CN102996103A - Co-well extracting-pouring device adopting downhole oil-water separation for large-dimension sleeve of offshore oil well - Google Patents
Co-well extracting-pouring device adopting downhole oil-water separation for large-dimension sleeve of offshore oil well Download PDFInfo
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- CN102996103A CN102996103A CN2012105316586A CN201210531658A CN102996103A CN 102996103 A CN102996103 A CN 102996103A CN 2012105316586 A CN2012105316586 A CN 2012105316586A CN 201210531658 A CN201210531658 A CN 201210531658A CN 102996103 A CN102996103 A CN 102996103A
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Abstract
The invention relates to the technical field of oilfield exploitation, and particularly relates to a co-well extracting-pouring device adopting downhole oil-water separation, wherein the device is especially suitable for oil wells with large-dimension (95/8 inches and above), and capable of realizing the simultaneous performance and mutual non-interference of oil extraction, separation and water pouring in the same well. A Y-shaped tubular column for downhole oil-water separation is simple in structure, convenient for the design of an interior flowing channel structure, convenient to install and operate, and high in reliability. A motor unit and a hoisting oil tube are arranged in parallel, a multistage cyclone is located on the lower parts of the motor unit and the hoisting oil tube, and a radial space is large, so that a large-diameter hydrocyclone can be configured, thus expanding the application range. An underflow fluid monitoring tube is arranged, an underflow injection fluid is guided to the ground during the running process of the unit, and the oily concentration of the underflow fluid is monitored in real time.
Description
Technical field
Patent of the present invention relates to the oilfield exploitation technical field, it is a kind of downhole oil-water separation same well production-injection device, this device can realize that oil recovery in the same oil well well, separation, three processes of water filling carry out and mutually noninterfere simultaneously, and the downhole oil-water separation same-well injection of high-water-cut oil-producing well of (95/8 cun of casing size and more than) is adopted to be specially adapted to possess the large scale mineshaft diameter in land or the marine oil field.
Background technology
With the exploitation of landing field and offshore oilfield, the height of Produced Liquid contains water problems and displays gradually, and height contains water problems and improved cost for oil production, has limited production scale, and environment has been caused many negative effects.The downhole oil-water separation technology can effectively must address these problems, this technology can be implemented in the down-hole Produced Liquid is 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 is lifted to ground, be an environmental protection, energy-conservation advantage technology.Yet, because the underground work inclement condition, the limiting factor such as bulk is limited so that the downhole oil-water separation technology between complexity and reliability, be difficult to accept or reject---too complicated structure is so that reliability reduces, and installs, operation easier is large; The related process flow process that can cause apparatus structure too simply again realizes can not be guaranteed, and separative efficiency is low.The present invention proposes a kind of downhole oil-water separation device that is applicable to sea or land large scale sleeve pipe (9 5/8 cun and more than), the apparatus structure connection and reasonable arrangement, and operational reliability is high, and operational monitoring is convenient, the multiple-stage separator series connection, separative efficiency is high.
Summary of the invention
The technical problem to be solved in the present invention is: the down-hole arrangement of electric pump unit, multistage cyclonic fluid separator, lifting tubing string, water injection string, underflow monitoring pipeline, the design of the connected mode between the each several part and inner flow passage structure.
The technical solution adopted in the present invention is:
As shown in Figure 1, apparatus of the present invention mainly are comprised of lifting oil pipe (1), underflow liquid monitoring pipe (2), electric pump unit (3), pump joint (4), threeway (5), oil water separator joint (6), multistage cyclonic fluid separator assembly (7), connected pipes (8), sealing intubate (9), insertion type sealing device (10), packer (11), water-filling oil pipe (12).Wherein, electric pump unit (3) is comprised of high voltage cable (13), motor (14), protector (15), kuppe (16), pump (17).
Lifting oil pipe among the present invention (1), electric pump unit (3), multistage cyclonic fluid separator assembly (7) are connected with threeway (5) respectively, four Y-shaped tubular column structures.Wherein, electric pump unit (3) is connected with threeway (5) by pump joint (4); Lifting oil pipe (1) is connected with threeway (5) by tubing thread, and lifting oil pipe (1) upwards extends to well head always; Multistage cyclonic fluid separator assembly (7) is connected with threeway (5) by oil water separator joint (6).
Threeway among the present invention (5) indoor design has two runners, is respectively: crude oil liquid runner and overflowing liquid runner.The crude oil liquid runner has been communicated with the entrance of pump discharge and Multi-stage spiral device; The overflowing liquid runner has been communicated with overfall and the lifting oil pipe (1) of Multi-stage spiral device.Liquid flows the flow process at the crude oil liquid runner: as shown in Figure 3, the liquid stream that filled arrows has represented the crude oil liquid runner flows to, enter into threeway (5) through the crude oil liquid after the pump supercharging through pump joint (4), then enter into the annular channel (shown in the D-D of Fig. 3 cross section) of oil water separator joint (6) downwards, finally enter into Multi-stage spiral device eliminator assembly (7).Liquid flows the flow process at the overflowing liquid runner: as shown in Figure 3, the liquid stream that hollow arrow has represented the overflowing liquid runner flows to, overflow concentrate process oil water separator joint (6) in the multistage cyclonic fluid separator assembly (7) enters into the central circular cross section runner (shown in Fig. 3 section A-A) of threeway (5), then upwards enters into lifting oil pipe (1).Crude oil liquid runner and overflowing liquid runner are separated, and by O type circle 1(B1), O type circle 2(B2), O type circle (B3) seals.
Multistage cyclonic fluid separator assembly (7) comprises hydrocyclone, housing, cross-channel body, bracing or strutting arrangement etc. among the present invention.Wherein, can dispose as required the multi-stage water power cyclone, the Multi-stage spiral device adopts and is connected in series mode, and namely certain one-level underflow opening links to each other with the next stage entrance; Housing and cross-channel body form the necessary runner of multistage cyclonic fluid separator (7) jointly.In the running, after crude oil liquid separated through the Multi-stage spiral device, overflowing liquid mixed liquor at different levels entered into the overflowing liquid runner of threeway (5), and underflow liquid enters into connected pipes (8).
As shown in Figure 1 and Figure 2, multistage cyclonic fluid separator assembly (7) bottom is connected pipes (8) and sealing intubate (9), connects by corresponding tubing thread between any two.Sealing intubate (9) external process has O RunddichtringO groove, and sealing intubate (9) is inserted in the insertion type sealing device (10), realizes sealing by O type circle.
Underflow liquid monitoring pipe (2) adopts corrosion-resistant and high-temperature resistant high-pressure hose or stainless steel tube among the present invention, upwards extend to well head always, the lower end has connected the underflow fairlead (shown in Fig. 2 partial enlarged drawing III) of multistage cyclonic fluid separator assembly (7), the underflow liquid runner that has been communicated with multistage cyclonic fluid separator assembly (7), underflow liquid can be directed to ground by underflow liquid monitoring pipe (2).
Novelty of the present invention and advantage:
1. for the large scale mineshaft diameter, the proposition of novelty downhole oil-water separation Y tube rod structure, adopt packer packing every extraction layer and water filling layer, tubular column structure is simple, fitting operation is convenient, the reliability height;
2. the Multi-stage spiral apparatus is positioned at the bottom of Y tube post, possesses enough radial space and disposes large diameter hydrocyclone, can adapt to the large oil well of output liquid measure;
3. in the unit running process, but the oil concentration by underflow liquid monitoring pipe Real-Time Monitoring underflow injection liquid helps to diagnose the Set under a well operation condition, thereby makes corresponding adjustment;
4. taken into full account the operability that tubing string is lowered to technique, tubing string the simple and reliable process such as is lowered to, sets, and consistent with relevant oil field common process, operation easier is little.
Description of drawings:
Fig. 1 is the equipments overall structure schematic diagram;
Fig. 2 is Y tube rod structure sectional view;
Fig. 3 is the threeway partial enlarged drawing;
Fig. 4 (a) is for setting, give up the head pipe post structural representation;
Fig. 4 (b) is for setting, give up rear tubular column structure schematic diagram;
Fig. 4 (c) is for being lowered to the tubular column structure schematic diagram behind the Y tube post.
In the drawings, 1. lifting oil pipe, 2. underflow liquid monitoring pipe, 3. electric pump unit, 4. pump joint, 5. threeway, 6. oil water separator joint, 7. multistage cyclonic fluid separator assembly, 8. connected pipes, 9. sealing intubate, 10. insertion type sealing device, 11. packers, 12. water-filling oil pipes, 13. cables, 14. motors, 15. protectors, 16. kuppes, 17. pumps.
The specific embodiment:
The workflow of apparatus of the present invention: after device is lowered in the well, the turn on pump operation.As shown by the arrows in Figure 1, the crude oil liquid of producing horizon enters into the pump (17) of electric pump unit (3) through casing annulus, enter into multistage cyclonic fluid separator assembly (7) through the crude oil liquid runner of threeway (5) after the supercharging and carry out water-oil separating, underflow liquid after the separation enters into water-filling oil pipe (12) through connected pipes (8), finally utilizes residual head to be injected into the water filling layer; Meanwhile the overflowing liquid of Multi-stage spiral device enters into lifting oil pipe (1) through threeway (5), utilizes residual head to be lifted to ground.In the device running, the underflow liquid of multistage cyclonic fluid separator assembly (7) can be directed to ground by underflow liquid monitoring pipe (2), the oil concentration of Real-Time Monitoring underflow liquid.In the device running, the injection of the lifting of the supercharging of crude oil liquid, separation, overflowing liquid, underflow liquid, five processes of the monitoring of underflow liquid can be carried out mutually noninterfere simultaneously.
Device is lowered to activities:
1. be lowered to the card sealing pipe column: the each several part of finishing the card sealing pipe column at well head connects, and from top to bottom is followed successively by: oil pipe, insertion type sealing device (10), packer (11), water-filling oil pipe (12) etc.After connection is finished, according to being lowered to technological requirement, will blocking sealing pipe column and be lowered to the precalculated position, shaft bottom.
2. hydraulic packer sets: set operation technological requirement according to hydraulic packer, finish packer setting;
3. give up: after packer setting is complete, in oil pipe, drop into steel ball, suppress to certain pressure and finish the technique of giving up, part card sealing pipe column is stayed the down-hole, another part is tripped out to ground, shown in Fig. 4 (b), stay the down-hole part and be followed successively by from top to bottom: insertion type sealing device (10), packer (11), water-filling oil pipe (12) etc.;
4. be lowered to the Y tube post: the connected mode of Y tube post from top to bottom is followed successively by as shown in Figure 2: lifting oil pipe (1), underflow liquid monitoring pipe (2), electric pump unit (3), pump joint (4), threeway (5), oil water separator joint (6), multistage cyclonic fluid separator assembly (7), connected pipes (8), sealing intubate (9).According to the relevant technological requirement that is lowered to, the Y tube post is lowered into the position of card sealing pipe column, make to seal intubate (9) and be inserted in the insertion type sealing device (10), device is lowered to complete.
Claims (5)
1. downhole oil-water separation same well production-injection device, formed by lifting oil pipe (1), underflow liquid monitoring pipe (2), electric pump unit (3), pump joint (4), threeway (5), oil water separator joint (6), multistage cyclonic fluid separator assembly (7), connected pipes (8), sealing intubate (9), insertion type sealing device (10), packer (11), water-filling oil pipe (12) etc., it is characterized in that overall tubing string is made of upper and lower two parts, top is divided into the Y tube post, and the bottom is divided into the card sealing pipe column.
2. downhole oil-water separation same well production-injection device according to claim 1, it is characterized in that lifting oil pipe (1), electric pump unit (3), threeway (4), the overall Y-shaped tubular column structure of multistage cyclonic fluid separator assembly (7), lifting oil pipe (1) is arranged along the pit shaft axially parallel with electric pump unit (3), multistage cyclonic fluid separator (7) is positioned at threeway (4) bottom, and the effect of connected node has been played in threeway (4).
3. downhole oil-water separation same well production-injection device according to claim 1 is characterized in that the Y tube post upper, and the card sealing pipe column is lower, and the Y tube post is connected by plugging together mode with the card sealing pipe column.
4. downhole oil-water separation same well production-injection device according to claim 1, it is characterized in that threeway (4) top has connected electric pump unit (3) and lifting oil pipe (1) side by side, the bottom has connected multistage cyclonic fluid separator assembly (7), threeway (5) is connected with pump (17) flange by pump joint (4), is connected with lifting oil pipe (1) by tubing thread.
5. downhole oil-water separation same well production-injection device according to claim 1 is characterized in that threeway (4) indoor design has crude oil liquid runner and overflowing liquid runner, and the crude oil liquid runner has been communicated with the entrance of pump discharge and multistage cyclonic fluid separator assembly (7); The overflowing liquid runner has been communicated with the overfall of lifting oil pipe (1) and multistage cyclonic fluid separator assembly (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105316586A CN102996103A (en) | 2012-12-12 | 2012-12-12 | Co-well extracting-pouring device adopting downhole oil-water separation for large-dimension sleeve of offshore oil well |
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| CN2012105316586A CN102996103A (en) | 2012-12-12 | 2012-12-12 | Co-well extracting-pouring device adopting downhole oil-water separation for large-dimension sleeve of offshore oil well |
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Cited By (8)
| 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 |
| CN107387031A (en) * | 2017-08-21 | 2017-11-24 | 宁波修远机电有限公司 | A kind of single-well injection-production pump group |
| CN107473329A (en) * | 2017-10-12 | 2017-12-15 | 大庆油田有限责任公司 | Underground three swirler separator |
| CN107558931A (en) * | 2016-07-01 | 2018-01-09 | 中国石油化工股份有限公司 | A kind of full pit shaft Gravity Separation sucker rod pump same well production-injection method and process pipe string |
| CN108894767A (en) * | 2018-06-14 | 2018-11-27 | 中国海洋石油集团有限公司 | A kind of upward suspension type downhole oil-water separation tubing string |
| CN109252853A (en) * | 2017-07-12 | 2019-01-22 | 中国石油天然气股份有限公司 | A kind of downhole oil-water separation single-well injection-production system and method |
| CN109296351A (en) * | 2018-12-10 | 2019-02-01 | 胜利油田胜利泵业有限责任公司 | A kind of application submersible electric pump same well production-injection aqueous vapor isolation technics |
| 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 |
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| CN2627213Y (en) * | 2002-10-23 | 2004-07-21 | 李增亮 | Down-hole inverted power-driven oil-submersible centrifugal pump water-oil separating extraction and injection apparatus |
| CN202165055U (en) * | 2011-01-17 | 2012-03-14 | 中国石油大学(华东) | Same-well underground oil-water separating extraction and injection device with surface driving single-screw pump |
| CN202300333U (en) * | 2011-10-10 | 2012-07-04 | 中国石油大学(华东) | Underground oil-water separating and same-well extracting and injecting device utilizing electric submersible screw pump |
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Cited By (12)
| 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 |
| CN107558931A (en) * | 2016-07-01 | 2018-01-09 | 中国石油化工股份有限公司 | A kind of full pit shaft Gravity Separation sucker rod pump same well production-injection method and process pipe string |
| CN107558931B (en) * | 2016-07-01 | 2019-02-26 | 中国石油化工股份有限公司 | A kind of full pit shaft Gravity Separation sucker rod pump same well production-injection method and process pipe string |
| CN109252853A (en) * | 2017-07-12 | 2019-01-22 | 中国石油天然气股份有限公司 | A kind of downhole oil-water separation single-well injection-production system and method |
| CN107387031A (en) * | 2017-08-21 | 2017-11-24 | 宁波修远机电有限公司 | A kind of single-well injection-production pump group |
| CN107473329A (en) * | 2017-10-12 | 2017-12-15 | 大庆油田有限责任公司 | Underground three swirler separator |
| CN107473329B (en) * | 2017-10-12 | 2020-08-14 | 大庆油田有限责任公司 | Underground three-stage cyclone separation device |
| CN108894767A (en) * | 2018-06-14 | 2018-11-27 | 中国海洋石油集团有限公司 | A kind of upward suspension type downhole oil-water separation tubing string |
| CN108894767B (en) * | 2018-06-14 | 2020-12-04 | 中国海洋石油集团有限公司 | Upward suspension type underground oil-water separation tubular column |
| CN109296351A (en) * | 2018-12-10 | 2019-02-01 | 胜利油田胜利泵业有限责任公司 | A kind of application submersible electric pump same well production-injection aqueous vapor isolation technics |
| CN109296351B (en) * | 2018-12-10 | 2021-09-17 | 胜利油田胜利泵业有限责任公司 | Water-gas separation system for extraction and injection in same well by using electric submersible pump |
| 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 |
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