CN2546623Y - Pressure limiting device for packing in the borehole - Google Patents
Pressure limiting device for packing in the borehole Download PDFInfo
- Publication number
- CN2546623Y CN2546623Y CN 02235422 CN02235422U CN2546623Y CN 2546623 Y CN2546623 Y CN 2546623Y CN 02235422 CN02235422 CN 02235422 CN 02235422 U CN02235422 U CN 02235422U CN 2546623 Y CN2546623 Y CN 2546623Y
- Authority
- CN
- China
- Prior art keywords
- utility
- model
- releasing
- lower contact
- sliding sleeve
- 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 - Lifetime
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Abstract
The utility model relates to a pressure limited releasing device which is applied in the water shut-off field of oil wells and is connected with the releasing pipe of water shut-off in oil wells. The utility model comprises an upper connecting head 1, a spring pawl 2, a body 3, a pin 4, a slide sleeve 5 and a lower connecting head 8. The utility model aims to overcome the disadvantage that the releasing method in prior art that a ball is delivered or a rod is impacted to finish the releasing and the operational time is prolonged. The utility model processes releasing through the hydraulic pressure and the releasing working procedure is simplified and the operational time is reduced. The utility model has a function of setting and pressure limitation which has the effect of protecting the rubber cylinder of the packer. The utility model has simple structure, low cost and is easy to machine.
Description
One, technical field
The utility model relates to a kind of device of giving up, and belongs to the oil field machinery oil field.
Two, background technology
In oil well is given up water plugging string,, need back-off sub or the device of giving up for the shutoff tubing string is lost into the oil well plugging section.
The currently used back-off sub or the device of giving up, no matter be that ball-throwing type is given up, still throwing the bump rod-type gives up, all need from oil pipe, to drop into steel ball or trip rod and carry out water-blocking operation to realize giving up moving, but owing to have greasy dirt or dead oil to stop up tubing string in the oil pipe, cause the missile whereabouts to be obstructed easily and maybe can not drop to predetermined well section, thereby can't realize the shutoff operation of oil well.
Adopt the existing back-off sub or the device of giving up, must throw in steel ball or trip rod specially, many one flow charts, prolonged the activity duration, and the pressure limiting function when not having to packer setting, when the packer setting hypertonia occurring, easily packing element is caused damage, influence plugging effect.
Three, summary of the invention
The purpose of this utility model is exactly to provide a kind of missile that both need not in order to overcome above deficiency, has the limited pressure that sets the pressure limiting function device of giving up again.
Realize that the technical scheme that the utility model purpose is taked is: it mainly is made up of top connection, spring detent, main body, sliding sleeve and lower contact etc.Main body lower end and lower contact are by screwed connection, the top connection endoporus is inserted in the upper end, top connection and spring detent upper end are by screwed connection, spring detent claw inner conical surface step is carried and is hung main body male cone (strobilus masculinus) step, sliding sleeve is through in the lower contact, and its upper end is implemented spacing to the spring detent claw, makes the carry extension state of spring detent maintenance to main body, in lower contact, sidewall has 1 through hole to sliding sleeve at least at the lower contact middle part by dowel fixes.Sliding sleeve lower end inwall has 1 reducing step, and the lower contact outer wall is provided with corresponding with it reducing step, and face forms an annular hydraulic cavities thus.
Adopt the technical solution of the utility model can obtain following effect:
Need not missile when 1, giving up operation, simple to operate, simplified operation procedure, reduced the activity duration.
2, limited compression functions has been eliminated well fluid level design has been set the influence of pressure, efficiently solves the problem of hypertonia to the packing element infringement that set.
3, simple in structure, handling ease, cost is lower.
Four, description of drawings
Fig. 1 is a structural representation of the present utility model.
Five, specific embodiment
With reference to accompanying drawing, the utility model joins by top connection 1 and the down-hole water plugging string of giving up, under the tubing string behind design attitude, when setting, squeeze into liquid from well head, fluid pressure enters by the reducing step 7 on the sliding sleeve 5 by the through hole 9 in down-hole string and the lower contact 6, the annular hydraulic cavities 10 that corresponding with it reducing step 6 forms in the lower contact 8, and act on the sliding sleeve 5.When pressure is elevated to packer design and sets pressure (packer was finished and set action this moment), under the effect of pressure reduction, pin 4 is cut off, fluid power falls sliding sleeve 5, and spring detent 2 claws lose the spacing of sliding sleeve 5, and the through hole 9 in the lower contact 6 communicates with the sleeve pipe annular space, pressure reduces to zero, upper lifting pipe post then, spring detent 2 is thrown off from main body 3 male cone (strobilus masculinus) steps, implements to give up action.
Claims (3)
1, the limited pressure device of giving up mainly is made up of top connection (1), spring detent (2), main body (3), sliding sleeve (5) and lower contact (8) etc., it is characterized in that:
A. top connection (1) and spring detent (2) are by screwed connection, and spring detent (2) claw inner conical surface step is carried and being hung on main body (3) the male cone (strobilus masculinus) step;
B. sliding sleeve (5) is enclosed within spring detent (2) and the lower contact (8), and sliding sleeve (5) is fixed in the lower contact (6) by pin (4).
2, the limited pressure according to claim 1 device of giving up is characterized in that: lower contact (8) middle part sidewall has 1 through hole (9) at least.
3, the limited pressure according to claim 1 and 2 device of giving up, it is characterized in that: sliding sleeve (5) lower end inwall has 1 reducing step (7), and lower contact (8) outer wall is provided with corresponding with it reducing step (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02235422 CN2546623Y (en) | 2002-05-10 | 2002-05-10 | Pressure limiting device for packing in the borehole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02235422 CN2546623Y (en) | 2002-05-10 | 2002-05-10 | Pressure limiting device for packing in the borehole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2546623Y true CN2546623Y (en) | 2003-04-23 |
Family
ID=33709938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02235422 Expired - Lifetime CN2546623Y (en) | 2002-05-10 | 2002-05-10 | Pressure limiting device for packing in the borehole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2546623Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881143A (en) * | 2010-07-02 | 2010-11-10 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Drillable ball injection sliding sleeve suitable for horizontal well |
| CN102345452A (en) * | 2010-08-05 | 2012-02-08 | 新疆华油油气工程有限公司 | Self-formed ball seat sliding sleeve |
| CN105422031A (en) * | 2015-12-18 | 2016-03-23 | 贵州高峰石油机械股份有限公司 | Method and device for improving hydraulic releasing working reliability |
-
2002
- 2002-05-10 CN CN 02235422 patent/CN2546623Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881143A (en) * | 2010-07-02 | 2010-11-10 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Drillable ball injection sliding sleeve suitable for horizontal well |
| CN101881143B (en) * | 2010-07-02 | 2013-04-24 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Drillable ball injection sliding sleeve suitable for horizontal well |
| CN102345452A (en) * | 2010-08-05 | 2012-02-08 | 新疆华油油气工程有限公司 | Self-formed ball seat sliding sleeve |
| CN102345452B (en) * | 2010-08-05 | 2014-09-17 | 新疆华油油气工程有限公司 | Self-formed ball seat sliding sleeve |
| CN105422031A (en) * | 2015-12-18 | 2016-03-23 | 贵州高峰石油机械股份有限公司 | Method and device for improving hydraulic releasing working reliability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120510 Granted publication date: 20030423 |