CN104165043B - Two-tube constant current divides water controller - Google Patents
Two-tube constant current divides water controller Download PDFInfo
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- CN104165043B CN104165043B CN201310184432.8A CN201310184432A CN104165043B CN 104165043 B CN104165043 B CN 104165043B CN 201310184432 A CN201310184432 A CN 201310184432A CN 104165043 B CN104165043 B CN 104165043B
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- central tube
- inner central
- water
- tube
- decompressor
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Abstract
The present invention provides a kind of two-tube constant current to divide water controller, this control device includes inner central tube and is enclosed within the adapter sleeve outside inner central tube, point water seating nipple, described it be vertically connected with adapter sleeve together and point between water seating nipple and inner central tube, form annular space, described point of water seating nipple is internally provided with decompressor, described inner central tube offers for connecting decompressor and the through hole of inner central tube inner chamber.Described decompressor includes the relief pressure valve cartridge in valve pocket and decompression valve pocket that reduces pressure, and connects decompression piston by relief spring, offer water nozzle below described decompressor below relief pressure valve cartridge.The present invention is possible not only to improve interval qualification rate, it is achieved stablizes water filling, and adjusts without surveying, it is achieved that the purpose of big pressure reduction water injection well dispensing two-layer, reaches the requirement of separate mass and separate pressure water filling.
Description
Technical field
The present invention relates to point water controller of big pressure reduction oil reservoir seperated layer water injection, particularly relate to a kind of two-tube constant current and divide water controller.
Background technology
In oil reservoir with multiple series of strata, seperated layer water injection is oil field retentively stressor layer, the important means improving oil recovery factor.Layered waterflooding quantity is mainly controlled by downhole water flow regulator.The most conventional hollow and eccentric injection mandrel uses down-hole to fix water nozzle and once throttles, the influence of fluctuations that is stressed is bigger, need that water injection well periodically carries out zonal testing, regular pulling water distributor core changes water nozzle, not only survey and adjust workload greatly but also to be difficult to control to, when especially using water nozzle to carry out zonal flow rate allotment with the water injection well more than 10MPa of the interlayer difference in well, owing to water nozzle chock pressure difference is limited, it is difficulty with two-layer water injection rate the most qualified, meets each layer injection allocation simultaneously.Adding up according to investigations, current Shengli Oil Field interlayer difference there are about more than 400 mouthfuls at the big pressure reduction water injection well of more than 10MPa, and along with the needs of oil field fine development, this fractional water flooding well quantity also can increase considerably, and big pressure reduction water injection well is needed badly and carried out seperated layer water injection.In order to solve the problem of big pressure reduction oil reservoir seperated layer water injection, we, from the thinking of the corresponding water filling layer of a flood pattern, develop two-tube constant current and divide water controller.
Summary of the invention
It is an object of the invention to provide a kind of two-tube constant current and divide water controller, fix water nozzle by down-hole to throttle and differential balance pressure regulator valve, make two-tube constant current divide water controller to import and export water quantity holding constant, be possible not only to improve interval qualification rate, realize stablizing water filling, and adjust without surveying.Achieve the purpose of big pressure reduction water injection well dispensing two-layer, reach the requirement of separate mass and separate pressure water filling.
The purpose of the present invention can be achieved by the following technical measures:
This two-tube constant current divides water controller include inner central tube and be enclosed within the adapter sleeve outside inner central tube, point water seating nipple, described it be vertically connected with adapter sleeve together and point between water seating nipple and inner central tube, form annular space, described point of water seating nipple is internally provided with decompressor, described inner central tube offers for connecting decompressor and the through hole of inner central tube inner chamber.
The purpose of the present invention realizes also by following technical measures:
Described decompressor includes the relief pressure valve cartridge in valve pocket and decompression valve pocket that reduces pressure, and connects decompression piston by relief spring, offer water nozzle below described decompressor below relief pressure valve cartridge；Described adapter sleeve upper end is provided with gear cap, and upper gear cap upper end connects outer tube top connection, and described adapter sleeve lower end connects baffle ring, and baffle ring lower end is connected with a point water seating nipple, is cased with spring outside the adapter sleeve between described upper gear cap and baffle ring；Described inner central tube is divided into the upper inner central tube being vertically connected with and lower inner central tube, and upper inner central tube upper end connects inner tube top connection, and lower inner central tube lower end connects inner tube flushing valve；Described point of water seating nipple lower end connects lower contact, and described lower contact epimere inwall is sealed with inner central tube outer wall to be connected；Described lower contact lower end is sequentially connected with packer, injection well downhole flow regulator, outer tube flushing valve.
The method have the advantages that
1, two waterflood paths are formed in down-hole, it is achieved the big water injection well separate mass and separate pressure water filling of same water injection well interlayer difference；
2, two-tube constant current divides water controller to pass through decompression piston, it is achieved when water injection pressure changes in certain pressure differential range, imports and exports flow and is not remained to keep constant flow by system pressure influence of fluctuations, it is achieved stablizes water filling；
3, waterflood path is designed as ball-and-seat structure, has anti-returning and tells function；
4, during water filling, adapter sleeve is up, compression spring, has waterflood path and helps out effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
In figure: 1-inner tube top connection；2-outer tube top connection；Cap is kept off on 3-；4-spring；5-adapter sleeve, 6-baffle ring；The upper inner central tube of 7-；8-divides water seating nipple；9-relief pressure valve cartridge；10-reduces pressure valve pocket；11-relief spring；12-decompression piston；13-water nozzle；14-lower contact；Inner central tube under 15-.
Detailed description of the invention
Referring to the drawings: this two-tube constant current divides water controller include inner central tube and be enclosed within the adapter sleeve 5 outside inner central tube, point water seating nipple 8, described it be vertically connected with adapter sleeve together and point between water seating nipple and inner central tube, form annular space, described point of water seating nipple is internally provided with decompressor, described inner central tube offers for connecting decompressor and the through hole of inner central tube inner chamber.Described decompressor includes the relief pressure valve cartridge 9 in valve pocket 10 and decompression valve pocket that reduces pressure, and connects decompression piston 12 by relief spring 11, offer water nozzle 13 below described decompressor below relief pressure valve cartridge.Described adapter sleeve upper end is provided with gear cap 3, and upper gear cap upper end connects outer tube top connection 2, and described adapter sleeve lower end connects baffle ring 6, and baffle ring lower end is connected with a point water seating nipple, is cased with spring 4 outside the adapter sleeve between described upper gear cap and baffle ring.
Described inner central tube is divided into the upper inner central tube 7 being vertically connected with and lower inner central tube 15, and upper inner central tube upper end connects inner tube top connection 1, and lower inner central tube lower end connects inner tube flushing valve.Described point of water seating nipple lower end connects lower contact 14, and described lower contact epimere inwall is sealed with inner central tube outer wall to be connected.
Well head uses four-way junction of casing and two little four-way connected modes.Hanger is seated in big four and connects 31/2TBG or 27/8TBG oil pipe.Middle little four-way connects 1.900TBG oil pipe.Each laminar flow amount is controlled by ground flow regulator.Such as Fig. 1, when going into the well, two-tube constant current divides water controller to be used in combination with inner and outer pipe, packer, injection well downhole flow regulator, it is specially, inner tube top connection upper end connects inner tube, outer tube top connection upper end connects outer tube, lower contact 14 lower end is sequentially connected with packer, injection well downhole flow regulator, outer tube flushing valve, and lower inner central tube lower end connects inner tube flushing valve.Inner and outer pipe, packer, two-tube point of discharge control dress and down-hole string are separated into two waterflood paths.Article 1, it is: injecting water by upper inner central tube 7, lower inner central tube 15 again by a point water seating nipple 8, the waterflood path after promoting baffle ring 6 to open via decompression piston 12 injects top water filling layer；Article 2 is: injects the water waterflood path by the annular space of inner and outer pipe, via point water seating nipple 8 and enters packer inner chamber, subordinate's injection well downhole flow regulator injects lower floor.Article two, waterflood path is separated by point water seating nipple and packer.
Two-tube constant current divides water controller can realize water injection pressure when changing in certain pressure differential range, keeps water injection rate constant.When water injection pressure P1 ↑ time, moment pressure reduction P1-P2 ↑, decompression piston 12 compression spring left-hand moves, and the area of pressure-reduction outlet reduces, P2 ↑, P1-P2 keeps constant, it is ensured that injection well downhole flow regulator import and export constant flow；When P1 ↓, Principles of Regulation are identical, regulate in opposite direction.When P3 changes, its principle is similar with P1 change.When carrying out anti-flushing well, well-flushing pressure acts on gear cap 3 end face, and spring is descending, closes waterflood path, it is ensured that being normally carried out of well-flushing work.
During water filling, inject water aperture on adapter sleeve 5 and enter, promote baffle ring 6 up, compression spring, for opening waterflood path, there is the effect that helps out, ensure the smooth opening of waterflood path, prevent water outlet counter-flow resisting valve thorn bad.
When stopping water filling, baffle ring 6 closes well-flushing passage under the effect of spring 4, and in preventing well, booty enters tubing string, has and prevents returning the function told.
Claims (3)
- The most two-tube constant current divides water controller, it is characterised in that it includes inner central tube and is enclosed within the connection outside inner central tube Set, point water seating nipple, divide water seating nipple and be vertically connected with between adapter sleeve together and inner central tube formation annular space, described point Water seating nipple is internally provided with decompressor, described inner central tube offers for connecting decompressor and inner central tube inner chamber Through hole；Described decompressor includes the relief pressure valve cartridge in valve pocket and decompression valve pocket that reduces pressure, by decompression bullet below relief pressure valve cartridge Spring connects decompression piston, offers water nozzle below described decompressor；Described adapter sleeve upper end is provided with gear cap, upper gear cap upper end Connecting outer tube top connection, described adapter sleeve lower end connects baffle ring, and baffle ring lower end is connected with a point water seating nipple, described upper gear cap and gear It is cased with spring outside adapter sleeve between ring.
- Two-tube constant current the most according to claim 1 divides water controller, it is characterised in that described inner central tube is divided into up and down The upper inner central tube connected and lower inner central tube, upper inner central tube upper end connects inner tube top connection, and lower inner central tube lower end connects Inner tube flushing valve.
- Two-tube constant current the most according to claim 1 divides water controller, it is characterised in that described point of water seating nipple lower end is even Connecing lower contact, described lower contact epimere inwall is sealed with inner central tube outer wall to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310184432.8A CN104165043B (en) | 2013-05-17 | 2013-05-17 | Two-tube constant current divides water controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310184432.8A CN104165043B (en) | 2013-05-17 | 2013-05-17 | Two-tube constant current divides water controller |
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| Publication Number | Publication Date |
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| CN104165043A CN104165043A (en) | 2014-11-26 |
| CN104165043B true CN104165043B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310184432.8A Expired - Fee Related CN104165043B (en) | 2013-05-17 | 2013-05-17 | Two-tube constant current divides water controller |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481474B (en) * | 2014-12-31 | 2016-11-30 | 牡丹江博实石油机械科技有限公司 | Anti-sticking antiscale concentric roater regulator |
| CN106121602A (en) * | 2016-06-30 | 2016-11-16 | 中国石油天然气股份有限公司 | Double-channel water distributor for concentric double-layer oil pipe separate injection |
| CN106703767B (en) * | 2017-03-08 | 2019-11-08 | 中国石油天然气股份有限公司 | water distributor |
| CN112211604B (en) * | 2020-10-09 | 2023-01-17 | 山东理工大学 | Be used for big pressure differential self-adaptation injection mandrel in oil well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2211314C1 (en) * | 2002-01-03 | 2003-08-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method of fluid injection into formation |
| CN201306161Y (en) * | 2008-12-09 | 2009-09-09 | 薛相君 | A full-automatic flow regulation water distributor |
| CN101705812A (en) * | 2009-11-17 | 2010-05-12 | 中国海洋石油总公司 | Large-discharge single pipe layered polymer injection and injection allocation method and device |
| CN202882869U (en) * | 2012-10-27 | 2013-04-17 | 中国石油化工股份有限公司 | Hollow water flow regulator free from throwing in and pulling |
| CN203248137U (en) * | 2013-05-17 | 2013-10-23 | 中国石油化工股份有限公司 | Double-pipe constant-flow water distribution control device |
-
2013
- 2013-05-17 CN CN201310184432.8A patent/CN104165043B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2211314C1 (en) * | 2002-01-03 | 2003-08-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method of fluid injection into formation |
| CN201306161Y (en) * | 2008-12-09 | 2009-09-09 | 薛相君 | A full-automatic flow regulation water distributor |
| CN101705812A (en) * | 2009-11-17 | 2010-05-12 | 中国海洋石油总公司 | Large-discharge single pipe layered polymer injection and injection allocation method and device |
| CN202882869U (en) * | 2012-10-27 | 2013-04-17 | 中国石油化工股份有限公司 | Hollow water flow regulator free from throwing in and pulling |
| CN203248137U (en) * | 2013-05-17 | 2013-10-23 | 中国石油化工股份有限公司 | Double-pipe constant-flow water distribution control device |
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| CN104165043A (en) | 2014-11-26 |
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