CN201347745Y - Polymer flooding casing-deformation small-diameter separate zone injection tubular column - Google Patents
Polymer flooding casing-deformation small-diameter separate zone injection tubular column Download PDFInfo
- Publication number
- CN201347745Y CN201347745Y CNU2008202117700U CN200820211770U CN201347745Y CN 201347745 Y CN201347745 Y CN 201347745Y CN U2008202117700 U CNU2008202117700 U CN U2008202117700U CN 200820211770 U CN200820211770 U CN 200820211770U CN 201347745 Y CN201347745 Y CN 201347745Y
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- China
- Prior art keywords
- tubular column
- injection
- casing
- polymer
- separate zone
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Abstract
The utility model relates to a polymer flooding casing-deformation small-diameter separate zone injection tubular column, which mainly resolves problems that the existing polymer flooding tubular columns are poor in sealing effect and high in loss of polymer viscosity. The tubular column is characterized in that inner sides of the upper portion and the lower portion of a rubber cylinder (14) are in step shapes and a plurality of reverse-U-shaped spacer plates (25) are arranged in an injection cavity (24). The polymer folding casing-deformation small-diameter separate zone injection tubular column has the advantages of fine sealing effects and low loss of polymer viscosity.
Description
Technical field:
The utility model belongs to oil recovery field, oil field, relates in particular to a kind of poly-driving and overlaps the diameter layering injection string that diminishes.
Background technology:
Polymer displacement of reservoir oil becomes the major technique support that the old liberated area, oil field keeps stable yields to improve the big and good in economic efficiency characteristics of oil recovery factor amplitude.Gather and drive eccentric zonal injection technology technology satisfied sticking undermining under the prerequisite of injection allocation amount, the poly-dispensing of driving that can realize different progression requires and realizes poly-drive preceding seperated layer water injection and the same tubing string of layered polymer injection, this technology proves by laboratory test and field trial, can satisfy poly-requirement of driving dispensing preferably, effect is better.But in the job execution process, find, most of well is because casing deformation can't be carried out layering, and use at present poly-ly drive eccentric zonal injection technology technology and can't satisfy the casing deformation well layering and inject, and sealing effectiveness is low behind the existing expanding pony packer well-flushing, the compression packer sealing effectiveness is poor, influenced the poly-development effectiveness of driving, and the straight chamber structure of existing injection allocation device easily causes the viscosity loss of polymer.
The utility model content:
In order to overcome the above-mentioned deficiency of prior art, the utility model provides a kind of poly-cover diameter layering injection string that diminishes that drives, and this is poly-to drive the cover diameter layering injection string that diminishes and have good sealing effect, the low characteristics of polymer viscosity loss.
The technical solution of the utility model is: a kind of poly-driving overlapped the diameter layering injection string that diminishes, comprise packer and injection allocation device that several are connected with oil pipe at interval, described packer comprises packing element, described injection allocation device comprises the fluid injection chamber, inboard, packing element upper and lower part is stairstepping, and some inverted U dividing plates are arranged in the fluid injection chamber.
The utlity model has following beneficial effect: owing to take such scheme, poly-drive the packer that cover diminishes in the diameter layering injection string and adopt expanding packing element and the method that compression packer well-flushing structure combines, solved the low problem that reaches compression type packer tubling sealing effectiveness difference of sealing effectiveness behind the expanding pony packer well-flushing; And in the fluid injection chamber of injection allocation device because several inverted U dividing plates are installed, form the labyrinth type cavity, reduced the viscosity loss of polymer effectively.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model;
Accompanying drawing 2 is structural representations of packer in the utility model;
Accompanying drawing 3 is structural representations of injection allocation device in the utility model.
1-packer among the figure, 2-injection allocation device, 3-oil pipe, 4-screen casing, the 11-top connection, 12-well-flushing piston, 13-release pin, the 14-packing element, 15-exterior central tube, 16-central tube, the 17-support, 18-ball-and-seat, 19-lower contact, the top connection of 21-injection allocation device, 22-pressure-bearing cover, 23-main body, 24-fluid injection chamber, 25-dividing plate, the lower contact of 26-injection allocation device.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
By shown in Figure 1, a kind of poly-driving overlapped the diameter layering injection string that diminishes, and comprises several packers 1 and injection allocation device 2, and the two (1,2) arranges that at interval be connected with oil pipe 3, the tubing string bottom is a screen casing 4.
