CN105201454A - Blowout-preventive multifunctional tail pipe for water injection well - Google Patents
Blowout-preventive multifunctional tail pipe for water injection well Download PDFInfo
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- CN105201454A CN105201454A CN201510549979.2A CN201510549979A CN105201454A CN 105201454 A CN105201454 A CN 105201454A CN 201510549979 A CN201510549979 A CN 201510549979A CN 105201454 A CN105201454 A CN 105201454A
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- injection well
- top connection
- telescopic
- water injection
- shutoff
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Abstract
The invention relates to a blowout-preventive multifunctional tail pipe for a water injection well and mainly solves the problems that the sealing performance of a prearranged work cylinder for an existing water injection well working under pressure is unreliable, a liquid overflown from the water injection well during working is prone to be discharged and environmental pollution is caused. The blowout-preventive multifunctional tail pipe is characterized in that a sealing ball seat (3) is connected in an upper connector (1), the bottom of the upper connector (1) is connected with an outer sleeve (5), and a piston (4) is arranged among the upper connector (1), the outer sleeve (5) and the sealing ball seat (3); a telescopic sleeve (10) is arranged in the outer sleeve (5), the outside of the telescopic sleeve (10) is connected with a sliding sleeve (12), the lower part of the telescopic sleeve (10) is connected with an two-way valve upper connector (14), and a spring (13) is arranged between the sliding sleeve (12) and the two-way valve upper connector (14). The blowout-preventive multifunctional tail pipe for the water injection well can be applied to pressurized work and conventional work, the bottom of the water injection well can be sealed, the situation that the liquid is overflown from the inside of an oil pipe during tripping of a string can be reduced, and construction is environment-friendly.
Description
Technical field
The present invention relates to oilfield, is the multi-functional tail pipe of a kind of water injection well jet proof type specifically.
Background technology
Separated-zone water infection oil field well casing column bottom adopts mostly blocks, and routine is blocked and only can be realized sealing under normal production status and anti-flushing well open function, and it is comparatively large and cannot intercept that Injection Well plays overflow in lower tubular column process in operation, pollutes ground environment.A kind of preset seating nipple of water injection well Operating Pressure is had at present on oil field, with entering two-way valve top under tubing string during operation, again deliver blanking plug seal operation bucket at well head during operation, reach the object of not overflow when tripping out tubing string, but there is following problem in this seating nipple: one be the liquid of below afterbody bias is static, and the blanking plug of delivery can not arrive preset seating nipple precalculated position plugging tubing string smoothly; Two is if there is the card phenomenon that is hampered in water injection well, or cover damages serious, and the blanking plug of delivery can not arrive preset seating nipple position plugging tubing string smoothly.Therefore such instrument sealing characteristics is unreliable, can not solve the problem that easy contaminated environment is arranged in water injection well operation overflow outward completely.
Summary of the invention
In order to the preset seating nipple sealing characteristics overcoming existing water injection well Operating Pressure is unreliable, water injection well operation overflow is easily arranged and the deficiency of contaminated environment outward, the invention provides the multi-functional tail pipe of a kind of water injection well jet proof type, the multi-functional tail pipe of this water injection well jet proof type can be applied in Operating Pressure and routine work, realize shutoff bottom Injection Well, Injection Well operation can be reduced and play oil pipe internal overflow in lower tubular column process, realize environmental protection construction.
Technical scheme of the present invention is: the multi-functional tail pipe of a kind of water injection well jet proof type, and comprise top connection, described top connection is internally connected with shutoff ball seat, and shutoff ball seat inside is provided with the conical surface, and the conical surface and ball sealer A match, and are connected with shutoff turnover panel bottom shutoff ball seat; Overcoat is connected with bottom described top connection, top connection, between overcoat and shutoff ball seat, be provided with piston, boss is provided with outside piston base, jacket internal is equipped with telescopic, telescopic internal whorl is connected with support bar, the telescopic inwall on support bar top is fixed with supporting seat, and supporting seat is positioned at bottom shutoff turnover panel; Have liquid pass hole in the middle part of described telescopic, and the outside at liquid pass hole place is connected with sliding sleeve by pin, telescopic bottom connects two-way valve top connection, is provided with spring between sliding sleeve and two-way valve top connection; Described two-way valve top connection bottom inside is matched with ball sealer B by the conical surface, and two-way valve top connection bottom is connected with lower contact, is connected with turnover panel inside lower contact.
The present invention has following beneficial effect: the multi-functional tail pipe of this water injection well jet proof type reserves plugging technology owing to adopting down-hole, can realize shutoff function in the process of going into the well and normal tubing string injects and well-flushing function; Tag during operation, i.e. releasably sealable ball A, realize shutoff bottom tubing string, blocking tube column bottom high pressure liquid stream enters in tubing string, is reclaimed by wellhead casing pipe gate by sleeve pipe.So the multi-functional tail pipe of this water injection well jet proof type has, operation trips out tubing string shutoff function, tubing string shutoff function is transferred in operation and the normal anti-flushing well function injecting production, prevents the liquid stream in operation process in tubing string from arranging outward, realizes environmental protection job execution.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
1-top connection in figure, 2-jump ring, 3-ball sealer base device, 4-piston, 5-overcoat, 6-shutoff turnover panel, 7-ball sealer A, 8-supporting seat, 9-support bar, 10-telescopic, 11-pin, 12-sliding sleeve 13-spring, the top connection of 14-two-way valve, 15-ball sealer B, 16-panel turnover mechanism, 17-lower contact.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the multi-functional tail pipe of a kind of water injection well jet proof type, comprise top connection 1, described top connection 1 is internally connected with shutoff ball seat 3, the inner side of shutoff ball seat 3 bottom is provided with taper seat, taper seat lower openings place is provided with ball sealer, and taper seat and ball sealer A7 match, and are connected with shutoff turnover panel 6 bottom shutoff ball seat 3, ball sealer A7 can move up and down under the effect of external force, promote shutoff turnover panel 6 to overturn, make ball sealer A7 fall in shutoff ball seat 3, form one way valve.This one way valve has shutoff and earial drainage effect in pipe.In lift pipe string process, if below tubing string during hydraulic pressure height, ball sealer A7 is adjacent to the upper conical surface of shutoff ball seat 3, plays shutoff blowout prevention effect; When hydraulic pressure is low, ball sealer A7 falls on shutoff turnover panel 6, plays earial drainage effect.Overcoat 5 is connected with bottom described top connection 1, top connection 1, between overcoat 5 and shutoff ball seat 3, be provided with piston 4, piston 4 inner surface and shutoff ball seat 3 exterior surface, piston 4 top is connected by jump ring 2 with between top connection 1, be provided with boss in the middle part of piston 4 external surface, fixed by pin between boss external surface and overcoat.
Overcoat 5 inside is equipped with telescopic 10, telescopic 10 top is holding card mechanism, namely telescopic 10 outer surface of cupular part periphery has projection, and the bottom surface of projection is for facing directly, be inclined-plane above, overcoat 5 inwall has the groove matched with above-mentioned projection, make telescopic 10 slide so far position time, projection may be stuck in groove.Telescopic 10 internal whorl is connected with support bar 9, telescopic 10 inwall on support bar 9 top is fixed with supporting seat 8, and supporting seat 8 is positioned at bottom shutoff turnover panel 6; Above-mentioned support bar 9 supporting seat 8 all has through hole in the axial direction.In the middle part of described telescopic 10, sidewall has liquid pass hole, and the outside at liquid pass hole place is connected with sliding sleeve 12 by pin 11, telescopic 10 bottom connects two-way valve top connection 14, is provided with spring 13 between sliding sleeve 12 and two-way valve top connection 14.Described two-way valve top connection 14 bottom inside is provided with the conical surface, and the conical surface matches with ball sealer B15, and two-way valve top connection 14 bottom is connected with lower contact 17, is connected with turnover panel 16 inside lower contact 17.
This seating nipple is installed on bottom Injection Well tubing string, in tubing string goes into the well process, ball sealer B15 is close to two-way valve top connection 14 under the effect of turnover panel 16, ball sealer B15 is by channel enclosed, prevent the inner feed liquor of tubing string in tubing string decentralization process, less than one well protection tubing string plays in the holding card mechanism of telescopic 10 upper end, in the process of going into the well, the projection of telescopic 10 is stuck in the groove of overcoat 5 inwall, left side and upside are limited position by piston 4, therefore, telescopic 10 axis, radial direction in the process of going into the well all can not move; After entering under tubing string, ground is to the inner injection liquid stream of tubing string, stirs turnover panel 16, drop in the valve seat of lower contact 17 at action of hydraulic force lower seal ball B15, closes under realizing injection state; Now injection liquid stream is continued to tubing string inside in ground, while packer setting, piston 4 moves, and by jump ring 2 monodirectional locking in top connection 1, to slide headspace to telescopic 10.During anti-flushing well, ball sealer B15 is promoted by upwards liquid stream, but is intercepted by turnover panel 16 and realize anti-flushing well function; Shutoff turnover panel 6, supporting seat 8, support bar 9 all there is liquid pass hole, does not affect water injection well and normally produce and anti-flushing well.
Again during operation, first overall tubing string is tagged, after tubing string contacts shaft bottom, overcoat 5 touches sliding sleeve 12 and cuts off pin 11, Compress Spring 13 together, two-way valve top connection 14, telescopic 10 drive support bar 9, supporting seat 8, ball sealer A7 relative tubing string move upward, and back down shutoff turnover panel 6, are headed into by ball sealer A7 in shutoff ball seat 3 device.After having visited artificial bottom of a well, tubing string is carried, spring 13 recovers normal condition, and promotion two-way valve top connection 14, telescopic 10, support bar 9, supporting seat 8 move downward, and spring 13 upwards backs down sliding sleeve 12 simultaneously, is exposed in the hole on telescopic 10, oil jacket is communicated with.
When now tripping out tubing string, telescopic 10 hangs on overcoat 5, can not throw off, ball sealer A7 and shutoff ball seat 3 form one way valve, and when bottom pressure is larger, ball sealer A7 is fitted in shutoff ball seat 3 top, stop the overflow of tubing string inner high voltage, overflow is reclaimed through wellhead casing pipe gate by sleeve pipe; When oily overpressure is greater than tubing string base pressure, ball sealer A7 drops to shutoff ball seat 3 bottom, in tubing string, liquid enters sleeve pipe equally and reclaims via wellhead casing pipe gate, realize shutoff function bottom Injection Well, reduce Injection Well operation and play oil pipe internal overflow in lower tubular column process, ensure environmental protection construction.
Claims (2)
1. the multi-functional tail pipe of water injection well jet proof type, comprise top connection (1), it is characterized in that: described top connection (1) is internally connected with shutoff ball seat (3), shutoff ball seat (3) inside is provided with the conical surface, and the conical surface and ball sealer A(7) match, shutoff ball seat (3) bottom is connected with shutoff turnover panel (6); Described top connection (1) bottom is connected with overcoat (5), top connection (1), between overcoat (5) and shutoff ball seat (3), be provided with piston (4), piston (4) bottom outside is provided with boss, overcoat (5) inside is equipped with telescopic (10), telescopic (10) internal whorl is connected with support bar (9), telescopic (10) inwall on support bar (9) top is fixed with supporting seat (8), and supporting seat (8) is positioned at shutoff turnover panel (6) bottom; Described telescopic (10) middle part has liquid pass hole, and the outside at liquid pass hole place is connected with sliding sleeve (12) by pin (11), telescopic (10) bottom connects two-way valve top connection (14), is provided with spring (13) between sliding sleeve (12) and two-way valve top connection (14); Described two-way valve top connection (14) bottom inside is by the conical surface and ball sealer B(15) to match, two-way valve top connection (14) bottom is connected with lower contact (17), and lower contact (17) inner side is connected with turnover panel (16).
2. the multi-functional tail pipe of water injection well jet proof type according to claim 1, it is characterized in that: described telescopic (10) outer surface of cupular part periphery has projection, and the bottom surface of projection is for facing directly, is inclined-plane above, described overcoat (5) inwall has the groove matched with above-mentioned projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510549979.2A CN105201454B (en) | 2015-09-01 | 2015-09-01 | The multi-functional tail pipe of water injection well jet proof type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510549979.2A CN105201454B (en) | 2015-09-01 | 2015-09-01 | The multi-functional tail pipe of water injection well jet proof type |
Publications (2)
| Publication Number | Publication Date |
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| CN105201454A true CN105201454A (en) | 2015-12-30 |
| CN105201454B CN105201454B (en) | 2017-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510549979.2A Expired - Fee Related CN105201454B (en) | 2015-09-01 | 2015-09-01 | The multi-functional tail pipe of water injection well jet proof type |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604520A (en) * | 2016-01-31 | 2016-05-25 | 梁伟成 | Packer with function of pressure relief protection |
| CN105781508A (en) * | 2016-05-01 | 2016-07-20 | 中国石油化工股份有限公司 | Constant-pressure throttling device for small-diameter water injection well |
| CN106522900A (en) * | 2016-12-09 | 2017-03-22 | 中国石油天然气股份有限公司 | Bidirectional blowout-prevention ball seat for control over fluid in water well shaft |
| CN107461174A (en) * | 2017-09-26 | 2017-12-12 | 西南石油大学 | A kind of storm valve |
| CN107842336A (en) * | 2017-11-28 | 2018-03-27 | 大庆元山油田技术服务有限公司 | A kind of pull-type oil pipe passage preventer |
| CN111075373A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Continuous sand washing well-flushing tool and method |
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| CN201024988Y (en) * | 2007-02-09 | 2008-02-20 | 中国石油化工股份有限公司中原油田分公司采油工程技术研究院 | An overflow leakage flowing ball base |
| CN201024982Y (en) * | 2007-04-28 | 2008-02-20 | 中国石油天然气股份有限公司 | A concrete extrusion and injection control tool |
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| RU2467158C1 (en) * | 2011-05-04 | 2012-11-20 | Открытое Акционерное Общество "Тяжпрессмаш" | Check valve for casing string |
| CN204457571U (en) * | 2015-01-08 | 2015-07-08 | 中国石油天然气股份有限公司 | Impact pump type well blowout preventing device |
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2015
- 2015-09-01 CN CN201510549979.2A patent/CN105201454B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5472054A (en) * | 1995-02-09 | 1995-12-05 | Hinds; Arron C. | Free pumping apparatus safety valve system and method |
| CN2554344Y (en) * | 2002-06-12 | 2003-06-04 | 辽河石油勘探局兴隆台工程技术处 | Reversable pressure stop ball seat |
| CN201024988Y (en) * | 2007-02-09 | 2008-02-20 | 中国石油化工股份有限公司中原油田分公司采油工程技术研究院 | An overflow leakage flowing ball base |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604520A (en) * | 2016-01-31 | 2016-05-25 | 梁伟成 | Packer with function of pressure relief protection |
| CN105781508A (en) * | 2016-05-01 | 2016-07-20 | 中国石油化工股份有限公司 | Constant-pressure throttling device for small-diameter water injection well |
| CN106522900A (en) * | 2016-12-09 | 2017-03-22 | 中国石油天然气股份有限公司 | Bidirectional blowout-prevention ball seat for control over fluid in water well shaft |
| CN106522900B (en) * | 2016-12-09 | 2019-01-22 | 中国石油天然气股份有限公司 | A kind of two-way blowout-preventing ball seat for the control of well wellbore fluids |
| CN107461174A (en) * | 2017-09-26 | 2017-12-12 | 西南石油大学 | A kind of storm valve |
| CN107461174B (en) * | 2017-09-26 | 2023-07-21 | 西南石油大学 | Underground safety valve |
| CN107842336A (en) * | 2017-11-28 | 2018-03-27 | 大庆元山油田技术服务有限公司 | A kind of pull-type oil pipe passage preventer |
| CN107842336B (en) * | 2017-11-28 | 2023-12-22 | 大庆元山油田技术服务有限公司 | Lifting type oil pipe channel blowout preventer |
| CN111075373A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Continuous sand washing well-flushing tool and method |
| CN111075373B (en) * | 2018-10-22 | 2023-08-04 | 中国石油化工股份有限公司 | Continuous sand flushing well-flushing tool and method |
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| CN105201454B (en) | 2017-12-08 |
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