CN203905910U - Ground-flow-free water injection string - Google Patents
Ground-flow-free water injection string Download PDFInfo
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- CN203905910U CN203905910U CN201420271863.8U CN201420271863U CN203905910U CN 203905910 U CN203905910 U CN 203905910U CN 201420271863 U CN201420271863 U CN 201420271863U CN 203905910 U CN203905910 U CN 203905910U
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- water injection
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- screen casing
- string
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Abstract
The utility model relates to a ground-flow-free water injection string, in order to overcome the defect that exhausted exploitation is performed on oilfields and original oil in place is not developed effectively due to the fact that a ground water injection system is constructed unconditionally in the process of existing remote location block and small fault block oilfield development. A plug, a tubing pup joint, a sieve tube I, another tubing pup joint, a packer I, a release sub, a plug-in sealing device, an electric submersible pump, a protector, a motor, a motor compensator, a sieve tube II, a packer II, a flow testing assembly and a sieve tube III of the water injection string are connected sequentially from bottom to top. The sieve tube I is located in a water injection layer, and a stratum corresponding to the sieve tube III is a water exploitation layer. The ground-flow-free water injection string has the advantages that the string is reasonable in structure, a technique is effective, water injection exploitation can be implemented without constructing a ground water injection system in the process of remote block and small block development, recovery ratio and rate of oil production are increased effectively, cost of water injection is lowered greatly, and good economical efficiency is achieved.
Description
Technical field
The utility model relates to a kind of water injection technological string, especially relates to a kind of water injection string without ground flow.
Background technology
By water injection well, to oil-bearing stratum flooding makeup energy, keeping formation pressure, is to rely on after natural energy carries out primary oil recovery, or an important oil reservoir development technology being widely adopted for improving recovery ratio and rate of oil production in early days of oil field development.The ground flood pattern in oil field, is that injected water is improved to pressure by high pressure water-injection pump at present, it is reached after the required pressure of water filling, then deliver to each distributing room for water injection by water knockout drum and waterline, by distributing room for water injection, moisture is fitted on to each water injection well and injects oil reservoir.
Along with deepening continuously of oil field development, in outlying block, minor block oilfield development process, because ground injection pipe network does not match, or limited by ground condition, can not supporting ground flood pattern, cannot implement the waterflooding extraction in oil field, oil in-place can not get effective exploitation, make oil field in exhausted formula exploitation, affect the development benefit in oil field.
Utility model content
In order to overcome in existing outlying block, minor block oilfield development process, because unconditionally setting up ground flood pattern, cause oil field to carry out exhausted formula exploitation, oil in-place can not get the deficiency of effective exploitation, and the utility model provides a kind of water injection string without ground flow.
The utility model solves the technical scheme that its technical problem adopts: the water injection string without ground flow comprises screen casing, oil pipe, motor, submersible electric pump, cable, protector, packer, tubing nipple, plug, pit shaft is formed by sleeve pipe and artificial bottom of a well, there is water filling layer pit shaft lower end, water injection string is positioned at pit shaft bottom, and plug, tubing nipple, screen casing I, tubing nipple, packer I, back-off sub, sealing intubate, submersible electric pump, protector, motor, compensator of motor, screen casing II are fixedly connected sequentially from the bottom to top; There is radially intake the pump housing upper end of submersible electric pump; Screen casing I is positioned at the water filling layer place of pit shaft bottom; Screen casing II upper end be fixedly connected sequentially packer II, flow rate test assembly, screen casing III; Stratum corresponding to screen casing III is water harvesting layer.
Packer I is back-off packer, and packer II is cup packer.
The beneficial effects of the utility model are, tubular column structure is reasonable, process is effective, in outlying block, block of cells development process, without building ground flood pattern, can implement water flooding recovery operation, effectively improve recovery ratio and rate of oil production, greatly reduce water filling operating cost, there is good economy.
Accompanying drawing explanation
Fig. 1 is without the water injection string structural representation of ground flow in the utility model.
In figure: 1. oil pipe, 2. cable, 3. screen casing III, 4. flow rate test assembly; 5. packer II, 6. screen casing II, 7. compensator of motor, 8. motor; 9. protector, 10. Pump Suction Nozzle, 11. submersible electric pumps; 12. sealing intubate, 13. back-off subs, 14. packer I; 15. screen casing I, 16. tubing nipples, 17. plugs; 18. artificials bottom of a well, 19. water harvesting layers, 20. implanted layers.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.But those skilled in the art should know, the utility model is not limited to the listed specific embodiment, as long as meet spirit of the present utility model, all should be included in protection domain of the present utility model.
Referring to accompanying drawing 1.The utility model is formed by sleeve pipe and artificial bottom of a well 18 without the applied pit shaft of water injection string of ground flow, and there is water filling layer 20 pit shaft lower end, and water harvesting layer 19 is positioned at the top of water filling layer 20, and water injection string is placed between water filling layer 20 and water harvesting layer 19.
The plug 17 of water injection string, tubing nipple 16, screen casing I 15, packer I 14, back-off sub 13, sealing intubate 12, submersible electric pump 11, protector 9, motor 8, compensator of motor 7, packer II 5, flow rate test assembly 4, screen casing III 3, oil pipe 1 connect from the bottom to top successively, and there is radial pump intake 10 pump housing upper end of submersible electric pump 11; Screen casing I 15 is positioned at water filling layer 20 place of pit shaft bottom, and the stratum of screen casing III 3 correspondences is water harvesting layer 19.Packer I 14 is back-off packer, and packer II 5 is cup packer, the packer I 14 after setting, packer II 5 packing oil jacket annular spaces.
Flow rate test assembly 4 mainly comprises and is located pipe nipple, flow meter (pressure gauge), by wellhead cable, is lowered to flow meter or pressure gauge to being located pipe nipple, can monitor injection flow or the pressure of water filling layer, better to evaluate flood effectiveness.
Application the utility model, without the water injection technology method of ground flow water injection string, the steps include:
A, first, plug 17, tubing nipple 16, screen casing I 15, packer I 14 are fixedly connected sequentially from the bottom to top and form tubing string I, by back-off sub 13, tubing string I is connected with the oil pipe of upper end, by oil pipe, tubing string I is lowered in the sleeve pipe of pit shaft to projected depth, screen casing I 15 is positioned at implanted layer 20;
Then, set packer I 14, packing oil jacket annular space;
By back-off sub 13, realize again the disengaging of tubing string I and oil pipe; Oil pipe and back-off sub 13 are proposed from pit shaft;
B, back-off sub 13, sealing intubate 12, submersible electric pump 11, protector 9, motor 8, compensator of motor 7, packer II 5, flow rate test assembly 4, screen casing III 3 are fixedly connected sequentially from the bottom to top and form tubing string II, and be fixedly mounted on the lower end of oil pipe 1, by oil pipe 1, tubing string II is lowered in pit shaft; The stratum of screen casing III 3 correspondences is water harvesting layer 19; By back-off sub 13, dock with packer I 14;
Then, set packer II 5, packing oil jacket annular space;
C, starter motor 8 drive submersible electric pump 11 work, and the injected water of water harvesting layer 19 enters in water injection string through screen casing III 3, then through the radially weep hole of screen casing II 6, enter the oil jacket annular space of packer II 5 belows; Then, injected water enters in water injection string by the Pump Suction Nozzle 10 of below; Subsequently, injected water, is discharged target approach implanted layer 19 through submersible electric pump 11 pressurizations downwards finally by crossing screen casing I 15.
The utility model is mainly used in the oil field that is not suitable for building ground flood pattern because of ground condition complexity, or the minor block oilfield that do not match of ground injection pipe network, utilize in advance water injection string to pass through water harvesting layer pilot production, the injection test of water filling layer, in water harvesting layer 19 adopt that the water yield is stable reaches certain output, can meet the needs of implanted layer 20 injection rates, and the injection rate of implanted layer 20 is contentedly during plasmogamy note index, then carry out normal water filling operation.
