CN202117648U - One-level two-segment insert-seal injection-divided tubular pile capable of backwashing wells - Google Patents
One-level two-segment insert-seal injection-divided tubular pile capable of backwashing wells Download PDFInfo
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- CN202117648U CN202117648U CN2011202017329U CN201120201732U CN202117648U CN 202117648 U CN202117648 U CN 202117648U CN 2011202017329 U CN2011202017329 U CN 2011202017329U CN 201120201732 U CN201120201732 U CN 201120201732U CN 202117648 U CN202117648 U CN 202117648U
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- flow regulator
- tubular pile
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Abstract
The utility model relates to a one-level two-segment insert-seal injection-divided tubular pile capable of backwashing wells, which is used for water injection in oil industries. The one-level two-segment insert-seal injection-divided tubular pile comprises a water well two-way anchor (1), a water flow regulator (2), an insert sealer (3), a sleeve prefabricated sealing cylinder (4), a first-level water-injection layer segment (12), a second-level water-injection layer segment (13) and the like, wherein the sleeve prefabricated sealing cylinder (4) is arranged between the first-level water-injection layer segment (12) and the second-level water-injection layer segment (13) and is meanwhile arranged between the water flow regulator (2) and a water flow regulator (5); and the insert sealer (3) is arranged in the sleeve prefabricated sealing cylinder (4). The one-level two-segment insert-seal injection-divided tubular pile capable of backwashing the wells provided by the utility model has the advantages that: the occurrence of the phenomenon of fluid channeling can be avoided; the injection-divided tubular pile is suitable for high-temperature high-pressure deep deflecting wells; for wells with easy sand production, the injection-divided tubular pile has a high success ratio for removing sand blockage, thus the probability of the risk of overhauling is lowered; the success ratio for throwing-fishing and measuring-regulating is high; and the injection-divided tubular pile has a simple structure, small investment, repeatability in use and long useful life.
Description
Technical field
The utility model provides a kind of petroleum industry water filling to insert the sealing separate injection tubing string with two sections back-washable wells of one-level.
Background technology
At present, each oil field in multilayered reservoir waterflooding extraction process, is generally used separate injection tubing string for improving the oil field development benefit.Separate injection tubing string mainly comprises packer, injection well downhole flow regulator, the two-way anchor of well, two ball seat, screen casing, plug etc., during normal water filling, injects water and gets into the stratum from oil pipe through injection well downhole flow regulator, generally can satisfy a minute notes demand.But separate injection tubing string setted structure imperfection; Also have following four deficiencies: (1) packer well-washing passage is less, and when water quality or hole condition were relatively poor, granule foreign was prone to be trapped in the well-flushing passage; Cause on the one hand the well-flushing passage to take place to stop up and can't well-flushing; Also can cause the flushing valve card on the other hand or be not closed completely, cause packer to occur channelling up and down, influence divides annotates an effect; (2) for the water injection well that is prone to shake out, separate injection tubing string is prone to that sand buries, the sand card, and the overhaul probability is high; (3) latus rectum is less in the packer central tube, and pulling is surveyed and joined the instrument card that is hampered easily, has reduced the pulling survey and has been made into power; (4) the dark inclined shaft of HTHP is complicated with packer construction, costs an arm and a leg, and cost is high.
The utility model content
The purpose of the utility model is to provide a kind of petroleum industry water filling to insert the sealing separate injection tubing strings with the back-washable wells of two sections of one-levels, can effectively avoid the flushing valve card or is not closed completely and makes packer occur channelling up and down; For easy sand output well, separate desanding card success rate height, reduced the overhaul probability; Pulling is surveyed and is made into the power height; Tubing string is strong, reusable for being prone to the big dark inclined shaft compliance of HTHP of sand output well, corrosion and scaling well, water injection pressure height and interlayer difference, few easy workout part, and period of validity is long.
The purpose of the utility model be achieved in that comprise the two-way anchor of well 1, injection well downhole flow regulator 2, insert sealer 3, the prefabricated sealing drum of sleeve pipe 4, injection well downhole flow regulator 5, oil pipe 6, two ball seat 7, screen casing 8, plug 9, sleeve pipe 10, artificial bottom of a well 11, first order water filling interval 12, second level water filling interval 13; It is characterized in that: the prefabricated sealing drum 4 of sleeve pipe places between first order water filling interval 12 and the second level water filling interval 13; The prefabricated sealing drum 4 of sleeve pipe places between injection well downhole flow regulator 2 and the injection well downhole flow regulator 5 simultaneously; Inserting sealer 3 places in the middle of the prefabricated sealing drum 4 of sleeve pipe; The two-way anchor 1 of well places the top of injection well downhole flow regulator 2, and two ball seat 7, screen casing 8 and plug 9 place the bottom of oil pipe 6 successively; Insert sealer 3 built-in anti-flushing well passages, external multiple-sealed circle.
The advantage of the utility model is: insert sealer and be provided with the anti-flushing well passage, the well-flushing passage is big on the one hand, should not be stopped up by granule foreign, and flushing valve is closed easily on the other hand, has avoided the channelling phenomenon; Tubing string adopts and directly inserts sealing means, for easy sand output well, separates desanding card success rate height, has reduced the overhaul risk; It is big to insert the interior latus rectum of sealer central tube, and pulling is surveyed and is made into the power height; Tubular column structure is simple, small investment, and few easy workout part, period of validity is long, inserts the prefabricated sealing drum reparation of sealer and sleeve pipe and changes conveniently, and is reusable; Tubing string is strong for being prone to the big dark inclined shaft compliance of HTHP of sand output well, corrosion and scaling well, water injection pressure height and interlayer difference.
Description of drawings
Fig. 1 is the structural representation of the utility model.
The specific embodiment
Shown in accompanying drawing, the prefabricated sealing drum 4 of sleeve pipe is lowered to and is preset at correct position at the brill completion phase according to geologic requirements in advance with production string, and the prefabricated sealing drum 4 of sleeve pipe is preset between first order water filling interval 12 and the second level water filling interval 13.
When being lowered to water injection string, assembly separate injection tubing string, downhole tools such as plug 9, screen casing 8, two ball seat 7 and injection well downhole flow regulator 5 realize insert sealing location until inserting sealer 3 with the prefabricated sealing drum 4 of sleeve pipe successively through the prefabricated sealing drum 4 of sleeve pipe; Insert sealer 3 and be inserted in the prefabricated sealing drum 4 of sleeve pipe, between first order water filling interval 12 and second level water filling interval 13, simultaneously; Between injection well downhole flow regulator 2 and injection well downhole flow regulator 5; Can realize that two intervals divide notes, wherein injection well downhole flow regulator 2 is given 12 water fillings of first order water filling interval, and injection well downhole flow regulator 5 is given 13 water fillings of second level water filling interval; The two-way anchor 1 of well is on the top of injection well downhole flow regulator 2, and two ball seat 7, screen casing 8 and plug 9 are positioned at the bottom of oil pipe 6 successively.
Insert sealer and be provided with the anti-flushing well passage; During normal water filling; Oil pressure is greater than casing pressure; The anti-flushing well passage water inlet and the delivery port that insert sealer 3 are in closed condition, inject water and get into oil pipe and sleeve pipe annular space from oil pipe through every cover injection well downhole flow regulator of tubing string, get into each water filling interval by oil pipe and sleeve pipe annular space again; When pit shaft needed anti-flushing well, casing pressure inserted anti-flushing well passage water inlet piston stroking upward compression water inlet spring in the sealer 3 greater than oil pressure; Water inlet is opened; Inject water and get into the anti-flushing well passage, make delivery port descent of piston compression delivery port spring, delivery port is opened; Inject water and get into oil pipe and the sleeve pipe annular space that inserts sealer 3 bottoms; Get into oil pipe 6 through screen casing 8, two ball seat 7 at last, part water gets into oil pipe 6 inside through injection well downhole flow regulator 2 and injection well downhole flow regulator 5 simultaneously, thereby realizes separate injection tubing string anti-flushing well function.
Claims (1)
1. two sections back-washable wells of one-level insert the sealing separate injection tubing string; Comprise the two-way anchor of well (1), injection well downhole flow regulator (2), insert sealer (3), the prefabricated sealing drum of sleeve pipe (4), injection well downhole flow regulator (5), oil pipe (6), two ball seat (7), screen casing (8), plug (9), sleeve pipe (10), artificial bottom of a well (11), first order water filling interval (12), second level water filling interval (13); It is characterized in that: the prefabricated sealing drum of sleeve pipe (4) places between first order water filling interval (12) and the second level water filling interval (13); The prefabricated sealing drum of sleeve pipe (4) places between injection well downhole flow regulator (2) and the injection well downhole flow regulator (5) simultaneously; Inserting sealer (3) places in the middle of the prefabricated sealing drum of sleeve pipe (4); The two-way anchor of well (1) places the top of injection well downhole flow regulator (2), and two ball seats (7), screen casing (8) and plug (9) place the bottom of oil pipe (6) successively; Insert the built-in anti-flushing well passage of sealer (3), external multiple-sealed circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202017329U CN202117648U (en) | 2011-06-15 | 2011-06-15 | One-level two-segment insert-seal injection-divided tubular pile capable of backwashing wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202017329U CN202117648U (en) | 2011-06-15 | 2011-06-15 | One-level two-segment insert-seal injection-divided tubular pile capable of backwashing wells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202117648U true CN202117648U (en) | 2012-01-18 |
Family
ID=45458721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202017329U Expired - Lifetime CN202117648U (en) | 2011-06-15 | 2011-06-15 | One-level two-segment insert-seal injection-divided tubular pile capable of backwashing wells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202117648U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481484A (en) * | 2014-12-26 | 2015-04-01 | 东营市福利德石油科技开发有限责任公司 | Horizontal well segmented intermittent steam huff and puff injection-production integrated pipe column |
| CN107120079A (en) * | 2017-06-14 | 2017-09-01 | 中国石油天然气股份有限公司 | A kind of dropping in and taking off type inverse well-flushing valve |
-
2011
- 2011-06-15 CN CN2011202017329U patent/CN202117648U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481484A (en) * | 2014-12-26 | 2015-04-01 | 东营市福利德石油科技开发有限责任公司 | Horizontal well segmented intermittent steam huff and puff injection-production integrated pipe column |
| CN107120079A (en) * | 2017-06-14 | 2017-09-01 | 中国石油天然气股份有限公司 | A kind of dropping in and taking off type inverse well-flushing valve |
| CN107120079B (en) * | 2017-06-14 | 2020-09-18 | 中国石油天然气股份有限公司 | Throwing and fishing type back flushing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |