as the passing away of rich oil liquid, in adopting the scheme of pouring down, link to each other with the sleeve pipe upper cover plate, pass the dividing plate eccentric orfice in the scheme on making a bet and link to each other with sleeve pipe lower cover and special fit adopting; The bottom overfall is connected to the outlet of first order cyclone by adapter, and the outlet of first order cyclone communicates with another eccentric through-hole of sleeve pipe intermediate membrane as the passing away of water content higher position reason liquid; Inner bypass pipe, first order cyclone outlet arranged off-centre.
4. oil-the moisture for down-hole oil production according to claim 1 is characterized in that from adopting dispensing device: second level cyclone adopts the cyclone parallel-connection structure; Second level cyclone is lined up perpendicular row and is placed in the sleeve pipe, and the top overfall is connected on the inner bypass pipe by adapter, and inner bypass pipe passes from the dividing plate eccentric orfice as the passing away of rich oil liquid; The bottom overfall is connected to second level cyclone outlet by adapter, and cyclone outlet in the second level communicates with sleeve pipe bottom lower cover as the passing away of the higher treatment fluid of water content; Inner bypass pipe, second level cyclone outlet arranged off-centre.
5. oil-the moisture for down-hole oil production according to claim 1 is from adopting dispensing device, and it is characterized in that: first and second grade cyclone is installed in the sleeve pipe, middlely separates with dividing plate, and an inner bypass pipe passes this dividing plate; The underflow pipe of every grade of nethermost cyclone is connected to outlet upward or is connected to (example is connected on dividing plate and the lower cover as shown in Figure 4, is connected in the outlet shown in the accompanying drawing 5) on dividing plate and the lower cover; The sleeve pipe intermediate membrane is left three eccentric orfices (be connected to the outlet scheme and open two eccentric orfices), gets in touch with, subordinate's cyclone.
6. first order cyclone according to claim 3, it is characterized in that: cover closure is used on sleeve pipe top, the upper cover plate center is opened Kong Bingyu twin-stage cyclone entrance and is communicated, twin-stage cyclone entrance communicates with pump discharge again, producing horizon well liquid pressurizes by pump, the twin-stage cyclone entrance of flowing through enters into airtight sleeve pipe chamber, flows into cyclone by eddy flow chamber entrance again and separates; In adopting the scheme of pouring down, sleeve pipe upper cover plate eccentric position is opened the hole and is linked to each other with inner bypass pipe, and rich oil liquid is bypass pipe outside this passage flows into; Adopt make a bet in the scheme, the sleeve pipe lower cover is opened the hole with the special fit eccentric position and is linked to each other with inner bypass pipe, contains rich oil liquid bypass pipe outside this passage flows into; One of sleeve pipe intermediate membrane eccentric through-hole communicates with the outlet of first order cyclone, two passed by inner bypass pipe, three (being connected to the outlet scheme without this hole) communicate with the underflow pipe of the nethermost cyclone of the first order, flow through this passage of the treatment fluid that water content is higher flows into second level cyclone.
7. the second level according to claim 4 cyclone, it is characterized in that: the sleeve pipe bottom is sealed with lower cover and special union, the intermediate membrane eccentric through-hole communicates with the outlet of first order cyclone and underflow pipe, the treatment fluid that first order water content is higher flows into airtight sleeve pipe chamber by the dividing plate eccentric through-hole, flows into cyclone by eddy flow chamber entrance again and separates; Another eccentric through-hole of dividing plate runs through first and second grade cyclone sleeve pipe chamber with inner bypass pipe, and rich oil liquid is bypass pipe outside this passage flows into; Pour down scheme middle sleeve bottom lower cover and open two eccentric orfices (being connected to the outlet scheme without second hole) adopting, one communicates with the outlet of second level cyclone, it two communicates with the underflow pipe of the bottom cyclone in the second level, a centre bore is opened in the lower end of union, connect with two holes, top, and communicate with twin-stage cyclone outlet, the treatment fluid that water content is higher this passage of flowing through finally is injected into the water filling layer; Adopt make a bet on scheme middle sleeve bottom lower cover open three eccentric orfices (being connected to the outlet scheme without second hole), the outlet of one and second level cyclone links to each other, it two links to each other with the underflow pipe of bottom, second level cyclone, it three is passed by inner bypass pipe; Union leaves a centre bore and an eccentric orfice, and centre bore and two holes, top connect, and communicates with the outlet of twin-stage cyclone, and the treatment fluid that water content is higher this passage of flowing through finally is injected into the water filling layer; Eccentric orfice links to each other with inner bypass pipe, and rich oil liquid is bypass pipe outside this passage flows into.
According to claim 1 for downhole oil-moisture from adopt dispensing device, it is characterized in that: outer bypass pipe lower end communicates with inner bypass pipe, the upper end links to each other with sleeve pipe, and the rich oil liquid after separating through the twin-stage cyclone flows to oil pipe through this passage, is given rise to ground.
9. oil-the moisture for down-hole oil production according to claim 1 is from adopting dispensing device; it is characterized in that: adopt make a bet in the scheme; motor, protector, intake are sealed in the steel cage, and the sealing steel cage is used for separating oil reservoir production fluid and the higher treatment fluid of water content.
10. oil-the moisture for down-hole oil production according to claim 1 is characterized in that from adopting dispensing device: adopt make a bet in the scheme, perforate on the twin-stage cyclone outlet tube wall is used for discharging the higher treatment fluid of water content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100954345A CN103362490A (en) | 2012-04-01 | 2012-04-01 | Production-injection device for downhole oil-water separation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100954345A CN103362490A (en) | 2012-04-01 | 2012-04-01 | Production-injection device for downhole oil-water separation |
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| CN103362490A true CN103362490A (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100954345A Pending CN103362490A (en) | 2012-04-01 | 2012-04-01 | Production-injection device for downhole oil-water separation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821494A (en) * | 2014-03-15 | 2014-05-28 | 中国石油大学(华东) | Large-flow offshore downhole oil-water separator provided with lifting tubing |
| CN104389578A (en) * | 2014-12-05 | 2015-03-04 | 北京化工大学 | Offshore large-displacement downhole oil-water separation device with chemical agent injection function |
| CN106884641A (en) * | 2017-03-13 | 2017-06-23 | 中国石油大学(华东) | A kind of screw-pump downhole oil-water separation device of the double runner layout of single suction |
| CN107740685A (en) * | 2017-09-30 | 2018-02-27 | 中国海洋石油总公司 | It is a kind of with adopted under submersible electric pump it is upper note completion flow string |
| CN110617063A (en) * | 2019-11-10 | 2019-12-27 | 夏惠芬 | Deep well casing external annulus two-stage monitoring sampler and monitoring method thereof |
| CN112240193A (en) * | 2020-11-17 | 2021-01-19 | 东北石油大学 | Multistage oil-water separation and same-well injection-production device in horizontal shaft |
| CN114991741A (en) * | 2022-05-16 | 2022-09-02 | 东北石油大学 | Natural gas hydrate separation device and method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821494A (en) * | 2014-03-15 | 2014-05-28 | 中国石油大学(华东) | Large-flow offshore downhole oil-water separator provided with lifting tubing |
| CN104389578A (en) * | 2014-12-05 | 2015-03-04 | 北京化工大学 | Offshore large-displacement downhole oil-water separation device with chemical agent injection function |
| CN106884641A (en) * | 2017-03-13 | 2017-06-23 | 中国石油大学(华东) | A kind of screw-pump downhole oil-water separation device of the double runner layout of single suction |
| CN106884641B (en) * | 2017-03-13 | 2019-04-09 | 中国石油大学(华东) | A kind of screw-pump downhole oil-water separation device of the double runner layout of single suction |
| CN107740685A (en) * | 2017-09-30 | 2018-02-27 | 中国海洋石油总公司 | It is a kind of with adopted under submersible electric pump it is upper note completion flow string |
| CN110617063A (en) * | 2019-11-10 | 2019-12-27 | 夏惠芬 | Deep well casing external annulus two-stage monitoring sampler and monitoring method thereof |
| CN110617063B (en) * | 2019-11-10 | 2024-01-05 | 宝鸡市凯顺海陆装备科技有限公司 | Deep well sleeve outer annular space two-stage monitoring sampler and monitoring method thereof |
| CN112240193A (en) * | 2020-11-17 | 2021-01-19 | 东北石油大学 | Multistage oil-water separation and same-well injection-production device in horizontal shaft |
| CN114991741A (en) * | 2022-05-16 | 2022-09-02 | 东北石油大学 | Natural gas hydrate separation device and method |
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Application publication date: 20131023 |