CN205078216U - Water injection packer - Google Patents
Water injection packer Download PDFInfo
- Publication number
- CN205078216U CN205078216U CN201520689645.0U CN201520689645U CN205078216U CN 205078216 U CN205078216 U CN 205078216U CN 201520689645 U CN201520689645 U CN 201520689645U CN 205078216 U CN205078216 U CN 205078216U
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- China
- Prior art keywords
- well
- flushing
- water injection
- top connection
- piston
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Abstract
The utility model relates to a downhole tool that oil field oil recovery engineering was used, especially a water injection packer. The utility model discloses by the top connection, well -flushing mechanism, inner center pipe, the packing element, outer center tube, sit and seal and the locking mechanism constitution, the well -flushing piston of well -flushing mechanism is the echelonment body, its upper portion diameter is greater than the lower part diameter, its upper end is arranged in the annular space between top connection and the well -flushing cover, the lower extreme is arranged in the annular space between compression ring and the inner center pipe, its necking down section is equipped with the conical surface, well -flushing piston upper end hole internal diameter is greater than its lower extreme off -plate footpath, be equipped with the sealing ring between the conical surface of compression ring and well -flushing piston necking down section. The beneficial effects are that, packer lower part pressure was greater than thrust to the lower thrust that the well -flushing piston produced when the water injection well stopped annotating, and it is the next to make the well -flushing piston be in, and annular space between compression ring and the well -flushing piston is at the closed condition, packer seal failure problem when having solved the water injection well and stopping annotating.
Description
Technical field
The utility model relates to the downhole tool that oil extraction in oil field engineering uses, especially a kind of injection packer capable of being used for washing well.
Background technology
The water injection packer used at present is made up of top connection, inner central tube, well-flushing mechanism, exterior central tube, packing element, setting mechanism and retaining mechanism, wherein well-flushing mechanism is made up of top connection, well-flushing cover, well-flushing piston, inner central tube and exterior central tube, well-flushing piston inner hole generally in cylindrical hole, is provided with sealing ring seal well washing passage between lower end external cylindrical surface and compression ring inner cylinder face.Multi-stage separate water injection well, because each formation pressure is different, packer bottom oil jacket annulus fluid pressure is there will be higher than inner central tube pressure when water injection well stops note, differential pressure action is in well-flushing piston lower surface, produce thrust upwards, promote well-flushing piston stroking upward, open well-flushing passage, packer sealing lost efficacy.
Utility model content
The purpose of this utility model is to provide the reliable injection packer capable of being used for washing well of a kind of sealing, effectively can solve the defect that when water injection well stops noting, packer sealing lost efficacy.
The technical scheme that the utility model adopts is: the utility model by top connection, well-flushing mechanism, inner central tube, packing element, exterior central tube, to set and retaining mechanism forms, it is boss in the middle part of top connection, in the necking segment of its underpart, be provided with pressure transmission hole, top connection centre bore lower end is threaded inner central tube; The well-flushing cover of well-flushing mechanism is tubular structure, and its upper/lower terminal is threaded with the compression ring of boss, well-flushing mechanism in the middle part of top connection respectively, and the tube wall of compression ring top well-flushing cover is provided with well-flushing mouth; The well-flushing piston of well-flushing mechanism is stepped body, its upper diameter is greater than lower diameter, its upper end be placed in top connection and well-flushing overlap between annular space in, lower end is placed in the annular space between compression ring and inner central tube, its necking segment is provided with the conical surface, well-flushing piston upper end bore inner diameter is greater than lower surface external diameter, between compression ring and the conical surface of well-flushing piston necking segment, be provided with joint ring.
Described joint ring is section is trapezoidal annulus.
Annular ring is separately installed with between the described inside and outside tube wall of well-flushing piston and top connection, well-flushing cover, compression ring.
Described to set and the tube wall on retaining mechanism top is provided with lower well-flushing mouth.
The beneficial effects of the utility model are, when water injection well stops noting, packer low pressure is greater than lifting force to the lower thrust that well-flushing piston produces, make well-flushing piston be in bottom, the annular space between compression ring and well-flushing piston is in closed condition, solves packer sealing Problem of Failure when water injection well stops noting.
Accompanying drawing explanation
Fig. 1 is the utility model general structure half section schematic diagram.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further illustrated.
With reference to accompanying drawing 1, the utility model by top connection 1, well-flushing mechanism 2, inner central tube 3, packing element 4, exterior central tube 5, to set and retaining mechanism 7 forms, be boss in the middle part of top connection 1, be provided with pressure transmission hole 2b in the necking segment of its underpart, top connection 1 centre bore lower end is threaded inner central tube 3; The well-flushing cover 2c of well-flushing mechanism 2 is tubular structure, and its upper/lower terminal is threaded with the compression ring 2j of boss, well-flushing mechanism 2 in the middle part of top connection 1 respectively, and the tube wall of the well-flushing cover 2c on compression ring 2j top is provided with well-flushing mouth 2g; The well-flushing piston 2e of well-flushing mechanism 2 is stepped body, its upper diameter is greater than lower diameter, its upper end is placed in top connection 1 and well-flushing overlaps in the annular space between 2c, lower end is placed in the annular space between compression ring 2j and inner central tube 3, its necking segment is provided with the conical surface, well-flushing piston 2e upper end bore inner diameter is greater than its lower surface external diameter, between compression ring 2j and the conical surface of well-flushing piston 2e necking segment, be provided with joint ring 2h.
Described joint ring 2h is section is trapezoidal annulus.
The described inside and outside tube wall of well-flushing piston 2e and top connection 1, well-flushing overlap between 2c, compression ring 2j and are separately installed with annular ring 2d, 2f, 2i.
Described to set and the tube wall on retaining mechanism 7 top is provided with lower well-flushing mouth 6.
The utility model with running string down to projected depth, inject liquid from well head to running string to suppress, set and the up compression of retaining mechanism 7 lock packing element 4, set packer, during water injection well water filling, in tubing string, the pressure transmission hole 2b of liquid water injection pressure in top connection 1 enters and overlaps by top connection 1, well-flushing the cavity that 2c and well-flushing piston 2e forms, and promotes well-flushing piston 2e descending, annular space between closes compression ring 2j and well-flushing piston 2e, seal well washing passage.
When water injection well stops note, packer bottom oil jacket annulus fluid pressure, from the lower well-flushing mouth 6 set and the tube wall of retaining mechanism 7 top, annular space between inner central tube 3 and exterior central tube 5, it is inner that annular space between well-flushing piston 2e lower end and inner central tube 3 enters well-flushing piston 2e, because the endoporus shoulder annulus area of piston 2e upper end is slightly larger than its lower surface annulus area, therefore packer bottom oil jacket annulus fluid pressure is greater than lifting force to the lower thrust that well-flushing piston 2e produces, well-flushing piston 2e is made to be in bottom, annular space between compression ring 2j and well-flushing piston 2e is in closed condition, solve packer sealing Problem of Failure when water injection well stops noting.
Claims (4)
1. a water injection packer, by top connection (1), well-flushing mechanism (2), inner central tube (3), packing element (4), exterior central tube (5), to set and retaining mechanism (7) forms, it is characterized in that: top connection (1) middle part is boss, be provided with pressure transmission hole (2b) in the necking segment of its underpart, top connection (1) centre bore lower end is threaded inner central tube (3); The well-flushing cover (2c) of well-flushing mechanism (2) is tubular structure, its upper/lower terminal is threaded with the compression ring (2j) of top connection (1) middle part boss, well-flushing mechanism (2) respectively, and the tube wall of the well-flushing cover (2c) on compression ring (2j) top is provided with upper well-flushing mouth (2g); The well-flushing piston (2e) of well-flushing mechanism (2) is stepped body, its upper diameter is greater than lower diameter, its upper end is placed in the annular space between top connection (1) and well-flushing cover (2c), lower end is placed in the annular space between compression ring (2j) and inner central tube (3), its necking segment is provided with the conical surface, well-flushing piston (2e) upper end bore inner diameter is greater than its lower surface external diameter, is provided with joint ring (2h) between compression ring (2j) and the conical surface of well-flushing piston (2e) necking segment.
2. a kind of water injection packer according to claim 1, is characterized in that: described joint ring (2h) for section be trapezoidal annulus.
3. a kind of water injection packer according to claim 1, is characterized in that: be separately installed with annular ring (2d, 2f, 2i) between well-flushing piston (2e) inside and outside tube wall and top connection (1), well-flushing cover (2c), compression ring (2j).
4. a kind of water injection packer according to claim 1, is characterized in that: set and the tube wall on retaining mechanism (7) top is provided with lower well-flushing mouth (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520689645.0U CN205078216U (en) | 2015-09-08 | 2015-09-08 | Water injection packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520689645.0U CN205078216U (en) | 2015-09-08 | 2015-09-08 | Water injection packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205078216U true CN205078216U (en) | 2016-03-09 |
Family
ID=55430630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520689645.0U Active CN205078216U (en) | 2015-09-08 | 2015-09-08 | Water injection packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205078216U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882111A (en) * | 2019-04-11 | 2019-06-14 | 天津市益彰石油科技发展有限公司 | The logical profit wedge-type sealer of anti-sticking anticreep |
-
2015
- 2015-09-08 CN CN201520689645.0U patent/CN205078216U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882111A (en) * | 2019-04-11 | 2019-06-14 | 天津市益彰石油科技发展有限公司 | The logical profit wedge-type sealer of anti-sticking anticreep |
| CN109882111B (en) * | 2019-04-11 | 2024-04-12 | 天津市益彰石油科技发展有限公司 | Anti-blocking anti-falling through lubrication wedge type sealer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |