CN201090177Y - Multifunctional check valve - Google Patents
Multifunctional check valve Download PDFInfo
- Publication number
- CN201090177Y CN201090177Y CNU200720028487XU CN200720028487U CN201090177Y CN 201090177 Y CN201090177 Y CN 201090177Y CN U200720028487X U CNU200720028487X U CN U200720028487XU CN 200720028487 U CN200720028487 U CN 200720028487U CN 201090177 Y CN201090177 Y CN 201090177Y
- Authority
- CN
- China
- Prior art keywords
- pipe
- outer screen
- screen pipe
- ball
- screen casing
- 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
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Abstract
Disclosed is a multi-functional check valve, which comprises an upper joint, a tripping ball cover, a steel ball, a ball seat, an outer sieve pipe, an inner sieve pipe, an anti-rotating pin, a shear pin, a limiting snap ring and a sealing member, the upper joint is connected with the outer sieve pipe, and the tripping ball cover, the ball seat, the steel ball and the inner sieve pipe are sequentially disposed in the upper joint and the inner cavity of the outer sieve pipe from above to below. The utility model has advantages of being communicated with the oil jacket, blowout prevention in the overflow well and preventing halfway seating and sealing of the packer, and can be widely applied to oil production and water flooding technique.
Description
One, technical field
The utility model relates to the oil exploitation downhole tool, particularly a kind of multi-functional single current valve.
Two, background technology
The ball-and-seat of The field mainly is made up of valve ball, valve seat at present, and in the process of going into the well, the liquid in the pit shaft directly enters oil pipe by valve seat.Use this kind ball-and-seat, have following shortcoming or deficiency: 1. for overflow well, in the process of going into the well, well liquid is from the ejection of oil pipe upper end, and the operating personnel emits the spray operation, is not easy to operation; The excessive velocities in case 2. careless manipulation, oil pipe are gone into the well enters and falls after rise rapidly after well liquid in the oil pipe rises to peak, produces hydraulic blow, causes packer to set midway and does over again, and increases cost of production, prolongs duty cycle.
Three, summary of the invention
The purpose of this utility model provides a kind of improved multi-functional single current valve, through the improvement of structure, and the shortcoming or the deficiency that overcome effectively or avoid existing in the above-mentioned prior art.
Multi-functional single current valve described in the utility model, comprise top connection, the cover of blocking, steel ball, ball seat, outer screen pipe, interior screen casing, anti-rotation pin, shear pin, spacing snap ring and seal, described top connection is connected with outer screen pipe, and top connection and outer screen pipe inner chamber are equipped with the cover of blocking, ball seat and steel ball and interior screen casing from top to bottom in turn.
Wherein, described interior screen casing, outer screen pipe are provided with corresponding flowing hole.The screen casing upper end is connected with ball seat in described, and the lower end is a blind hole, is positioned at outer screen pipe.Described outer screen pipe and interior screen casing bottom are provided with shear pin, are provided with spacing snap ring outside the interior screen casing bottom Yu in the outer screen pipe bottom.On the described ball seat seal is installed.
The utility model has following advantage compared with prior art:
1, owing to adopts interior outer screen pipe, flowing hole in when going into the well on the screen casing staggers mutually with the flowing hole on the outer screen pipe, fluid course in the closed-in well, when the seat envelope is suppressed, interior screen casing moves down, flowing hole on it is connected with the flowing hole of outer tube, effectively the well head overflow of control well liquid in the process of going into the well and normal liquid communication.
2, prevent gushing of overflow well effectively, prevent the pollution of personnel, environment.
3, prevent that effectively packer from setting midway, shorten duty cycle, reduce operating cost.
Four, description of drawings
Accompanying drawing is a kind of structural representation of the present utility model.
Five, the specific embodiment
Consult accompanying drawing, a kind of multi-functional single current valve, comprise top connection, the cover of blocking, steel ball, ball seat, outer screen pipe, interior screen casing, anti-rotation pin, shear pin, spacing snap ring and seal, top connection 1 is connected with outer screen pipe 6, and top connection and outer screen pipe inner chamber are equipped with block cover 2, ball seat 5 and steel ball 3 and interior screen casing 7 from top to bottom in turn.
Interior screen casing 7, outer screen pipe 6 are provided with corresponding flowing hole 11.Interior screen casing upper end is connected with ball seat 5, and the lower end is a blind hole, is positioned at outer screen pipe 6.Outer screen pipe and interior screen casing bottom are provided with shear pin 9, are provided with spacing snap ring 10 outside the interior screen casing bottom Yu in the outer screen pipe bottom.Seal 4 is installed on the ball seat 5.Anti-rotation pin 8 is installed on the blind hole of interior screen casing 7.
During work, be connected to the bottom of separate injection tubing string, in the process of going into the well, liquid in the pit shaft enters in the oil pipe by the gap between outer screen pipe 6 and the interior screen casing 7, because the throttling action of outer screen pipe 6 and interior screen casing 7, well liquid is to infiltrate in the oil pipe lentamente rather than directly enter in the oil pipe, thereby makes liquid level in the oil pipe be lower than the liquid level of oil jacket annular space all the time.For overflow well, just can prevent that well liquid from spraying from the oil pipe top in separate injection tubing string is gone into the well process, also can prevent to produce hydraulic blow, avoid packer to set midway, guarantee smooth completion.Go into the well put in place after, suppress set packer from oil pipe, pressure affacts shear pin 9 by steel ball 3, ball seat 5, interior screen casing 7, when reaching certain pressure, cut off shear pin 9, the stopper slot on the outer screen pipe 6 is descending together contacts with outer screen pipe 6 until ball seat 5 for steel ball 3, ball seat 5, interior screen casing 7, and outer screen pipe 6 overlaps with flowing hole 11 on the interior screen casing 7 simultaneously; Spacing snap ring 10 enters under the interior step of outer screen pipe 6 reamings part, spacing snap ring 10 has the one-way of axially-movable, and during anti-flushing well, screen casing 7 axially moves upward in the restriction, make the flowing hole that sets on back outer screen pipe 6 and the interior screen casing 7 be in coincidence status all the time, guarantee the smooth and easy connection of oil jacket.
Claims (5)
1. multi-functional single current valve, comprise top connection, the cover of blocking, steel ball, ball seat, outer screen pipe, interior screen casing, anti-rotation pin, shear pin, spacing snap ring and seal, it is characterized in that described top connection is connected with outer screen pipe, top connection and outer screen pipe inner chamber are equipped with the cover of blocking, ball seat and steel ball and interior screen casing from top to bottom in turn.
2. multi-functional single current valve according to claim 1 is characterized in that described interior screen casing, outer screen pipe are provided with corresponding flowing hole.
3. multi-functional single current valve according to claim 1 and 2 is characterized in that described interior screen casing upper end is connected with ball seat, and the lower end is a blind hole, is positioned at outer screen pipe.
4. multi-functional single current valve according to claim 1 and 2 is characterized in that described outer screen pipe and interior screen casing bottom are provided with shear pin, are provided with spacing snap ring outside the interior screen casing bottom Yu in the outer screen pipe bottom.
5. multi-functional single current valve according to claim 1 is characterized in that on the described ball seat seal being installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720028487XU CN201090177Y (en) | 2007-09-25 | 2007-09-25 | Multifunctional check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720028487XU CN201090177Y (en) | 2007-09-25 | 2007-09-25 | Multifunctional check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201090177Y true CN201090177Y (en) | 2008-07-23 |
Family
ID=39861937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720028487XU Expired - Fee Related CN201090177Y (en) | 2007-09-25 | 2007-09-25 | Multifunctional check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201090177Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943646A (en) * | 2012-12-12 | 2013-02-27 | 山东瑞丰石油技术有限责任公司 | Pressure measuring ball valve for once multiple gravel pack tool |
| CN103061683A (en) * | 2013-01-11 | 2013-04-24 | 西南石油大学 | Dual-purpose tool as drill stem and well completion sieve tube |
| CN105672953A (en) * | 2014-11-21 | 2016-06-15 | 中国石油天然气股份有限公司 | Multifunctional well-completion sieve tube tool and usage method thereof |
| CN106522881A (en) * | 2016-12-07 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Downhole isolating valve |
| CN109322639A (en) * | 2018-12-07 | 2019-02-12 | 湖南唯科拓石油科技服务有限公司 | A kind of oil/gas well screen casing shearing ball seat |
-
2007
- 2007-09-25 CN CNU200720028487XU patent/CN201090177Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943646A (en) * | 2012-12-12 | 2013-02-27 | 山东瑞丰石油技术有限责任公司 | Pressure measuring ball valve for once multiple gravel pack tool |
| CN102943646B (en) * | 2012-12-12 | 2015-09-23 | 山东瑞丰石油技术有限责任公司 | A kind of pressure measurement ball valve for single multilayer gravel pack tools |
| CN103061683A (en) * | 2013-01-11 | 2013-04-24 | 西南石油大学 | Dual-purpose tool as drill stem and well completion sieve tube |
| CN105672953A (en) * | 2014-11-21 | 2016-06-15 | 中国石油天然气股份有限公司 | Multifunctional well-completion sieve tube tool and usage method thereof |
| CN106522881A (en) * | 2016-12-07 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Downhole isolating valve |
| CN109322639A (en) * | 2018-12-07 | 2019-02-12 | 湖南唯科拓石油科技服务有限公司 | A kind of oil/gas well screen casing shearing ball seat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |