CN103055549A - Bottom-drawing-in-type underground multistage oil-water separating device - Google Patents
Bottom-drawing-in-type underground multistage oil-water separating device Download PDFInfo
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Abstract
The invention discloses a bottom-drawing-in-type underground multistage oil-water separating device which is suitable for dual-packer underground oil-water separation same well extraction and injection tubular column structures. A bottom-drawing-in type is adopted for drawing an extraction liquid of an extraction layer to an absorption inlet of a dual-outer-shell electric submersible pump positioned on the upper part of the device through an annular hollow part of the device as well as other special flow passages; a crude oil liquid is pressurized by an electric submersible pump, bypasses a pump exhaust port and then returns to the device for oil-water separation; separated overflow liquid is directed exhausted to a casing pipe annulus directly; and a bottom flow liquid enters a water pouring oil pipe through an internal inserted tube, and the configuration of by-pass pipes is prevented; and the device internally comprise four hydrocyclones, through the structure design of special flow passages, the connection mode that every two are connected in parallel firstly and then connected in series is realized, and the separation efficiency and treatment capability of the underground oil-water separation device are improved.
Description
Technical field
The present invention relates to the oilfield exploitation technical field, is a kind of downhole oil-water separation device, especially a kind of bottom introduction-type down-hole multilevel oily-water seperating equipment.
Background technology
The downhole oil-water separation technology can effectively must solve the high moisture problems of bringing owing to oil well, this technology can realize in the down-hole Produced Liquid being carried out water-oil separating, with the isolated water filling layer of purifying waste water and being recycled into same well, only isolated enriched oil being lifted to ground, is a not only advantage technology of energy-conservation but also environmental protection.The core component of downhole oil-water separation technology is hydrocyclone, and Separating Performance in Hydrocyclone and disposal ability are the keys that the downhole oil-water separation technology is effectively implemented.Traditional downhole oil-water separation device has configured the downhole hydraulic cyclone of plural serial stage tandem type, although can satisfy to a certain extent the requirement of separative efficiency, but still have larger room for promotion, and have to configure bypass pipe for the connecting mode of realizing series connection, this measure so that system reliability greatly reduce.Feasible solution is to keep former coupled in series mode, introduces a plurality of small diameter hydraulic cyclones that are connected in parallel again and replace former single-stage major diameter hydrocyclone on the basis of coupled in series, namely adopts first and the connecting mode of rear string.The separating property of a plurality of small diameter hydraulic cyclone parallel operations is better than the single-stage major diameter hydrocyclone of equal disposal ability.For avoiding the use of bypass pipe, can consider to adopt on twin packer downhole oil-water separation tubular column structure basis the drainage scheme of bottom introduction-type.
Summary of the invention
For solving the down-hole single-stage or plural serial stage hydrocyclone efficient is low, the problem of bypass pipe poor reliability, the present invention proposes a kind of novel downhole oil-water separation device.Configured four hydrocyclones in this device, adopt in parallel first after the mode of series connection be divided into two groups, be respectively group and lower group, every group comprises two hydrocyclones that connect with parallel way, upper group and lower group is adopted series system to connect again.Parallel way refers to that liquid stream to be separated enters simultaneously two hydrocyclones and separates; Series system refers to that the underflow outlet of group hydrocyclone is communicated with the entrance of lower group hydrocyclone, and upper group underflow liquid enters Re-isolation in lower group.This device adopts the bottom of crude oil liquid to introduce mode, be that the crude oil liquid of extraction layer is incorporated into the annular space part this device from the bottom of this device, enter into Pump Suction Nozzle behind the annular space of this device of process and other special flow passage, again turn back to through the stream of the liquid after the pump supercharging and carry out water-oil separating in this device.
Down-hole multilevel oily-water seperating equipment of the present invention mainly comprises: be communicated with the top connection of double casing electric submersible pump suction inlet and outlet, upper case with top connection formation annular space runner, with entrance channel, the cross-channel body upper in parallel of overflow runner and crude oil liquid runner, the top hydrocyclone group in parallel that comprises two hydrocyclones, hydrocyclone group in parallel with top forms the middle housing of annular space runner, prevent the stay pipe of hydrocyclone unstability, the base for supporting of fixed support tube, upper positioning seat with crude oil liquid runner and center flow channels, with entrance channel, the cross-channel body lower in parallel of overflow runner and crude oil liquid runner, the circumscribed overflow oil nozzle that is easy to change, the bottom hydrocyclone group in parallel that comprises two hydrocyclones, hydrocyclone group in parallel with the bottom forms the lower case of annular space runner, with the lower positioning seat of crude oil liquid runner and center flow channels, with interior, outer tube cooperates the spigot joint that forms crude oil liquid runner and water filling runner.
The present invention is that the technical scheme that its technical problem of solution adopts is: the top connection end face is processed with the central circular flowing hole, is communicated with the outlet of double casing electric submersible pump, and nearly wall is processed with annular flowing hole, is communicated with the suction inlet of double casing electric submersible pump.Upper cross-channel body in parallel is processed with respectively two locating holes with the end face of lower cross-channel body in parallel, and each hydrocyclone respectively location and installation seals with locating hole coaxial cooperation and formation in locating hole; The inner facing cut of locating hole is flat, is used for the axial location of hydrocyclone, mills inner face after flat and is processed with spout hole with the locating hole concentric, and the overflow protruded tube coaxial cooperation of spout hole and hydrocyclone and forming seals; Spout hole is communicated with casing annulus by a radial hole again, thereby the overflowing liquid of hydrocyclone is caused casing annulus, formed the overflow runner, the radial hole exit is processed with the internal thread hydraulic fluid port, be connected with circumscribed overflow oil nozzle, circumscribed overflow oil nozzle is easy to change; Basis at locating hole processes eccentric circular hole, and eccentric circular hole is with respect to the eccentric axis of locating hole, and the inner face of eccentric circular hole flushes with the inner face of locating hole, and eccentric circular hole length adapts with hydrocyclone entrance size less than depth of positioning hole; Eccentric circular hole eccentric direction in two locating holes is relative, chooses suitable eccentric throw, diameter, guarantees that two eccentric circular holes can intersect, and intersection produces a flow-passing surface after intersecting, and this flow-passing surface area and inflow-rate of water turbine adapt; The other end of upper cross-channel body in parallel and lower cross-channel body in parallel is processed with respectively long flat flowing hole, through to two eccentric circular holes, thereby has got through the entrance channel of hydrocyclone group in parallel.Upper cross-channel body in parallel is processed with respectively straight-through looping pit with the nearly wall place of lower cross-channel body in parallel, is used for getting through the crude oil liquid runner.Upper positioning seat and lower positioning seat are the multidiameter shape, large axle head end face is processed with the underflow pipe locating hole of two hydrocyclones, and little axle head end face is processed with center hole, and the inner face in two holes overlaps and drills through, the center hole aperture is enough large, and the coincidence face of assurance reaches certain area of passage; Cascaded surface is processed with a plurality of straight-through circular holes, is used for getting through the crude oil liquid runner.Spigot joint is designed with two place's internal threads, is used for connecting inside and outside intubate, and extraction layer crude oil liquid enters into spigot joint by the annular space between the inside and outside intubate; The nearly wall of spigot joint place is drilled with looping pit, has been communicated with the straight-through circular hole of time positioning seat; The straight-through circular hole of lower positioning seat has been communicated with again the annular space between lower case and the bottom hydrocyclone group, this annular space again straight-through circular hole of the straight-through looping pit of the nearly wall by lower cross-channel body in parallel and upper positioning seat has been communicated with annular space between middle housing and the top waterpower a cluster cyclone, the straight-through looping pit of nearly wall by upper cross-channel body in parallel has been communicated with the annular space between upper case and the top connection again, then the suction inlet that has been communicated with the double casing electric submersible pump by the nearly wall circular hole of top connection has formed the crude oil liquid passage of extraction layer thus.
The invention has the beneficial effects as follows: can realize the parallel connection and serial connection work of multi-stage water power cyclone, promote separative efficiency and disposal ability, cooperate with inversion type electric pump unit to possess higher service behaviour; Overflowing liquid drains into casing annulus, by oil jacket annular space and the common lifting of oil pipe, has avoided the configuration of bypass pipe, and reliability is higher.
Description of drawings
Fig. 1 is apparatus of the present invention structural representations;
Fig. 2 is the connection diagrams of apparatus of the present invention in downhole oil-water separation injection-production system in same well;
Fig. 3 is the A-A cutaway view among Fig. 1;
Fig. 4 is the B-B cutaway view among Fig. 1;
Fig. 5 is the C-C cutaway view among Fig. 1;
Fig. 6 is the D-D cutaway view among Fig. 1;
Fig. 7 is the E-E cutaway view among Fig. 1;
Fig. 8 is the F-F cutaway view among Fig. 1.
In Fig. 1,1. top connection, 2. upper case, 3. go up cross-channel body in parallel, 4. circumscribed overflow oil nozzle, 5. top hydrocyclone group in parallel, 6. middle housing, 7. stay pipe, 8. base for supporting, 9. go up positioning seat, 10. time cross-channel body in parallel, 11. bottoms hydrocyclone group in parallel, 12. lower case, 13. lower positioning seat, 14. spigot joints, 15,16,17,18,19,20,21,22,23,24,25,26,27, the 28.O RunddichtringO.
In Fig. 2,29. lifting oil pipes, 30. cables, 31. high-voltage cable joints, 32. submersible electric machine with oils; 33. protector, 34. double casing electric submersible pumps, 35. interpolation pipes, 36. outer tubes, 37. insertion type sealing devices; 38.Y441 packer, 39. sliding sleeve switches, 40.Y341 packer, 41. water-filling oil pipes.
The specific embodiment
Fig. 1 is bottom introduction-type down-hole multilevel oily-water seperating equipment structural representation, and top connection (1) is connected with upper cross-channel body in parallel (3) by sealing thread, and upper case (2) is positioned between the two and forms coaxial cooperation, finishes the location after axially blocking; Middle housing (6) is connected by sealing thread with upper cross-channel body in parallel (3), lower cross-channel body in parallel (10); Four hydrocyclones are installed in respectively in the locating hole of cross-channel body in parallel (3) and lower cross-channel body in parallel (10), use respectively stay pipe (7) and base for supporting (8) to support, and use positioning seat (9), lower positioning seat (13) is finished the location; Lower case (12) uses sealing thread to be connected with lower cross-channel body in parallel (10), uses sealing thread to be connected with spigot joint (14); Circumscribed overflow oil nozzle (4) uses sealing thread to be installed in the external oil port of cross-channel body in parallel (3) and lower cross-channel body in parallel (10).
Fig. 2 is the connection diagrams of apparatus of the present invention in downhole oil-water separation injection-production system in same well; the electric pump unit adopts the inversion type connected mode, is followed successively by from top to bottom cable (30), high-voltage cable joint (31), submersible electric machine with oil (32), protector (33), double casing electric submersible pump (34).Top connection (1) is connected with double casing electric submersible pump (34) by flange; Interpolation pipe (35) is connected by sealing thread with spigot joint (14), and outer tube (36) is connected by tubing thread with spigot joint (14).
When system works, the highly aqueous liquid of extraction layer is through sliding sleeve switch (39), the annular space that interpolation pipe (35) and outer tube (36) consist of, enter into the crude oil liquid runner of spigot joint (14), upwards enter again the annular space runner of lower case (12) through the straight-through circular hole of lower positioning seat (13), continuation makes progress and enters into the annular space runner of middle housing (6) through the straight-through circular hole of the straight-through looping pit of lower cross-channel body in parallel (10) and upper positioning seat (9), then upwards enter into the annular space runner of upper case (2) through the straight-through looping pit of upper cross-channel body in parallel (3), the looping pit that passes through again top connection (1) enters into double casing electric submersible pump (34) and carries out supercharging, crude oil liquid after the supercharging is entered into the center hole of top connection (1) by pump discharge, cross-channel body in parallel (3) entrance channel enters into top hydrocyclone group in parallel (5) and separates on the process, liquid flow point after the separation is two parts: a part is the overflow mixed liquor, and the circumscribed overflow oil nozzle (4) of flowing through is expelled to the oil jacket annular space; Another part is the underflow mixed liquor, entered into the entrance channel of lower cross-channel body in parallel (10) by the center flow channels of upper positioning seat (9), then entering into bottom hydrocyclone group in parallel (11) separates, liquid stream after the separation also is divided into two parts: a part is the overflow mixed liquor, be expelled to the oil jacket annular space by circumscribed overflow oil nozzle (4), mix with the overflowing liquid of top hydrocyclone group in parallel (5), jointly be lifted to ground by casing annulus and lifting oil pipe (29); Another part is the underflow mixed liquor, enter into interpolation pipe (35) by the center flow channels of lower positioning seat (13) and the center flow channels of spigot joint (14), enter into water-filling oil pipe (41) through interpolation pipe (35), finally arrive the water filling layer, be injected in the stratum.
Claims (4)
1. bottom introduction-type down-hole multilevel oily-water seperating equipment, comprise top connection (1), upper case (2), upper cross-channel body in parallel (3), circumscribed overflow oil nozzle (4), top hydrocyclone group (5) in parallel, middle housing (6), stay pipe (7), base for supporting (8), upper positioning seat (9), lower cross-channel body in parallel (10), bottom hydrocyclone group (11) in parallel, lower case (12), lower positioning seat (13), spigot joint (14), it is characterized in that: top hydrocyclone group in parallel (5) comprises two hydrocyclones, and location and installation is in two locating holes of upper cross-channel body in parallel (5) respectively; Bottom hydrocyclone group in parallel (11) comprises two hydrocyclones, and location and installation is in two locating holes of lower cross-channel body in parallel (10) respectively.
2. bottom according to claim 1 introduction-type down-hole multilevel oily-water seperating equipment, it is characterized in that: two locating holes that are processed with of going up cross-channel body in parallel (3) and lower cross-channel body in parallel (10), be processed with eccentric circular hole in each locating hole, and two eccentric circular holes intersect formation one flow-passing surface; Be processed with spout hole in the locating hole of upper cross-channel body in parallel (3) and lower cross-channel body in parallel (10), spout hole is communicated with the oil jacket annular space by a radial hole, and the radial hole export processing has the screw thread hydraulic fluid port; The other end of upper cross-channel body in parallel (3) and lower cross-channel body in parallel (10) is processed with the flowing hole of a long flat pattern, and flowing hole is connected with two eccentric circular holes; The nearly wall place of upper cross-channel body in parallel (3) and lower cross-channel body in parallel (10) is processed with straight-through looping pit.
3. bottom according to claim 1 introduction-type down-hole multilevel oily-water seperating equipment, it is characterized in that: upper positioning seat (9) is the multidiameter shape with lower positioning seat (13), is processed with straight-through circular hole at cascaded surface; Upper positioning seat (9) is processed with two cyclone underflow pipe locating holes with lower positioning seat (13), and the other end is processed with center hole, and center hole is connected with two underflow pipe locating holes.
4. bottom according to claim 1 introduction-type down-hole multilevel oily-water seperating equipment, it is characterized in that: looping space between upper case (2) and the top connection (1), between middle housing (6) the hydrocyclone group in parallel with top (5), between lower case (12) the hydrocyclone group in parallel with the bottom (11), the clear opening by upper cross-channel body in parallel (3), upper positioning seat (9), lower cross-channel body in parallel (10) between each annular space interconnects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310024305.1A CN103055549B (en) | 2013-01-23 | 2013-01-23 | Introduction-type down-hole multilevel oily-water seperating equipment bottom one |
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| CN201310024305.1A CN103055549B (en) | 2013-01-23 | 2013-01-23 | Introduction-type down-hole multilevel oily-water seperating equipment bottom one |
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| CN103055549A true CN103055549A (en) | 2013-04-24 |
| CN103055549B CN103055549B (en) | 2016-08-17 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835693A (en) * | 2014-03-27 | 2014-06-04 | 中国石油大学(华东) | Instability prevention fine separation series type hydraulic cyclone oil-water separator |
| CN103835694A (en) * | 2014-03-27 | 2014-06-04 | 中国石油大学(华东) | Marine large-flow downhole oil-water separator with parallel type whirlcones |
| CN105435489A (en) * | 2015-11-10 | 2016-03-30 | 中国石油大学(华东) | Whirl enhanced vertical oil water separating device with micro-channels and method |
| CN106178605A (en) * | 2016-08-31 | 2016-12-07 | 吉林省万新科技有限公司 | A kind of kitchen special spiral type oil water separation device |
| CN106837291A (en) * | 2017-02-17 | 2017-06-13 | 中国石油大学(华东) | Oil jacket annular space gas-liquid separation device in non-conventional gas well head |
| CN107060724A (en) * | 2017-03-13 | 2017-08-18 | 中国石油大学(华东) | Oily-water seperating equipment under the screw bolt well of a kind of deep-well and high re-injection pressure well |
| CN107473329A (en) * | 2017-10-12 | 2017-12-15 | 大庆油田有限责任公司 | Underground three swirler separator |
| CN107575206A (en) * | 2017-10-17 | 2018-01-12 | 西南石油大学 | A kind of modularization sea bed gas hydrate underground separator |
| CN107762479A (en) * | 2017-10-17 | 2018-03-06 | 西南石油大学 | A kind of tandem sea-bottom shallow gas hydrates in-situ separating device |
| CN110168193A (en) * | 2017-01-11 | 2019-08-23 | 沙特阿拉伯石油公司 | Electric submersible pumping system with separator |
| CN110284870A (en) * | 2019-07-11 | 2019-09-27 | 闫波 | A kind of underground gas-liquid suitable for gas well divides device for picking |
| 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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Cited By (16)
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| CN103835694A (en) * | 2014-03-27 | 2014-06-04 | 中国石油大学(华东) | Marine large-flow downhole oil-water separator with parallel type whirlcones |
| CN103835694B (en) * | 2014-03-27 | 2017-02-15 | 中国石油大学(华东) | Marine large-flow downhole oil-water separator with parallel type whirlcones |
| CN103835693A (en) * | 2014-03-27 | 2014-06-04 | 中国石油大学(华东) | Instability prevention fine separation series type hydraulic cyclone oil-water separator |
| CN105435489A (en) * | 2015-11-10 | 2016-03-30 | 中国石油大学(华东) | Whirl enhanced vertical oil water separating device with micro-channels and method |
| CN105435489B (en) * | 2015-11-10 | 2019-05-14 | 中国石油大学(华东) | The vertical oily-water seperating equipment of swirl reinforced with microchannel and method |
| CN106178605A (en) * | 2016-08-31 | 2016-12-07 | 吉林省万新科技有限公司 | A kind of kitchen special spiral type oil water separation device |
| CN110168193B (en) * | 2017-01-11 | 2022-05-06 | 沙特阿拉伯石油公司 | Electric submersible pump system with separator |
| CN110168193A (en) * | 2017-01-11 | 2019-08-23 | 沙特阿拉伯石油公司 | Electric submersible pumping system with separator |
| CN106837291A (en) * | 2017-02-17 | 2017-06-13 | 中国石油大学(华东) | Oil jacket annular space gas-liquid separation device in non-conventional gas well head |
| CN107060724A (en) * | 2017-03-13 | 2017-08-18 | 中国石油大学(华东) | Oily-water seperating equipment under the screw bolt well of a kind of deep-well and high re-injection pressure well |
| CN107473329B (en) * | 2017-10-12 | 2020-08-14 | 大庆油田有限责任公司 | Underground three-stage cyclone separation device |
| CN107473329A (en) * | 2017-10-12 | 2017-12-15 | 大庆油田有限责任公司 | Underground three swirler separator |
| CN107575206A (en) * | 2017-10-17 | 2018-01-12 | 西南石油大学 | A kind of modularization sea bed gas hydrate underground separator |
| CN107762479A (en) * | 2017-10-17 | 2018-03-06 | 西南石油大学 | A kind of tandem sea-bottom shallow gas hydrates in-situ separating device |
| CN110284870A (en) * | 2019-07-11 | 2019-09-27 | 闫波 | A kind of underground gas-liquid suitable for gas well divides device for picking |
| 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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