CN204299542U - A kind of hydrostatic closedown sliding sleeve switch - Google Patents
A kind of hydrostatic closedown sliding sleeve switch Download PDFInfo
- Publication number
- CN204299542U CN204299542U CN201420694287.8U CN201420694287U CN204299542U CN 204299542 U CN204299542 U CN 204299542U CN 201420694287 U CN201420694287 U CN 201420694287U CN 204299542 U CN204299542 U CN 204299542U
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- CN
- China
- Prior art keywords
- sliding sleeve
- overcoat
- hole
- hydrostatic
- central
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a kind of hydrostatic closedown sliding sleeve switch, be made up of top connection, sliding sleeve, overcoat, lower contact, top connection, overcoat, lower contact are threaded successively, and the central through hole of overcoat is stepped, its upper inner diameter is less than lower inner diameter, and tube wall is provided with fluid hole in the middle; Sliding sleeve is arranged in overcoat, is tubular structure, and the upper end of its central through hole is conical surface ball seat, and lower end is provided with outer shoulder, and its outer shoulder is in overcoat between shoulder and lower contact central through hole upper interior end face.The beneficial effects of the utility model are, air in hydrostatic effect compression seal cavity, makes sliding sleeve switch automatically close, can not the water filling of lift pipe string direct layering or oil production by layer after separate stratum fracfturing, acidizing treatment, simplify flow chart, reduce operating cost and construction period.
Description
Technical field
The utility model relates to a kind of hydrostatic closedown sliding sleeve switch, belongs to petroleum production engineering downhole tool field.
Background technology
Sliding sleeve switch is one of downhole tool important in oil, gas, well separate stratum fracfturing, acidizing treatment operation, conventional sliding sleeve switch is made up of overcoat, sliding sleeve, shear pin, when separate stratum fracfturing, acidizing treatment, suppressed by oil pipe and cut off shear pin, sliding sleeve is descending, and after construction, sliding sleeve can not reset, and tubing string and oil jacket annular space are in connected state all the time, after need tripping out tubing string, lower tubular column carries out seperated layer water injection or oil production by layer, long construction period again.
Utility model content
The purpose of this utility model overcomes after sliding sleeve switch is opened to reset, and the defect that between tubing string and oil jacket annular space, passage can not be closed, provides a kind of sliding sleeve switch of hydrostatic closedown.
For achieving the above object, the utility model adopts technical scheme as follows:
A kind of hydrostatic closedown sliding sleeve switch, be made up of top connection, sliding sleeve, overcoat, lower contact, top connection, overcoat, lower contact are threaded successively, and the central through hole of overcoat is stepped, its upper inner diameter is less than lower inner diameter, and tube wall is provided with fluid hole in the middle; Sliding sleeve is arranged in overcoat, is tubular structure, and the upper end of its central through hole is conical surface ball seat, and lower end is provided with outer shoulder, and its outer shoulder is in overcoat between shoulder and lower contact central through hole upper interior end face.
The beneficial effects of the utility model are, can automatically close at hydrostatic effect low sleeve switch, can not the water filling of lift pipe string direct layering or oil production by layer after separate stratum fracfturing, acidizing treatment, simplify flow chart, reduce operating cost and construction period.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
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 is made up of top connection 1, sliding sleeve 4, overcoat 6, lower contact 10, and top connection 1, overcoat 6, lower contact 10 are threaded successively, and the central through hole of overcoat 6 is stepped, its upper inner diameter is less than lower inner diameter, and tube wall is provided with fluid hole 5 in the middle; Sliding sleeve 4 is arranged in overcoat 6, is tubular structure, and the upper end of its central through hole is conical surface ball seat 2, and lower end is provided with outer shoulder, and its outer shoulder is in overcoat 6 between shoulder and lower contact 10 central through hole upper interior end face.
Be provided with sealing ring 3,6 between the inner tubal wall of liquid outlet groove 5 upper/lower terminal in the middle part of overcoat 6 on tube wall and sliding sleeve 4 faying face, between the inner tubal wall of overcoat 6 lower end and sliding sleeve 4 lower end outer tube wall faying face, sealing ring 9 be installed.
Top connection 1 top is provided with female adapter, and lower end is provided with external screw thread, is threaded with overcoat 6, and lower end diameter of bore is less than sliding sleeve 4 upper end external diameter.
The utility model is connected on tubing string, under enter projected depth, seal chamber 8 is formed between the outer shoulder outer tube wall of shoulder, inner tubal wall and sliding sleeve 4 in overcoat 6, the air identical with atmospheric pressure is sealed with in seal chamber 8, because sliding sleeve 4 lower surface area is greater than upper surface area, under liquid column hydrostatic pressure effect, sliding sleeve 4 is subject to lifting force, withstand on top connection 1 lower surface, the utility model is in closed condition; When needing to open, well head drops into salvagable steel ball, drop on the valve seat 2 of sliding sleeve 4 upper end, it is descending that promotion sliding sleeve 4 suppressed by oil pipe, seal chamber 8 volume becomes large, oil pipe is communicated with sleeve pipe, the utility model is in opening, liquid enters annular space between sleeve pipe and oil pipe from oil pipe through liquid outlet groove 5, constructs complete, tubing pressure venting, the power acting on sliding sleeve 4 lower surface at liquid column hydrostatic pressure is greater than the power of upper surface, seal chamber 8 volume diminishes, and the liquid outlet groove 5 on the up overcoat 6 of large sliding sleeve 4 is closed, and the utility model recovers closed condition.
Claims (3)
1. a hydrostatic closedown sliding sleeve switch, by top connection (1), sliding sleeve (4), overcoat (6), lower contact (10) forms, it is characterized in that: top connection (1), overcoat (6), lower contact (10) is threaded successively, the central through hole of overcoat (6) is stepped, its upper inner diameter is less than lower inner diameter, tube wall is provided with fluid hole (5) in the middle, sliding sleeve (4) is arranged in overcoat (6), for tubular structure, the upper end of its central through hole is conical surface ball seat (2), lower end is provided with outer shoulder, its outer shoulder is positioned between overcoat (6) shoulder and lower contact (10) central through hole upper interior end face.
2. hydrostatic closedown sliding sleeve switch according to claim 1, it is characterized in that: be provided with sealing ring (3,6) between the inner tubal wall of liquid outlet groove (5) upper/lower terminal on the tube wall of overcoat (6) middle part and sliding sleeve (4) faying face, between the inner tubal wall of overcoat (6) lower end and sliding sleeve (4) lower end outer tube wall faying face, sealing ring (9) be installed.
3. hydrostatic closedown sliding sleeve switch according to claim 1 and 2, is characterized in that: top connection (1) top is provided with female adapter, and lower end is provided with external screw thread, is threaded with overcoat (6), lower end diameter of bore is less than sliding sleeve (4) upper end external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420694287.8U CN204299542U (en) | 2014-11-18 | 2014-11-18 | A kind of hydrostatic closedown sliding sleeve switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420694287.8U CN204299542U (en) | 2014-11-18 | 2014-11-18 | A kind of hydrostatic closedown sliding sleeve switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204299542U true CN204299542U (en) | 2015-04-29 |
Family
ID=53105088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420694287.8U Expired - Fee Related CN204299542U (en) | 2014-11-18 | 2014-11-18 | A kind of hydrostatic closedown sliding sleeve switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204299542U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909218A (en) * | 2016-05-31 | 2016-08-31 | 托普威尔石油技术股份公司 | Underground controllable spray gun |
-
2014
- 2014-11-18 CN CN201420694287.8U patent/CN204299542U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909218A (en) * | 2016-05-31 | 2016-08-31 | 托普威尔石油技术股份公司 | Underground controllable spray gun |
| CN105909218B (en) * | 2016-05-31 | 2018-11-30 | 托普威尔石油技术股份公司 | A kind of controllable spray gun in 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: 20150429 Termination date: 20191118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |