CN201090198Y - One-stage two-section separate injection string capable of preventing water injection layer section from reverse-discharge and channeling - Google Patents
One-stage two-section separate injection string capable of preventing water injection layer section from reverse-discharge and channeling Download PDFInfo
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- CN201090198Y CN201090198Y CNU2007201497290U CN200720149729U CN201090198Y CN 201090198 Y CN201090198 Y CN 201090198Y CN U2007201497290 U CNU2007201497290 U CN U2007201497290U CN 200720149729 U CN200720149729 U CN 200720149729U CN 201090198 Y CN201090198 Y CN 201090198Y
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 238000002347 injection Methods 0.000 title claims abstract description 56
- 239000007924 injection Substances 0.000 title claims abstract description 56
- 230000005465 channeling Effects 0.000 title abstract 2
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 238000011010 flushing procedure Methods 0.000 claims description 19
- 239000000446 fuel Substances 0.000 claims description 12
- 239000004576 sand Substances 0.000 abstract description 4
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000005406 washing Methods 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 3
- 238000005259 measurement Methods 0.000 abstract 1
- 239000003129 oil well Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 17
- 238000005086 pumping Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
A first-stage two-section separate injection string for preventing water injection layer section from reverse-flow and channeling for a petroleum industry water injection string comprises a first-stage reverse-flow prevention eccentric water distributor (1), a first-stage non-reverse-flow-prevention well compression packer (2), a separate injection oil pipe (5) and the like, wherein the first-stage non-reverse-flow-prevention well compression packer (2) is positioned between an upper water injection layer section (9) and a lower water injection layer section (10), the first-stage non-reverse-flow-prevention well compression packer (2) is simultaneously positioned between the first-stage reverse-flow prevention eccentric water distributor (1) and the second-stage reverse-flow prevention eccentric water distributor (4), a support hydraulic slip (3) is arranged at the lower part of the first-stage non-reverse-flow-prevention well compression packer (2), injected water can only flow in a single direction in the separate injection string for preventing section; the throwing and fishing measurement has high preparation power, and the well washing is not needed, so the labor intensity of workers can be reduced; the pipe column has strong adaptability to thick oil wells, sand producing wells and profile control post-injection wells, medium and shallow wells with low water injection pressure and large interval pressure difference, and the pipe column has long injection period.
Description
Technical field
The utility model provides a kind of petroleum industry water injection string to prevent the anti-channelling separate injection tubing string of telling of water filling interval with two sections of one-levels.
Background technology
At present, each oil field uses eccentric separate layer water injection string very general in middle shallow well multilayered reservoir waterflooding extraction process, and proportion is more than 80%.The applied dispensing instrument of two sections eccentric separate injection tubing strings of one-level mainly contains eccentric injection mandrel, packer, support waterpower slips, two ball seat, screen casing, plug etc.During normal water filling, water filling can normally enter the stratum from oil pipe through eccentric injection mandrel, satisfies the dispensing needs.But, because the imperfection of eccentric separate injection tubing string setted structure, in case termination of pumping stops annotating, have following 3 aspect problems: 1. for most of open type eccentric injection mandrel, the water that injects the stratum will be by eccentric injection mandrel by anti-low water filling interval of channelling entrance pressure power or the ground main line told of the high water filling interval of pressure; 2. because the design of the dispensing packer of most of wells has the backwash passage, during normal water filling, oil pressure is greater than casing pressure, flushing valve is closed, after termination of pumping stops annotating, oil pressure is less than or equal to casing pressure, and flushing valve can be opened, and the water that injects the stratum also can be by the packer well-washing passage by anti-low water filling interval of channelling entrance pressure power or the ground main line told of the high water filling interval of pressure; 3. two ball seats are ball-and-seat, can not effectively stop the two-way flow of water.Because eccentric separate injection tubing string fails effectively to solve the anti-channelling problem of telling of separate injection interval, inject that water instead tells that channelling can cause not only pulling to survey to be made into that power is low, flushing valve card, ball-and-seat ball seat are not closed completely, formation sand production shortens the separate injection tubing string period of validity and workover treatment, but also damage stratum energy, reduce flood effectiveness, directly affect the raising of oil field oil recovery economic benefit.
Summary of the invention
The purpose of this utility model is to provide a kind of petroleum industry water injection string to prevent the anti-channelling separate injection tubing string of telling of water filling interval with two sections of one-levels, it can effectively avoid injecting water in the anti-generation of telling the channelling phenomenon of interval injecting water preventing that the anti-channelling separate injection tubing string of telling of interval can only way flow; Pulling is surveyed and is made into the power height, and does not need well-flushing, can alleviate working strength of workers; Tubing string for heavy oil wells, sand output well, profile control after dispensing well, water injection pressure is lower and interval pressure reduction is bigger middle shallow well compliance strong, tubing string dispensing period of validity is long.
The purpose of this utility model is achieved in that
Comprise that the one-level counnter attack tells eccentric injection mandrel 1, one-level can not anti-flushing well compression packer 2, support waterpower slips 3, eccentric injection mandrel 4 is told in the secondary counnter attack, divide oil fuel tube 5, plug 6, last water filling interval 9, the water layer section 10 of making a bet, one-level can not anti-flushing well compression packer 2 at last water filling interval 9 with make a bet between the water layer section 10, one-level can not the anti-flushing well compression packer 2 be told eccentric injection mandrel 1 and the secondary counnter attack is told between the eccentric injection mandrel 4 in the one-level counnter attack simultaneously, in the branch oil fuel tube 5 the one-level counnter attack is housed respectively and tells eccentric injection mandrel 1, eccentric injection mandrel 4 is told in the secondary counnter attack, support waterpower slips 3 and place the bottom that one-level can not anti-flushing well compression packer 2, divide the bottom of oil fuel tube 5 that plug 6 is housed.
Advantage of the present utility model is: 1. inject water preventing that the anti-channelling separate injection tubing string of telling of interval can only way flow, can effectively avoid injecting water in the anti-generation of telling the channelling phenomenon of interval; 2. pulling is surveyed and is made into the power height, and does not need well-flushing, can alleviate working strength of workers; Tubing string for heavy oil wells, sand output well, profile control after dispensing well, water injection pressure is lower and interval pressure reduction is bigger middle shallow well compliance strong, tubing string dispensing period of validity is long.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
As shown in drawings, comprise that the one-level counnter attack tells eccentric injection mandrel 1, one-level can not anti-flushing well compression packer 2, support waterpower slips 3, eccentric injection mandrel 4 is told in the secondary counnter attack, divide oil fuel tube 5, plug 6, last water filling interval 9, the water layer section 10 of making a bet, one-level can not anti-flushing well compression packer 2 not only at last water filling interval 9 with make a bet between the water layer section 10, and tell eccentric injection mandrel 1 and the secondary counnter attack is told between the eccentric injection mandrel 4 in the one-level counnter attack, the one-level counnter attack is told eccentric injection mandrel 1 and is given last water filling interval 9 water fillings, the secondary counnter attack is told eccentric injection mandrel 4 and is given water layer section 10 water fillings of making a bet, support waterpower slips 3 in the bottom of the back-washable well compression packer 2 of one-level not, plug 6 is positioned at the bottommost of oil pipe 5.Can be as required one-level can not anti-flushing well compression packer 2 top add oil pipe telescopic compensator, the two-way anchor of well.Used eccentric injection mandrel is counnter attack and tells eccentric injection mandrel, used packer is can not the anti-flushing well compression packer, during normal water filling, water filling can only be told eccentric injection mandrel 1, secondary counnter attack from the one-level counnter attack of minute oil fuel tube 5 through tubing string and be told eccentric injection mandrel 4 and flow into and divide oil fuel tubes 5 and sleeve pipe 7 to form annular spaces, again by minute oil fuel tube 5 and sleeve pipe 7 annular spaces enter water filling interval 9, the water layer section 10 of making a bet.In case termination of pumping stops annotating, the one-level counnter attack tells that eccentric injection mandrel 1, secondary counnter attack are told eccentric injection mandrel 4, plug 6 can effectively stop the branch oil fuel tube 5 and the water of sleeve pipe 7 annular spaces to enter the branch oil fuel tube, prevent water filling interval 9, the water layer section of making a bet 10 counter telling, one-level can not the anti-flushing well compression packer 2 owing to there is not the well-flushing passage, the sealing mechanism of packer can play effective packing effect between the water filling interval, prevent from that the water filling interval is counter to tell channelling.
Claims (1)
1. one-level prevents the anti-channelling separate injection tubing string of telling of water filling interval for two sections, comprise that the one-level counnter attack tells eccentric injection mandrel (1), one-level can not anti-flushing well compression packer (2), support waterpower slips (3), eccentric injection mandrel (4) is told in the secondary counnter attack, divide oil fuel tube (5), plug (6), last water filling interval (9), the water layer section of making a bet (10), it is characterized in that: one-level can not anti-flushing well compression packer (2) be positioned at water filling interval (9) and makes a bet between the water layer section (10), one-level can not anti-flushing well compression packer (2) be positioned at simultaneously that eccentric injection mandrel (1) is told in the one-level counnter attack and the secondary counnter attack is told between the eccentric injection mandrel (4), in the branch oil fuel tube (5) the one-level counnter attack is housed respectively and tells eccentric injection mandrel (1), eccentric injection mandrel (4) is told in the secondary counnter attack, support waterpower slips (3) and place the bottom that one-level can not anti-flushing well compression packer (2), divide the bottom of oil fuel tube (5) that plug (6) is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201497290U CN201090198Y (en) | 2007-06-20 | 2007-06-20 | One-stage two-section separate injection string capable of preventing water injection layer section from reverse-discharge and channeling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201497290U CN201090198Y (en) | 2007-06-20 | 2007-06-20 | One-stage two-section separate injection string capable of preventing water injection layer section from reverse-discharge and channeling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201090198Y true CN201090198Y (en) | 2008-07-23 |
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ID=39861958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201497290U Expired - Lifetime CN201090198Y (en) | 2007-06-20 | 2007-06-20 | One-stage two-section separate injection string capable of preventing water injection layer section from reverse-discharge and channeling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201090198Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321035A (en) * | 2016-10-09 | 2017-01-11 | 中国石油化工股份有限公司 | Full-shaft flowback-preventing separated layer water injection tubular column |
-
2007
- 2007-06-20 CN CNU2007201497290U patent/CN201090198Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321035A (en) * | 2016-10-09 | 2017-01-11 | 中国石油化工股份有限公司 | Full-shaft flowback-preventing separated layer water injection tubular column |
| CN106321035B (en) * | 2016-10-09 | 2021-04-23 | 中国石油化工股份有限公司 | Full well bore is prevented returning and is told layering water injection tubular column |
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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: 20080723 |