By shown in Figure 2, described packer 1 is by last, lower contact (11,19) be connected with oil pipe 3, connect central tube 16 inside and outside the top connection 11 times respectively and go up seating nipple, it between the two well-flushing piston 12, described packer 1 also comprises packing element 14, on the packing element 14, the bottom is stairstepping, make and form one section cavity between itself and the exterior central tube 15, this section cavity makes packing element 14 can rely on the pressure distending of liquid, realizes sealing, and, the liquid of tubing string inside can enter the space between central tube 16 and the following seating nipple, compression ball-and-seat 18 compressed stent 17, thus compression discharges cover, discharges cover and upwards compresses packing element 14 again, make packing element 14 distendings, further realize sealing.During deblocking, the upper lifting pipe post, because the frictional force of packing element 14 and sleeve pipe is cut off release pin, packer 1 deblocking.Therefore, poly-drive the method that pony packer adopts expanding packing element 14 to combine with compression packer well-flushing structure, solved the low problem that reaches compression type packer tubling sealing effectiveness difference of sealing effectiveness behind the simple expanding pony packer well-flushing.
By shown in Figure 3, described injection allocation device 2 is by the upper and lower joint (21 of injection allocation device, 26) be connected with oil pipe 3, top connection 21 bottoms connect pressure-bearing cover 22, pressure-bearing cover inside is centralizer body, pressure-bearing cover 22 is with portion's main body 23 that is threaded, there is off-centre that fluid injection chamber 24 is arranged in the main body 23, several inverted U dividing plates 25 are arranged in the fluid injection chamber 24, dividing plate 25 makes fluid injection chamber 24 form maze-type structure, and this structure has reduced the viscosity loss of polymer to greatest extent, has improved the utilization rate of polymer, can satisfy the poly-requirement of driving dispensing of minor diameter, and the branch number of levels is not limited by the interval number.
Should poly-drive and overlap the diameter layering injection string employing suspension type that diminishes, the reliability of tubing string sealing and the efficient of polymer displacement of reservoir oil have been improved on the whole, solved poly-drive cover become can not layering practical problem, provide technical support preferably for gathering to drive to develop, had popularizing application prospect and economic benefit preferably.
Claims (1)
1, a kind of poly-driving overlapped the diameter layering injection string that diminishes, comprise packer (1) and injection allocation device (2) that several are connected with oil pipe (3) at interval, described packer (1) comprises packing element (14), described injection allocation device (2) comprises fluid injection chamber (24), it is characterized in that: packing element (14) inboard, upper and lower part is stairstepping, and some inverted U dividing plates (25) are arranged in fluid injection chamber (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202117700U CN201347745Y (en) | 2008-12-21 | 2008-12-21 | Polymer flooding casing-deformation small-diameter separate zone injection tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202117700U CN201347745Y (en) | 2008-12-21 | 2008-12-21 | Polymer flooding casing-deformation small-diameter separate zone injection tubular column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201347745Y true CN201347745Y (en) | 2009-11-18 |
Family
ID=41367217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202117700U Expired - Fee Related CN201347745Y (en) | 2008-12-21 | 2008-12-21 | Polymer flooding casing-deformation small-diameter separate zone injection tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201347745Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250668A (en) * | 2021-06-18 | 2021-08-13 | 东营政阳自动化科技有限公司 | High-stability injection allocation device for oil field underground |
-
2008
- 2008-12-21 CN CNU2008202117700U patent/CN201347745Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250668A (en) * | 2021-06-18 | 2021-08-13 | 东营政阳自动化科技有限公司 | High-stability injection allocation device for oil field underground |
| CN113250668B (en) * | 2021-06-18 | 2021-10-22 | 牡丹江市井田石油钻采配件有限公司 | High-stability injection allocation device for oil field underground |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20171221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |