CN102828732B - Two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string and dispensing method thereof - Google Patents
Two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string and dispensing method thereof Download PDFInfo
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- CN102828732B CN102828732B CN201110161008.2A CN201110161008A CN102828732B CN 102828732 B CN102828732 B CN 102828732B CN 201110161008 A CN201110161008 A CN 201110161008A CN 102828732 B CN102828732 B CN 102828732B
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Abstract
A kind of petroleum industry water filling two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string and dispensing method thereof, comprise and insert sealer (2), sleeve pipe precast sealed tube (3), first order water filling interval (14) etc., sleeve pipe precast sealed tube (3) is placed in top, circle, first order water filling interval (14) top, sleeve pipe precast sealed tube (6) is placed between first order water filling interval (14) and second level water filling interval (15), sleeve pipe precast sealed tube (6) is placed between injection well downhole flow regulator (4) and injection well downhole flow regulator (7) simultaneously, inserting sealer (2) is placed in the middle of sleeve pipe precast sealed tube (3), insert sealer (5) and be placed in sleeve pipe precast sealed tube (6), channelling phenomenon can be effectively avoided to occur, separate desanding card success rate high, it is high that pulling is measured success rate, tubing string and HTHP that interlayer difference large dark inclined shaft strong adaptability high for water injection pressure, period of validity is long.
Description
Technical field
The invention provides a kind of petroleum industry water filling two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string instrument and layered water injection method thereof.
Background technology
At present, each oil field, in multilayered reservoir waterflooding extraction process, generally uses separate injection tubing string.Separate injection tubing string mainly comprises packer, injection well downhole flow regulator, bidirectional anchor, two ball seat, screen casing, plug etc., during normal water filling, injects water and enters stratum from oil pipe through injection well downhole flow regulator, generally can meet dispensing demand.Due to separate injection tubing string structure imperfection, also there are following four deficiencies: (1) packer well-washing passage is less, water quality or hole condition poor time, granule foreign is easily trapped in well-flushing passage, cause on the one hand well-flushing passage that blocking and cannot well-flushing occurs, also can cause flushing valve card or be not closed completely on the other hand, causing packer to occur channelling up and down, affect dispensing effect; (2) for the water injection well easily shaked out, separate injection tubing string easily occurs that sand buries, sand card, and overhaul probability is high; (3) in packer central tube, latus rectum is less, and pulling is measured instrument and is easily hampered card, reduces pulling and is measured success rate; (4) the dark inclined shaft packer construction of HTHP is complicated, expensive, and in the operation of inspection pipe dispensing, the instruments such as frequent replacing packer, investment can be caused large, and cost is high.
Summary of the invention
The object of the present invention is to provide a kind of petroleum industry water filling two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string instrument and dispensing method thereof.
Separate injection tubing string of the present invention forms primarily of bidirectional anchor 1, insertion sealer 2, sleeve pipe precast sealed tube 3, injection well downhole flow regulator 4, insertion sealer 5, sleeve pipe precast sealed tube 6, injection well downhole flow regulator 7, oil pipe 8, two ball seat 9, screen casing 10, plug 11, sleeve pipe 12, artificial bottom of a well 13, first order water filling interval 14, second level water filling interval 15, described insertion sealer body 2g is built-in overcurrent runner 2e axially, insertion sealer body 2g upper end arranges water inlet 2n and is communicated with overcurrent runner 2e, and insertion sealer body 2g lower end sets out mouth of a river 2o and is communicated with overcurrent runner 2e; Water inlet piston 2d is inlaid in the circular hole of overcurrent runner 2e upper end, and water inlet piston 2d upper surface is fixedly connected with water inlet spring 2a; Arrange inlet seal pad 2c between upper cover body 2b lower surface and insertion sealer body 2g, upper cover body 2b holds external screw thread to be connected with insertion sealer body 2g box 2m; Delivery port piston 2h is inlaid in the circular hole of overcurrent runner 2e lower end, delivery port piston 2h lower surface is fixedly connected with delivery port spring 2i, set out mouth of a river sealing mat 2j between lower cover 2k upper surface and insertion sealer body 2g, lower cover 2k holds external screw thread to be connected with insertion sealer body 2g pin thread 2L.
Water inlet piston 2d movement position, near inserting upper end, side, sealer axle center boss, is delimited by described overcurrent runner 2e inwall; Delivery port piston 2h movement position, near lower end, side, axle center boss, is delimited by described overcurrent runner 2e inwall.The external multiple-sealed circle 2f of described insertion sealer.
The dispensing method of two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string is utilized to realize as follows:
The first step, described sleeve pipe precast sealed tube 3 is being bored completion phase according to geologic requirements in advance with in production string lower going-into-well with described sleeve pipe precast sealed tube 6, sleeve pipe precast sealed tube 3 is preset at first order water filling interval 14 and pushes up top, boundary, and sleeve pipe precast sealed tube 6 is preset between first order water filling interval 14 and second level water filling interval 15;
Second step, under enter separate injection tubing string, by plug 11, screen casing 10, two ball seat 9, injection well downhole flow regulator 7, insertion sealer 5 and injection well downhole flow regulator 4 successively by sleeve pipe precast sealed tube 3, until insert sealer 5 and sleeve pipe precast sealed tube 6 realization insertion sealing, insertion sealer 2 and sleeve pipe precast sealed tube 3 realize insertion and seal location.Described sleeve pipe precast sealed tube 6 is between injection well downhole flow regulator 4 and injection well downhole flow regulator 7; Bidirectional anchor 1 is placed in the top of inserting sealer 2, and two ball seat 9, screen casing 10 and plug 11 are placed in the bottom of oil pipe 8 successively;
3rd step, insertion sealer 2 is inserted among sleeve pipe precast sealed tube 3, be inserted into by insertion sealer 5 among sleeve pipe precast sealed tube 6, described insertion sealer multiple-sealed circle 2f and described precast sealed tube realize inserting sealing, separate oil sets annular space and realize seperated layer water injection;
4th step, opens oil pipe Water filling valve, closes oil jacket annulus water injection valve, injects water through the often cover injection well downhole flow regulator of oil pipe and tubing string and injects oil pipe and casing annulus, inject water filling interval at different levels;
5th step, open oil jacket annulus water injection valve, close oil pipe Water filling valve, water is injected the oil pipe between insertion sealer 2 and insertion sealer 5 and casing annulus, promote to insert water inlet piston 2d up compression water inlet spring 2a in sealer 5, open water inlet 2n, inject water and enter overcurrent runner 2e, promote delivery port piston 2h descending compression delivery port spring 2i, open delivery port 2o, inject water and enter the oil pipe and casing annulus that insert sealer 5 bottom, eventually pass screen casing 10, two ball seat 9 enters oil pipe 8, part water enters in oil pipe 8 through injection well downhole flow regulator 4 and injection well downhole flow regulator 7 simultaneously, realize separate injection tubing string anti-flushing well.
The invention has the advantages that: (1) well-flushing passage is large, and should not be blocked by granule foreign, flushing valve is easily closed, and avoids flushing valve card or is not closed completely and makes packer occur channelling up and down; (2) for easy sand output well, solution desanding card success rate is high, reduces overhaul probability; (3) insert latus rectum in sealer central tube large, it is high that pulling is measured success rate; (4) tubing string for easy sand output well, corrosion and scaling well, water injection pressure the high and dark inclined shaft strong adaptability of interlayer difference is large HTHP, separate injection tubing string structure is simple, and few easy workout part, reusable, period of validity is long.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 inserts sealer structural representation shown in Fig. 1
Fig. 3 inserts the sectional view of sealer along A-A line shown in Fig. 2
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described: separate injection tubing string of the present invention is primarily of bidirectional anchor 1, insert sealer 2, sleeve pipe precast sealed tube 3, injection well downhole flow regulator 4, insert sealer 5, sleeve pipe precast sealed tube 6, injection well downhole flow regulator 7, oil pipe 8, two ball seat 9, screen casing 10, plug 11, sleeve pipe 12, artificial bottom of a well 13, first order water filling interval 14, second level water filling interval 15 forms, described insertion sealer body 2g is built-in overcurrent runner 2e axially, insertion sealer body 2g upper end arranges water inlet 2n and is communicated with overcurrent runner 2e, insertion sealer body 2g lower end sets out mouth of a river 2o and is communicated with overcurrent runner 2e, water inlet piston 2d is inlaid in the circular hole of overcurrent runner 2e upper end, and water inlet piston 2d upper surface is fixedly connected with water inlet spring 2a, arrange inlet seal pad 2c between upper cover body 2b lower surface and insertion sealer body 2g, upper cover body 2b holds external screw thread to be connected with insertion sealer body 2g box 2m, delivery port piston 2h is inlaid in the circular hole of overcurrent runner 2e lower end, delivery port piston 2h lower surface is fixedly connected with delivery port spring 2i, set out mouth of a river sealing mat 2j between lower cover 2k upper surface and insertion sealer body 2g, lower cover 2k holds external screw thread to be connected with insertion sealer body 2g pin thread 2L.
Water inlet piston 2d movement position, near inserting upper end, side, sealer axle center boss, is delimited by described overcurrent runner 2e inwall; Delivery port piston 2h movement position, near lower end, side, axle center boss, is delimited by described overcurrent runner 2e inwall.The external multiple-sealed circle 2f of described insertion sealer.