During water filling operation, Surface power drive provides by power cable 2, starter motor 8, motor 8 drives submersible electric pump 11 high speed rotating, injected water enters water injection string by implanted layer through screen casing III 3 and flows downward, then the screen casing II 6 by packer II 5 belows enters the annular space between water injection string and sleeve pipe, Pump Suction Nozzle 10 between protector 9 and submersible electric pump 11 enters in water injection string again, injected water is through submersible electric pump 11 step by step after supercharging, screen casing I 15 by water injection string lower end is discharged, inject target water filling layer, thereby realize the object without ground flow water filling, there is good economy, practicality.
It should be noted that above-described embodiment is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiments and not depart from the claim scope of this patent.
Claims (2)
1. the water injection string without ground flow, comprise screen casing, oil pipe, motor, submersible electric pump, cable, protector, packer, tubing nipple, plug, pit shaft is formed by sleeve pipe and artificial bottom of a well, there is water filling layer pit shaft lower end, water injection string is positioned at pit shaft bottom, and plug, tubing nipple, screen casing I, tubing nipple, packer I, back-off sub, sealing intubate, submersible electric pump, protector, motor, compensator of motor, screen casing II are fixedly connected sequentially from the bottom to top; There is Pump Suction Nozzle radially the pump housing upper end of submersible electric pump; Screen casing I is positioned at the water filling layer place of pit shaft bottom, it is characterized in that: described screen casing II (6) upper end be fixedly connected sequentially packer II (5), flow rate test assembly (4), screen casing III (3); Stratum corresponding to described screen casing III (3) is water harvesting layer (19).
2. according to claim 1 without the water injection string of ground flow, it is characterized in that: described packer I (14) is back-off packer, and packer II (5) is cup packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420271863.8U CN203905910U (en) | 2014-05-24 | 2014-05-24 | Ground-flow-free water injection string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420271863.8U CN203905910U (en) | 2014-05-24 | 2014-05-24 | Ground-flow-free water injection string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203905910U true CN203905910U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420271863.8U Active CN203905910U (en) | 2014-05-24 | 2014-05-24 | Ground-flow-free water injection string |
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| CN (1) | CN203905910U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089571A (en) * | 2014-05-24 | 2015-11-25 | 天津大港油田钻采技术开发公司 | Water injection string without surface flow and water injection technological method of water injection string |
| CN105156340A (en) * | 2015-08-20 | 2015-12-16 | 天津市百成油田采油设备制造有限公司 | Inverse water-injection electric submersible pump system |
-
2014
- 2014-05-24 CN CN201420271863.8U patent/CN203905910U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089571A (en) * | 2014-05-24 | 2015-11-25 | 天津大港油田钻采技术开发公司 | Water injection string without surface flow and water injection technological method of water injection string |
| CN105156340A (en) * | 2015-08-20 | 2015-12-16 | 天津市百成油田采油设备制造有限公司 | Inverse water-injection electric submersible pump system |
| CN105156340B (en) * | 2015-08-20 | 2018-08-21 | 天津市百成油田采油设备制造有限公司 | A kind of inversion injecting submersible pump system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 300270 Tianjin Binhai New Area Dagang No.3 Hospital Co-patentee after: DAGANG OILFIELD GROUP Co.,Ltd. Patentee after: Tianjin Dagang Oilfield Petroleum Engineering Research Institute Drilling Technology Development Co.,Ltd. Address before: 300270 Tianjin Binhai New Area Dagang No.3 Hospital Co-patentee before: DAGANG OILFIELD GROUP Co.,Ltd. Patentee before: TIANJIN DAGANG OILFIELD PETROLEUM ENGINEERING RESEARCH INSTITUTE DRILLING AND PRODUCTION TECHNOLOGY DEVELOPMENT CO. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 300270 Tianjin Binhai New Area Dagang No.3 Hospital Co-patentee after: DAGANG OILFIELD GROUP Co.,Ltd. Patentee after: TIANJIN DAGANG OILFIELD PETROLEUM ENGINEERING RESEARCH INSTITUTE DRILLING AND PRODUCTION TECHNOLOGY DEVELOPMENT CO. Address before: No.3 Dagang Oilfield Hospital, Dagang District, Tianjin Co-patentee before: DAGANG OILFIELD GROUP Co.,Ltd. Patentee before: TIANJIN DAGANG OIL FIELD DRILLING TECHNOLOGY DEVELOPMENT CO. |
|
| CP03 | Change of name, title or address |