CN103806883A - Pre-throttling anti-stabbing water distributor - Google Patents
Pre-throttling anti-stabbing water distributor Download PDFInfo
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- CN103806883A CN103806883A CN201210436712.9A CN201210436712A CN103806883A CN 103806883 A CN103806883 A CN 103806883A CN 201210436712 A CN201210436712 A CN 201210436712A CN 103806883 A CN103806883 A CN 103806883A
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- piston
- center tube
- guide sleeve
- flow guide
- injection well
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Abstract
The invention discloses a pre-throttling anti-stabbing water distributor which mainly comprises an upper joint, a lower joint, an upper central pipe, a lower central pipe, a piston assembly and a throttle pipe. The upper end of the upper central pipe is connected to the upper joint, the lower end of the lower central pipe is connected to the lower joint, the middle of the upper central pipe and the middle of the lower central pipe are both connected to an upper flow guide sleeve, a lower flow guide sleeve is arranged at the bottom of the lower central pipe, the upper flow guide sleeve is connected with the lower flow guide sleeve through the throttle pipe, and the upper central pipe located above the upper flow guide sleeve is sleeved with the piston assembly. The piston assembly comprises a control piston and a seal piston, an annular piston cavity is formed between the control piston and the upper central pipe, the piston cavity is communicated with the upper flow guide sleeve below the piston cavity, the seal piston is arranged in the piston cavity in a sleeved mode, the lower portion of the control piston is connected with the seal piston through threads, the lower end of the seal piston is connected with a seal regulating ring and a seal ring is arranged between the seal piston and the seal regulating ring. The pre-throttling anti-stabbing water distributor is beneficial to reducing throwing and salvage deploying workloads, prolonging in-well validity periods of pipe columns and reducing the invalid water injection rate.
Description
Technical field
The present invention relates to water injection well layering water dispensing apparatus, specifically the pre-anti-stab injection well downhole flow regulator of throttling.
Background technology
The injection well downhole flow regulator of on-the-spot application mainly contains hollow distributor and eccentric injection mandrel at present, is mainly used in 2 layers of above layering water distribution of water injection well.Along with deepening continuously of fine development, the interlayer large pressure reduction dispensing well increasing year by year differing greatly that absorbs water, oil field at present adopts conventional injection well downhole flow regulator to allocate, exist " allocate not open or high permeability formation step-down throttling control difficulty large ", " water injection well choke thorn is large ", " injection well downhole flow regulator thorn is bad " problem that phenomenon is comparatively serious, not only increase allotment operation number of times, cost of production is increased; Reduce the counter-flow resisting performance of injection well downhole flow regulator, shorten tubing string in well period of validity; And can cause current heterogeneous reservoir seperated layer water injection interval qualification rate lower, can not be stratum makeup energy timely and effectively.
In view of this,, for the problems referred to above, propose a kind of reasonable in design and effectively improve the anti-stab injection well downhole flow regulator of pre-throttling of above-mentioned disappearance.
Summary of the invention
The object of the present invention is to provide the anti-stab injection well downhole flow regulator of pre-throttling, contribute to reduce pulling allotment workload, extend tubing string in well period of validity, reduce invalid water injection rate.
In order to reach above-mentioned purpose, the present invention has adopted following technical scheme, the pre-anti-stab injection well downhole flow regulator of throttling, mainly comprise top connection, lower contact, upper center tube, lower center tube, piston assembly, throttle pipe, described upper center tube upper end is connected in top connection, described lower center tube lower end is connected in lower contact, described upper lower center tube is all connected on flow guide sleeve in centre, be provided with lower flow guide sleeve in lower center tube bottom, between described upper and lower flow guide sleeve, connect with throttle pipe, on the upper center tube of described upper flow guide sleeve top, cover has piston assembly.
Described piston assembly comprises control piston, packed-piston, between described control piston and upper center tube, form annular space plunger shaft, the upper flow guide sleeve of plunger shaft and below is connected state, there is packed-piston in plunger shaft inner sleeve, control piston bottom is connected with packed-piston by screw thread, described packed-piston lower end connects sealing adjustable ring, and sealing ring is set between the two.
In described plunger shaft, packed-piston top is also provided with the joint ring being fastened on upper center tube, control piston upper surface is withstood in location, described joint ring upper surface, all sides fit tightly on control piston circumferential inner wall, between described joint ring and control piston, sealing ring are set.
Described piston assembly top is provided with the spring being enclosed within on upper center tube, and described top connection outside cover has upper adjustable ring, and described spring upper end withstands on upper adjustable ring by baffle ring.
Described throttle pipe two ends are connected on upper and lower flow guide sleeve by throttle pipe connector respectively.
Described lower flow guide sleeve upper end is threaded connection on lower center tube outer wall, lower end is threaded connection on lower contact outer wall, between described lower flow guide sleeve, lower center tube, lower contact three, form annular space, on lower center tube, offer the through hole that is communicated to this annular space, this annular space upper end is communicated to throttle pipe.
Described upper center tube upper end and top connection junction are provided with sealing ring, and upper center tube lower end and upper flow guide sleeve junction are also provided with sealing ring.
Described throttle pipe is multi-turn pressure pipe, is enclosed within lower center tube periphery,
Described multi-turn pressure pipe is the withstand voltage metal tube of multi-turn.
Compared to prior art, the present invention has following beneficial effect:
1, meet the high permeability formation throttling control water distribution of interlayer difference between reservoir pre ssure and injection pressure > 5MPa well;
2, effectively prevent that injection well downhole flow regulator water outlet position and the large thorn of water nozzle thorn are bad;
3, while preventing from stopping noting in well dirt cause injection well downhole flow regulator to stop up through counter tell to oil pipe of injection well downhole flow regulator or oil pipe in the problem of dirt deposition.
Accompanying drawing explanation
Fig. 1 is the structural representation of the anti-stab injection well downhole flow regulator of the pre-throttling of the present invention.
In figure: 1-top connection; 2,7,10,12,14-sealing ring; Adjustable ring on 3; Adjustable ring under 22-; 4-baffle ring; 5-upper center tube; 6-spring; 8-control piston; 9-joint ring; 11-packed-piston; 13-seals adjustable ring; Flow guide sleeve on 15; Flow guide sleeve under 20-; 16,19-throttle pipe connector; 17-throttle pipe; 18-lower center tube; 21-lower contact.
The specific embodiment
Relevant detailed description of the present invention and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides the use of reference with explanation, is not used for the present invention to be limited.
Shown in Fig. 1, top connection 1 is inner to be threaded connection with upper center tube 5, and both seal by sealing ring 2.Top connection is outside to be threaded connection with upper adjustable ring 3.Baffle ring 4 is arranged on upper center tube 5 outsides, and the top adjustable ring 3 in top is located, and spring 6 is sleeved on outside central tube, is arranged between baffle ring 4 and control piston 8.Joint ring 9 is threaded connection with the middle part of upper center tube 5, packed-piston 11 top screw threads and control piston 8 are threaded connection, packed-piston 11 lower thread are connected with sealing adjustable ring 13, and sealing ring 12 is equipped with in centre, realizes the sealing between piston and upper flow guide sleeve 15.Control piston and packed-piston can together with along the axial upstream or downstream of injection well downhole flow regulator.Control piston 8 is by joint ring 9 location, upper end.Upper center tube 5 is threaded connection with upper flow guide sleeve 15 respectively with lower center tube 18, and throttle pipe connector 16,19 is connected with upper flow guide sleeve 15, lower flow guide sleeve 20 respectively by screw thread.Throttle pipe 17 is wrapped in lower center tube outside, and upper and lower two ends are contained in respectively throttle pipe connector 16,19 inside, is fixed and is sealed respectively by the soft metal distortion of connector 16,19 ends.Lower contact 21 is inner to be threaded connection with lower center tube 18, and outside and lower adjustable ring 22 is threaded connection, and realizes the sealing to injected water with lower flow guide sleeve 20 by sealing ring.
While going into the well, injection well downhole flow regulator is connected to near the tubing string position oil reservoir that needs water distribution, injection well downhole flow regulator is in original state as shown in the figure; While setting, suppress from oil pipe, while cooperation with amplificate packer, directly suppress and can make packer setting, also can coordinate compression packer to set by the dead fuse of pulling.
When water filling, injected water is by the weep hole pressure transmission of upper center tube 5, under less injection pressure, the control piston poor promotion control piston 8 of 8 external and internal pressure Compress Spring together with packed-piston 11 is up, open in advance by the waterflood path between control piston 8 and upper flow guide sleeve 15, avoid high-pressure injected water to attack sealing ring 12 and control piston 8 lower ends directly, prevented that delivery port thorn is bad.Injected water carries out reducing pressure by regulating flow by weep hole, lower flow guide sleeve 20 and the throttle pipe 17 of lower center tube 18 successively simultaneously, injects stratum, thereby realize the throttling control water filling under the large pressure reduction of interlayer with lower pressure in the waterflood path of opening in advance.
While stopping noting, control piston 8 is descending under the restoring force effect of spring 6 together with packed-piston 11, thereby closes by the waterflood path between control piston 8 and upper flow guide sleeve 15, can effectively prevent in pit shaft that counter the telling of dirt cause water nozzle clogging in injection well downhole flow regulator.
The foregoing is only preferred embodiment of the present invention, non-in order to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (9)
1. the pre-anti-stab injection well downhole flow regulator of throttling, it is characterized in that, mainly comprise top connection, lower contact, upper center tube, lower center tube, piston assembly, throttle pipe, described upper center tube upper end is connected in top connection, described lower center tube lower end is connected in lower contact, and described upper lower center tube is all connected on flow guide sleeve in centre, is provided with lower flow guide sleeve in lower center tube bottom, between described upper and lower flow guide sleeve, connect with throttle pipe, on the upper center tube of described upper flow guide sleeve top, cover has piston assembly.
2. the anti-stab injection well downhole flow regulator of pre-throttling according to claim 1, it is characterized in that, described piston assembly comprises control piston, packed-piston, between described control piston and upper center tube, form annular space plunger shaft, the upper flow guide sleeve of plunger shaft and below is connected state, has packed-piston in plunger shaft inner sleeve, and control piston bottom is connected with packed-piston by screw thread, described packed-piston lower end connects sealing adjustable ring, and sealing ring is set between the two.
3. the anti-stab injection well downhole flow regulator of pre-throttling according to claim 2, it is characterized in that, in described plunger shaft, packed-piston top is also provided with the joint ring being fastened on upper center tube, control piston upper surface is withstood in location, described joint ring upper surface, all sides fit tightly on control piston circumferential inner wall, between described joint ring and control piston, sealing ring are set.
4. the anti-stab injection well downhole flow regulator of pre-throttling according to claim 1, is characterized in that, described piston assembly top is provided with the spring being enclosed within on upper center tube, and described top connection outside cover has upper adjustable ring, and described spring upper end withstands on upper adjustable ring by baffle ring.
5. the anti-stab injection well downhole flow regulator of pre-throttling according to claim 1, is characterized in that, described throttle pipe two ends are connected on upper and lower flow guide sleeve by throttle pipe connector respectively.
6. the anti-stab injection well downhole flow regulator of pre-throttling according to claim 1, it is characterized in that, described lower flow guide sleeve upper end is threaded connection on lower center tube outer wall, lower end is threaded connection on lower contact outer wall, between described lower flow guide sleeve, lower center tube, lower contact three, form annular space, on lower center tube, offer the through hole that is communicated to this annular space, this annular space upper end is communicated to throttle pipe.
7. the anti-stab injection well downhole flow regulator of pre-throttling according to claim 1, is characterized in that, described upper center tube upper end and top connection junction are provided with sealing ring, and upper center tube lower end and upper flow guide sleeve junction are also provided with sealing ring.
8. the anti-stab injection well downhole flow regulator of pre-throttling according to claim 1, is characterized in that, described throttle pipe is multi-turn pressure pipe, is enclosed within lower center tube periphery.
9. the anti-stab injection well downhole flow regulator of pre-throttling according to claim 8, is characterized in that, described multi-turn pressure pipe is the withstand voltage metal tube of multi-turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436712.9A CN103806883B (en) | 2012-11-06 | 2012-11-06 | The anti-stab injection well downhole flow regulator of pre-throttling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436712.9A CN103806883B (en) | 2012-11-06 | 2012-11-06 | The anti-stab injection well downhole flow regulator of pre-throttling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103806883A true CN103806883A (en) | 2014-05-21 |
| CN103806883B CN103806883B (en) | 2016-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210436712.9A Expired - Fee Related CN103806883B (en) | 2012-11-06 | 2012-11-06 | The anti-stab injection well downhole flow regulator of pre-throttling |
Country Status (1)
| Country | Link |
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| CN (1) | CN103806883B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121602A (en) * | 2016-06-30 | 2016-11-16 | 中国石油天然气股份有限公司 | A kind of dual pathways injection well downhole flow regulator for concentric double layer oil pipe dispensing |
| CN108019193A (en) * | 2016-11-02 | 2018-05-11 | 中国石油化工股份有限公司 | Hollow survey adjusts one to note poly- device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1050427A (en) * | 1989-09-22 | 1991-04-03 | 中原石油勘探局采油工艺研究所 | Double-layer self-adjustable water distributor |
| CN2656634Y (en) * | 2003-08-04 | 2004-11-17 | 东营银星石油技术开发有限责任公司 | New type hollow water distribution apparatus |
| RU2274737C1 (en) * | 2004-08-30 | 2006-04-20 | Анатолий Прокопьевич Чебунин | System for water injection in injection well for formation pressure maintenance |
| CN201090196Y (en) * | 2007-09-25 | 2008-07-23 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Underground hollow constant flux water distributor |
| CN201826822U (en) * | 2010-07-02 | 2011-05-11 | 孔宪春 | Intensive water distributor |
| CN202937238U (en) * | 2012-11-06 | 2013-05-15 | 中国石油化工股份有限公司 | Beforehand throttle stab-resistant water distributor |
-
2012
- 2012-11-06 CN CN201210436712.9A patent/CN103806883B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1050427A (en) * | 1989-09-22 | 1991-04-03 | 中原石油勘探局采油工艺研究所 | Double-layer self-adjustable water distributor |
| CN2656634Y (en) * | 2003-08-04 | 2004-11-17 | 东营银星石油技术开发有限责任公司 | New type hollow water distribution apparatus |
| RU2274737C1 (en) * | 2004-08-30 | 2006-04-20 | Анатолий Прокопьевич Чебунин | System for water injection in injection well for formation pressure maintenance |
| CN201090196Y (en) * | 2007-09-25 | 2008-07-23 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Underground hollow constant flux water distributor |
| CN201826822U (en) * | 2010-07-02 | 2011-05-11 | 孔宪春 | Intensive water distributor |
| CN202937238U (en) * | 2012-11-06 | 2013-05-15 | 中国石油化工股份有限公司 | Beforehand throttle stab-resistant water distributor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121602A (en) * | 2016-06-30 | 2016-11-16 | 中国石油天然气股份有限公司 | A kind of dual pathways injection well downhole flow regulator for concentric double layer oil pipe dispensing |
| CN108019193A (en) * | 2016-11-02 | 2018-05-11 | 中国石油化工股份有限公司 | Hollow survey adjusts one to note poly- device |
| CN108019193B (en) * | 2016-11-02 | 2023-09-05 | 中国石油化工股份有限公司 | Hollow measuring and adjusting integrated polymer injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103806883B (en) | 2016-04-27 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20160427 Termination date: 20191106 |