The dispensing method of two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string is utilized to realize as follows:
The first step, described sleeve pipe precast sealed tube 3 is being bored completion phase according to geologic requirements in advance with in production string lower going-into-well with described sleeve pipe precast sealed tube 6, sleeve pipe precast sealed tube 3 is preset at first order water filling interval 14 and pushes up top, boundary, and sleeve pipe precast sealed tube 6 is preset between first order water filling interval 14 and second level water filling interval 15;
Second step, under enter separate injection tubing string, by plug 11, screen casing 10, two ball seat 9, injection well downhole flow regulator 7, insertion sealer 5 and injection well downhole flow regulator 4 successively by sleeve pipe precast sealed tube 3, until insert sealer 5 and sleeve pipe precast sealed tube 6 realization insertion sealing, insertion sealer 2 and sleeve pipe precast sealed tube 3 realize insertion and seal location.Described sleeve pipe precast sealed tube 6 is between injection well downhole flow regulator 4 and injection well downhole flow regulator 7; Bidirectional anchor 1 is placed in the top of inserting sealer 2, and two ball seat 9, screen casing 10 and plug 11 are placed in the bottom of oil pipe 8 successively;
3rd step, insertion sealer 2 is inserted among sleeve pipe precast sealed tube 3, be inserted into by insertion sealer 5 among sleeve pipe precast sealed tube 6, described insertion sealer multiple-sealed circle 2f and described precast sealed tube realize inserting sealing, separate oil sets annular space and realize seperated layer water injection;
4th step, opens oil pipe Water filling valve, closes oil jacket annulus water injection valve, injects water through the often cover injection well downhole flow regulator of oil pipe and tubing string and injects oil pipe and casing annulus, inject water filling interval at different levels;
5th step, open oil jacket annulus water injection valve, close oil pipe Water filling valve, water is injected the oil pipe between insertion sealer 2 and insertion sealer 5 and casing annulus, promote to insert water inlet piston 2d up compression water inlet spring 2a in sealer 5, open water inlet 2n, inject water and enter overcurrent runner 2e, promote delivery port piston 2h descending compression delivery port spring 2i, open delivery port 2o, inject water and enter the oil pipe and casing annulus that insert sealer 5 bottom, eventually pass screen casing 10, two ball seat 9 enters oil pipe 8, part water enters in oil pipe 8 through injection well downhole flow regulator 4 and injection well downhole flow regulator 7 simultaneously, realize separate injection tubing string anti-flushing well.
Claims (1)
1. two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string, comprise bidirectional anchor (1), insert sealer (2), sleeve pipe precast sealed tube (3), injection well downhole flow regulator (4), insert sealer (5), sleeve pipe precast sealed tube (6), injection well downhole flow regulator (7), oil pipe (8), two ball seat (9), screen casing (10), plug (11), sleeve pipe (12), artificial bottom of a well (13), first order water filling interval (14), second level water filling interval (15), it is characterized in that: described insertion sealer body (2g) is built-in overcurrent runner (2e) axially, insertion sealer body (2g) upper end arranges water inlet (2n) and is communicated with overcurrent runner (2e), insertion sealer body (2g) lower end sets out the mouth of a river (2o) and is communicated with overcurrent runner (2e), water inlet piston (2d) is inlaid in the circular hole of overcurrent runner (2e) upper end, and water inlet piston (2d) upper surface is fixedly connected with water inlet spring (2a), arrange inlet seal pad (2c) between upper cover body (2b) lower surface and insertion sealer body (2g), upper cover body (2b) holds external screw thread to be connected with insertion sealer body (2g) box (2m), delivery port piston (2h) is inlaid in the circular hole of overcurrent runner (2e) lower end, delivery port piston (2h) lower surface is fixedly connected with delivery port spring (2i), set out mouth of a river sealing mat (2j) between lower cover (2k) upper surface and insertion sealer body (2g), lower cover (2k) holds external screw thread to be connected with insertion sealer body (2g) pin thread (2L), also comprise the using method utilizing above-mentioned two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string, realize especially by following steps,
The first step, described sleeve pipe precast sealed tube (3) and described sleeve pipe precast sealed tube (6) are being bored completion phase according to geologic requirements in advance with in production string lower going-into-well, sleeve pipe precast sealed tube (3) is preset at top, circle, first order water filling interval (14) top, and sleeve pipe precast sealed tube (6) is preset between first order water filling interval (14) and second level water filling interval (15);
Second step, under enter separate injection tubing string, by plug (11), screen casing (10), two ball seat (9), injection well downhole flow regulator (7), insertion sealer (5) and injection well downhole flow regulator (4) successively by sleeve pipe precast sealed tube (3), until insert sealer (5) and sleeve pipe precast sealed tube (6) realization insertion sealing, insert sealer (2) and sleeve pipe precast sealed tube (3) realization insertion sealing location, described sleeve pipe precast sealed tube (6) is positioned between injection well downhole flow regulator (4) and injection well downhole flow regulator (7); Bidirectional anchor (1) is placed in the top of inserting sealer (2), and two ball seat (9), screen casing (10) and plug (11) are placed in the bottom of oil pipe (8) successively;
3rd step, to insert sealer (2) is inserted among sleeve pipe precast sealed tube (3), to insert sealer (5) is inserted among sleeve pipe precast sealed tube (6), the multiple-sealed circle of described insertion sealer (2f) and described precast sealed tube realize inserting sealing, separate oil sets annular space and realize seperated layer water injection;
4th step, opens oil pipe Water filling valve, closes oil jacket annulus water injection valve, injects water through the often cover injection well downhole flow regulator of oil pipe and tubing string and injects oil pipe and casing annulus, inject water filling interval at different levels;
5th step, open oil jacket annulus water injection valve, close oil pipe Water filling valve, water is injected the oil pipe between insertion sealer (2) and insertion sealer (5) and casing annulus, promote to insert water inlet piston (2d) up compression water inlet spring (2a) in sealer (5), open water inlet (2n), inject water and enter overcurrent runner (2e), promote delivery port piston (2h) descending compression delivery port spring (2i), open delivery port (2o), inject water and enter the oil pipe and casing annulus that insert sealer (5) bottom, eventually pass screen casing (10), two ball seat (9) enters oil pipe (8), part water enters in oil pipe (8) through injection well downhole flow regulator (4) and injection well downhole flow regulator (7) simultaneously, realize separate injection tubing string anti-flushing well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110161008.2A CN102828732B (en) | 2011-06-15 | 2011-06-15 | Two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string and dispensing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110161008.2A CN102828732B (en) | 2011-06-15 | 2011-06-15 | Two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string and dispensing method thereof |
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| Publication Number | Publication Date |
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| CN102828732A CN102828732A (en) | 2012-12-19 |
| CN102828732B true CN102828732B (en) | 2015-09-23 |
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| CN201110161008.2A Active CN102828732B (en) | 2011-06-15 | 2011-06-15 | Two-stage two-segment back-washing well inserting seal sleeve protected separate injection tubing string and dispensing method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781506B (en) * | 2014-12-19 | 2018-08-10 | 中国石油天然气股份有限公司 | A kind of method of oil well delamination water filling |
| CN106939784A (en) * | 2017-01-13 | 2017-07-11 | 上海全泽能源科技有限公司 | The positioning acidizing device of stratified injection well |
| CN113356813B (en) * | 2021-07-13 | 2022-09-09 | 中国石油化工股份有限公司 | Pressure drive injector, using pipe column and multi-round sub-layer pressure drive method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4625813A (en) * | 1985-06-17 | 1986-12-02 | Trivedi Arvind J | Method and apparatus for coring in subaqueous structures |
| CN2490313Y (en) * | 2001-04-27 | 2002-05-08 | 向志全 | High-pressure squeezing packer |
| CN2635917Y (en) * | 2003-08-01 | 2004-08-25 | 中国石化胜利油田有限公司采油工艺研究院 | Back wash device for mechanical sand prevention water injection well |
| CN2903354Y (en) * | 2005-12-01 | 2007-05-23 | 大庆油田有限责任公司 | Pressing crack saling working drum |
| CN2906054Y (en) * | 2006-06-23 | 2007-05-30 | 长葛市福侨电器材料厂 | Anti-sand anti-backflow and anti-fouling multifunctional eccentric separated-zone water injection string |
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2011
- 2011-06-15 CN CN201110161008.2A patent/CN102828732B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4625813A (en) * | 1985-06-17 | 1986-12-02 | Trivedi Arvind J | Method and apparatus for coring in subaqueous structures |
| CN2490313Y (en) * | 2001-04-27 | 2002-05-08 | 向志全 | High-pressure squeezing packer |
| CN2635917Y (en) * | 2003-08-01 | 2004-08-25 | 中国石化胜利油田有限公司采油工艺研究院 | Back wash device for mechanical sand prevention water injection well |
| CN2903354Y (en) * | 2005-12-01 | 2007-05-23 | 大庆油田有限责任公司 | Pressing crack saling working drum |
| CN2906054Y (en) * | 2006-06-23 | 2007-05-30 | 长葛市福侨电器材料厂 | Anti-sand anti-backflow and anti-fouling multifunctional eccentric separated-zone water injection string |
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| CN102828732A (en) | 2012-12-19 |
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