CN202954776U - Locating sealing device applied to horizontal water injection well layered seal and capable of back flushing and back injecting - Google Patents
Locating sealing device applied to horizontal water injection well layered seal and capable of back flushing and back injecting Download PDFInfo
- Publication number
- CN202954776U CN202954776U CN 201220630174 CN201220630174U CN202954776U CN 202954776 U CN202954776 U CN 202954776U CN 201220630174 CN201220630174 CN 201220630174 CN 201220630174 U CN201220630174 U CN 201220630174U CN 202954776 U CN202954776 U CN 202954776U
- Authority
- CN
- China
- Prior art keywords
- well
- sealing device
- sealing
- outer sleeve
- water injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a locating sealing device applied to horizontal water injection well layered seal and capable of back flushing and back injecting and belongs to the technical field of offshore oilfield horizontal water injection well layered seal. The locating sealing device applied to the horizontal water injection well layered seal and capable of back flushing and back injecting comprises an upper connector, an outer sleeve, a central pipe, a sealing element, a sealing plunger and a spring, wherein one end of the upper connector is used for being connected with an upper polymer injection pipe column, the other end of the upper connector is connected with the central pipe, and the other end of the central pipe is a lower connector which is used for being connected with a lower polymer injection pipe column. The outer sleeve, the sealing element, the sealing plunger and the spring are sequentially and coaxially arranged on the central pipe from the upper connector to the lower connector in a sleeved mode, an annular channel is formed between the outer sleeve and the central pipe, a liquid inlet hole is formed in the outer sleeve and communicated with the annular channel, and locating steps and a sealing ring are arranged on the outer sleeve. Due to the fact that the annular channel is designed to be used for back flushing a well and back injecting, through well back flushing and back injecting operation, viscous polymer which is horizontally injected into the pipe column and oil layer near well areas is removed, polymer injection pressure is reduced, polymer injection cost is saved, and production efficiency of an oilfield is improved.
Description
Technical field
The utility model relates to the anti-location sealing device of annotating of a kind of adaptation level water injection well layering sealing energy backwash, belongs to offshore oilfield horizontal flood well layering technical field of sealing technology.
Background technology
The horizontal injection well of offshore oilfield in long-term notes collecting process, due to the oil reservoir heterogeneity and polymer viscosity high, caused the horizontal segment injection string to be stopped up by the polymer solution that is injected, injection pressure rises, thereby causes injection rate to enter to fall, and annotates and is polymerized to this raising.Adopted sand control completion tubing string at the marine oil field horizontal well more, generally all adopted more than the horizontal segment of injection string location sealing is set, to realize the oil jacket annular isolation, the location sealing device that therefore needs a kind of capable of backwashing wells of design and can instead annotate.
Summary of the invention
The purpose of this utility model is to propose the anti-location sealing device of annotating of a kind of adaptation level water injection well layering sealing energy backwash, with backwash and the anti-notes of realizing the offshore oilfield injection string, and makes the injecting process sealing reliable.
The horizontal flood well layering sealing the utility model proposes, with the anti-sealing device of being doomed of backwash, comprises top connection, overcoat, central tube, seal, sealed plunger and spring; One end of described top connection is annotated poly-tubing string for the top that connects the horizontal flood well, and the other end of top connection is connected with central tube, and the other end of central tube is lower contact, and lower contact is annotated poly-tubing string for the bottom that connects the horizontal flood well; Described overcoat, seal, sealed plunger and spring successively from top connection to the lower contact coaxial package on central tube; Form circular passage between described overcoat and central tube, put outward and be provided with inlet opening, inlet opening is connected with circular passage, puts outward and is provided with positioning step and joint ring.
The horizontal flood well layering the utility model proposes anti-sealing device of being doomed of backwash for sealing, designed for anti-flushing well and anti-circular passage of annotating, reach the anti-operation of annotating by anti-flushing well, can remove the sticky polymers of horizontal injection string and oil reservoir near wellbore zone, reduce and annotate poly-pressure, save to annotate and be polymerized to this, raising field produces slope.
The accompanying drawing explanation
Fig. 1 is the horizontal flood well layering sealing that the utility model proposes with the anti-structural representation of being doomed a sealing device of backwash.
Fig. 2 is that this location sealing device is used view in down-hole.
In Fig. 1 and Fig. 2, the 1st, top connection, the 2nd, overcoat, 2-1 is inlet opening, 2-2 is positioning step, the 3rd, joint ring, the 4th, central tube, the 5th, circular passage, the 6th, seal, the 7th, sealed plunger, the 8th, spring, 4-1 is lower contact, the 9th, sleeve pipe, the 10th, the location packer, 10-1 is sealing light cylinder; The 11st, annotate poly-tubing string; The 12nd, horizontal segment is annotated poly-tubing string, the 13rd, horizontal segment sleeve pipe; The 14th, horizontal segment is annotated poly-tubing string outlet at bottom, the 15th, oil reservoir.
The specific embodiment
The horizontal flood well layering the utility model proposes anti-sealing device of being doomed of backwash for sealing, its structure as shown in Figure 1, comprises top connection 1, overcoat 2, central tube 4, seal 6, sealed plunger 7 and spring 8.One end of top connection 1 is annotated poly-tubing string 11 for the top that connects the horizontal flood well, and as shown in Figure 2, the other end of top connection 1 is connected with central tube 4.The other end of central tube 4 is lower contact 4-1, and lower contact 4-1 annotates poly-tubing string for the bottom that connects the horizontal flood well.Overcoat 2, seal 6, sealed plunger 7 and spring 8 successively from top connection 1 to lower contact 4-1 coaxial package on central tube 4.Form circular passage 5 between overcoat 2 and central tube 4, overcoat 2 is provided with inlet opening 2-1, and inlet opening 2-1 is connected with circular passage 5, and overcoat 2 is provided with positioning step 2-2 and joint ring 3.
Below in conjunction with accompanying drawing, introduce in detail the operating principle of this location sealing device:
When poly-as normal notes, this location sealing device can be realized effective sealing; For anti-flushing well the time, flushing fluid 5 is pushed seal 6 and supporting sealed plunger 7 downwards open by inlet opening 2-1 through circular passage, realizes anti-flushing well.When well-flushing finishes for water filling, under the spring-force driven dual of joint ring 3 place's annular pressures and spring 8, sealed plunger 7 and seal 6 reset, and circular passage 5 is sealed up.Anti-, annotate when poly-, operating principle is with backwash principle the same (backwash with the anti-difference of annotating is, during backwash, well head can efflux, and anti-notes do not have).
Fig. 2 is the use view of this location sealing device.By the anti-sealing device of being doomed of backwash, while being placed in the location packer 10 of the horizontal slanting section of pit shaft, the joint ring 3 on overcoat 2 coordinates with the sealing drum (10-1) of location packer 10, realizes horizontal segment and vertical section separation.During positive polymer waterflooding, liquid enters the horizontal segment tubing string from central tube 4 inside, and enter in the annular space between the poly-tubing string 12 of horizontal segment notes and horizontal segment sleeve pipe 13 at the poly-tubing string outlet at bottom 14 of horizontal segment notes, now sealed plunger 7 band dynamic seals 6 are up, and shutting circular passage 5 under the effect of injecting, polymeric liquid enters oil reservoir 15 in the injection pressure effect.
During for anti-flushing well, after the interior pressure release of tubing string (the ground well head leaves pressure release passage), in the annular space of anti-flushing well liquid between sleeve pipe 9 and location packer 10, pressurize, anti-fluid injection enters circular passage 5 from inlet opening 2-1, under the effect of pressure differential, the elastic force that sealed plunger 7 overcomes spring 8 with dynamic seal 6 is descending, expose circular passage 5, flushing fluid enters horizontal segment by this location sealing device and annotates in the annular space between poly-tubing string 12 and horizontal segment sleeve pipe 13, annotate poly-tubing string 12 from horizontal segment and enter outlet at bottom 14, realize anti-flushing well.
During for anti-the notes, not pressure release in tubing string (ground well head pressure release passage shuts), in the annular space of anti-flushing well liquid between sleeve pipe 9 and location packer 10, pressurize, anti-fluid injection enters circular passage 5 from inlet opening 2-1, under the effect of pressure differential, the power that sealed plunger 7 overcomes spring 8 with dynamic seal 6 is descending, expose circular passage 5, flushing fluid enters horizontal segment by this location sealing device and annotates in the annular space between poly-tubing string 12 and horizontal segment sleeve pipe 13, polymeric liquid enters oil reservoir 15 in the injection pressure effect, realizes instead annotating.
While being used for recovering water filling, after recovering water filling, under the acting in conjunction of tubing string injection pressure and spring 8 power, sealed plunger 8 band dynamic seals 7 reset, and seal up well-flushing circular passage 5, realize normal water filling.
Claims (1)
1. a horizontal flood well layering sealing, with the anti-sealing device of being doomed of backwash, is characterized in that this location sealing device comprises top connection, overcoat, central tube, seal, sealed plunger and spring; One end of described top connection is annotated poly-tubing string for the top that connects the horizontal flood well, and the other end of top connection is connected with central tube, and the other end of central tube is lower contact, and lower contact is annotated poly-tubing string for the bottom that connects the horizontal flood well; Described overcoat, seal, sealed plunger and spring successively from top connection to the lower contact coaxial package on central tube; Form circular passage between described overcoat and central tube, put outward and be provided with inlet opening, inlet opening is connected with circular passage, puts outward and is provided with positioning step and joint ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220630174 CN202954776U (en) | 2012-11-23 | 2012-11-23 | Locating sealing device applied to horizontal water injection well layered seal and capable of back flushing and back injecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220630174 CN202954776U (en) | 2012-11-23 | 2012-11-23 | Locating sealing device applied to horizontal water injection well layered seal and capable of back flushing and back injecting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202954776U true CN202954776U (en) | 2013-05-29 |
Family
ID=48460353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220630174 Expired - Fee Related CN202954776U (en) | 2012-11-23 | 2012-11-23 | Locating sealing device applied to horizontal water injection well layered seal and capable of back flushing and back injecting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202954776U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035338A (en) * | 2017-05-12 | 2017-08-11 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Annular space is counter notes backward extrusion blocking method for a kind of fine sand leak stopping slurry |
| CN111441751A (en) * | 2020-04-15 | 2020-07-24 | 王皓 | Coiled tubing multilayer is annotated and is gathered integrative device of well-flushing |
| CN111472759A (en) * | 2020-06-02 | 2020-07-31 | 东营市创世石油测试新技术开发有限责任公司 | High-pressure dynamic sealing device for output shaft of water injection well measuring and adjusting instrument |
-
2012
- 2012-11-23 CN CN 201220630174 patent/CN202954776U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035338A (en) * | 2017-05-12 | 2017-08-11 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Annular space is counter notes backward extrusion blocking method for a kind of fine sand leak stopping slurry |
| CN107035338B (en) * | 2017-05-12 | 2018-12-28 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Annular space is counter infuses backward extrusion blocking method for a kind of fine sand leak stopping slurry |
| CN111441751A (en) * | 2020-04-15 | 2020-07-24 | 王皓 | Coiled tubing multilayer is annotated and is gathered integrative device of well-flushing |
| CN111441751B (en) * | 2020-04-15 | 2022-01-25 | 王皓 | Coiled tubing multilayer is annotated and is gathered integrative device of well-flushing |
| CN111472759A (en) * | 2020-06-02 | 2020-07-31 | 东营市创世石油测试新技术开发有限责任公司 | High-pressure dynamic sealing device for output shaft of water injection well measuring and adjusting instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201778732U (en) | Oil pipe hanger for marine underwater upright oil production tree | |
| CN201460803U (en) | Self-expanding packer when meeting oil and water | |
| CN105114027B (en) | A kind of anti-shoulder compression packer of flexible self sealss | |
| CN110295879A (en) | A kind of staged fracturing horizontal well in segments period note adopts dual string | |
| CN202954776U (en) | Locating sealing device applied to horizontal water injection well layered seal and capable of back flushing and back injecting | |
| CN203948037U (en) | Sectional quantitative injection pipe column | |
| CN202914019U (en) | Packer seat sealing mechanism for coiled tubing | |
| CN107605443A (en) | CO (carbon monoxide)2Gas driving and injecting process pipe column structure | |
| CN104806211B (en) | One kind takes over calm the anger extracting device of oil and method | |
| CN201225114Y (en) | Downhole hydraulic self-sealing flexible plunger seal oil conduit type well head seal device | |
| CN208456570U (en) | A kind of extracting device of oil | |
| CN204371248U (en) | Anti-pollution tubular column | |
| CN202970640U (en) | Reservoir protection tubular pillar of pressure self-adaptive anchoring packer | |
| CN203742575U (en) | Dual-seal oil pumping device for steam injection and oil extraction | |
| CN202531133U (en) | Oil well seals intermediate layer and adopts two water shutoff technology tubular columns | |
| CN203347704U (en) | Well washing and oil draining device for pumping well | |
| CN201705278U (en) | Open hole self-expansion annular packer | |
| CN201137465Y (en) | Low yield well pumping unit | |
| CN110359875A (en) | Extension gas lift device and method | |
| CN204041041U (en) | Oil well liquid increasing device | |
| CN203879448U (en) | Casing protected gas injection packer for CO2 injection well | |
| CN202500536U (en) | Oil pumping pipe column and rod column with self-locking type connecting-tripping device | |
| CN202417419U (en) | Self-anchoring well-flushing packer | |
| CN202544815U (en) | Exhaust string for deep-drawing process well | |
| CN207437014U (en) | Oil production pipe |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20211123 |