CN203756112U - Well washing balance packer - Google Patents
Well washing balance packer Download PDFInfo
- Publication number
- CN203756112U CN203756112U CN201420015640.5U CN201420015640U CN203756112U CN 203756112 U CN203756112 U CN 203756112U CN 201420015640 U CN201420015640 U CN 201420015640U CN 203756112 U CN203756112 U CN 203756112U
- Authority
- CN
- China
- Prior art keywords
- well
- flushing
- piston
- tube
- deblocking
- 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
The utility model discloses a well washing balance packer. The well washing balance packer comprises an upper connector, an upper central pipe, a lower central pipe and a lower connector which are sequentially connected from top to bottom, wherein a well washing balance mechanism is designed outside the upper central pipe, the lower end of the well washing balance mechanism is connected with an outer central pipe sleeving the upper central pipe through an upper blocking cap, a well washing sleeve is designed on the outer side of the well washing balance mechanism, the outer central pipe is sleeved by a setting mechanism, the lower end of the setting mechanism is connected with a deblocking mechanism, a lock sleeve is designed on the outer side of the deblocking mechanism, the outer side of the lower central pipe is connected with an upper piston, and the outer side of the lower connector is connected with a lower piston. By adopting the well washing balance mechanism, the packer can bear high well washing pressure, the stress of the packer deblocking a shear pin when well washing pressure is high is reduced, and the sealing performance of the packer is improved.
Description
Technical field
The utility model relates to used for water injection wells in oil fields compression packer, specifically well-flushing balance packer.
Background technology
On the compression that separated-zone water infection oil field tubing string is conventional at present, carry deblocking packer, during anti-flushing well, well-flushing pressure-acting is in packing rubber sleeve, by sealing-locking device, be delivered to deblocking shear pin, whether make deblocking shear pin in stress, cut off after stressed, mainly the size by well-flushing pressure determines.By carrying deblocking packer in applied compression formula, in converted production well and water filling interval absorption well, find, after packer setting, sleeve pipe liquid level declines, in oil pipe, sealing liquid level is constant, injection well downhole flow regulator track is because inside and outside differential pressure cannot commutate, need to fill oil jacket annular space by anti-flushing well, oil jacket level balance just can make injection well downhole flow regulator commutation, and now owing to blocking the formation leakage of envelope section, make oil jacket annulus fluid infiltrate fast stratum, the pressure generation negative pressure that sharply declines, suck-back is closed well-flushing piston, anti-flushing well pressure is higher, cause packer to wriggle up and down, affect its sealing effectiveness, when serious, cause deblocking shear pin to cut off, a whole set of tubing string lost efficacy.
Summary of the invention
The purpose of this utility model is to provide well-flushing balance packer, and the design of well-flushing balanced controls makes packer can bear higher well-flushing pressure; Reduce stressed when well-flushing pressure is higher of removing seal for packer shear pin, improved packer sealing performance.
In order to reach above-mentioned purpose, the utility model has adopted following technical scheme, well-flushing balance packer, comprise the top connection connecting successively from top to bottom, upper center tube, lower center tube, lower contact, described upper center tube outside is designed with well-flushing balanced controls, described well-flushing balanced controls lower end connects the exterior central tube that is enclosed within equally upper center tube outside by upper gear cap, described well-flushing balanced controls outside connects well-flushing overcoat, described exterior central tube outer cover has setting mechanism, setting mechanism lower end connects separates sealing mechanism, separate sealing mechanism outside and be designed with lock tube, described lower center tube arranged outside upper piston, lower contact arranged outside has lower piston.
Described well-flushing balanced controls comprise dummy piston, packed-piston, well-flushing piston, above-mentioned three pistons are successively set in the annular space between upper center tube and well-flushing overcoat from top to bottom, the outer set upper side of described well-flushing is connected in top connection by deblocking shear pin, and lower end is connected on gear cap.
Described setting mechanism comprises at least two packing elements and separates the spacer ring between packing element, described solution sealing mechanism comprises the deblocking lock dog that is positioned at the safe lock dog of exterior central tube lower end and is positioned at safe lock dog below, described deblocking lock dog periphery is provided with retaining ring seat, and lower end position is provided with snap ring outside retaining ring seat.
Described setting mechanism is connected by lower block cap with lock tube, on lock tube sidewall, offers through hole.
Described upper piston upper end is stuck in lower center tube upper end and is connected with lock tube, and lower end is connected with lower piston, and described lower piston upper end is stuck in lower contact upper end, and lower end is connected on lower baffle ring, and lower baffle ring is connected with lower contact again.
Described lower piston connects lower baffle ring by setting shear pin, and lower baffle ring is connected with lower contact by backing-up screw.
Compared to prior art, the utlity model has following beneficial effect:
Expanded and on compression, put forward the scope of application of deblocking packer under the different well ' s conditions of oil field; The layering qualification rate that has improved dispensing well, has extended the tubing string life-span.
Accompanying drawing explanation
Fig. 1 is the structural representation of well-flushing balance packer of the present utility model.
In figure: 1-top connection; 2-deblocking shear pin; 3-dummy piston; 4-packed-piston; 5-well-flushing overcoat; 6-upper center tube; 7-well-flushing piston; 8-above keep off cap; 9-packing element; 10-spacer ring; 11-exterior central tube; 12-lower block cap; 13-safe lock dog; 14-deblocking lock dog; 15-lock tube; 16-snap ring is sat; 17-snap ring; 18-lower center tube; 19-upper piston; 20-lower piston; 21-lower contact; 22-set shear pin; 23-lower baffle ring; 24-backing-up screw.
The specific embodiment
Relevant detailed description of the present utility model and technology contents, coordinate accompanying drawing to be described as follows, yet accompanying drawing only provides the use of reference with explanation, is not used for the utility model to be limited.
As shown in Figure 1, well-flushing balance packer, in top connection 1, be connected with upper center tube 6, be connected by deblocking shear pin 2 with dummy piston 3 outward, dummy piston 3 is connected with well-flushing overcoat 5, in upper center tube 6 and well-flushing overcoat 5 annular spaces, packed-piston 4 is installed in upper end, well-flushing piston 7 is installed in lower end, well-flushing overcoat 5 is connected with upper gear cap 8, upper gear cap 8 is connected with exterior central tube 11, on exterior central tube 11 external diameters, packing element 9 is installed, spacer ring 10 and lower block cap 12, safe lock dog 13 is arranged on upper center tube 6, exterior central tube 11 and lower block cap 12 coordinate on the step surface forming, deblocking lock dog 14 is arranged on upper center tube 6, snap ring seat 16 and exterior central tube 11 coordinate on the step surface forming, lower block cap 12 is connected with lock tube 15, snap ring 17 is arranged in the fluting of snap ring seat 16, on upper piston 19, be connected with lock tube 15, be connected with lower piston 20 down, on lower center tube 18, be connected with upper center tube 6, be connected with lower contact 21 down, lower piston 20 is connected by setting shear pin 22 with lower baffle ring 23, lower baffle ring 23 is connected by backing-up screw 24 with lower contact 21.
The course of work:
Go into the well, on packer, lower contact is connected with oil pipe, and at safe lock dog and set under the effect of shear pin, packer is gone into the well in process and can not set.
Set, by oil pipe, suppress and close well-flushing passage, tubing pressure acts on two-stage piston simultaneously, when tubing pressure reaches certain value, set shear pin and cut off, on two-stage piston starts, move compression packing element and be expanded on casing wall, after having set, snap ring and lock tube locking, packing element, all the time in Expansion sealing state, can not regained.
Water filling, oil pipe comes water pressure promotion well-flushing piston to move down, and closes well-flushing passage, realizes layering.
Anti-flushing well, water enters oil jacket annular space, and pressure acts on dummy piston, well-flushing piston simultaneously and separates on packing element, and dummy piston is offset partial action downward packing element pulling force on deblocking shear pin, when thrust is greater than self cushion rubber frictional force on well-flushing piston, open well-flushing passage.
Deblocking, during lift pipe string, above carries oil pipe and drives on central tube and move, and when packer compression packing element and sleeve pipe, is close to when motionless, and upper lifting force is cut off deblocking shear pin, on central tube, move, and the release of deblocking lock dog, retaining mechanism moves down, and packing element automatic drawing back is realized deblocking.
The foregoing is only preferred embodiment of the present utility model, non-in order to limit the scope of the claims of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to the scope of the claims of the present utility model.
Claims (6)
1. well-flushing balance packer, it is characterized in that, comprise the top connection connecting successively from top to bottom, upper center tube, lower center tube, lower contact, described upper center tube outside is designed with well-flushing balanced controls, described well-flushing balanced controls lower end connects the exterior central tube that is enclosed within equally upper center tube outside by upper gear cap, described well-flushing balanced controls outside is designed with well-flushing overcoat, described exterior central tube outer cover has setting mechanism, setting mechanism lower end connects separates sealing mechanism, separate sealing mechanism outside and be designed with lock tube, described lower center tube outside connects upper piston, lower contact outside is connected with lower piston.
2. well-flushing balance packer according to claim 1, it is characterized in that, described well-flushing balanced controls comprise dummy piston, packed-piston, well-flushing piston, above-mentioned three pistons are successively set in the annular space between upper center tube and well-flushing overcoat from top to bottom, the outer set upper side of described well-flushing is connected in top connection by deblocking shear pin, and lower end is connected on gear cap.
3. well-flushing balance packer according to claim 1, it is characterized in that, described setting mechanism comprises at least two packing elements and separates the spacer ring between packing element, described solution sealing mechanism comprises the deblocking lock dog that is positioned at the safe lock dog of exterior central tube lower end and is positioned at safe lock dog below, described deblocking lock dog periphery design has retaining ring seat, and lower end position is provided with snap ring outside retaining ring seat.
4. well-flushing balance packer according to claim 1, is characterized in that, described setting mechanism is connected by lower block cap with lock tube, on lock tube sidewall, offers through hole.
5. well-flushing balance packer according to claim 1, is characterized in that, described upper piston upper end is stuck in lower center tube upper end and is connected with lock tube, lower end is connected with lower piston, described lower piston upper end is stuck in lower contact upper end, and lower end is connected on lower baffle ring, and lower baffle ring is connected with lower contact again.
6. well-flushing balance packer according to claim 5, is characterized in that, described lower piston connects lower baffle ring by setting shear pin, and lower baffle ring is connected with lower contact by backing-up screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420015640.5U CN203756112U (en) | 2014-01-11 | 2014-01-11 | Well washing balance packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420015640.5U CN203756112U (en) | 2014-01-11 | 2014-01-11 | Well washing balance packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203756112U true CN203756112U (en) | 2014-08-06 |
Family
ID=51251399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420015640.5U Expired - Fee Related CN203756112U (en) | 2014-01-11 | 2014-01-11 | Well washing balance packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203756112U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882514A (en) * | 2016-09-29 | 2018-04-06 | 中国石油化工股份有限公司 | Releasing type compensator |
| CN110259407A (en) * | 2019-07-16 | 2019-09-20 | 中国石油化工股份有限公司 | A kind of machine liquid inner-lock-type compression packer |
| CN113417595A (en) * | 2021-07-13 | 2021-09-21 | 中国石油化工股份有限公司 | Anchoring packer and using method thereof |
-
2014
- 2014-01-11 CN CN201420015640.5U patent/CN203756112U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882514A (en) * | 2016-09-29 | 2018-04-06 | 中国石油化工股份有限公司 | Releasing type compensator |
| CN107882514B (en) * | 2016-09-29 | 2024-05-24 | 中国石油化工股份有限公司 | Release type compensator |
| CN110259407A (en) * | 2019-07-16 | 2019-09-20 | 中国石油化工股份有限公司 | A kind of machine liquid inner-lock-type compression packer |
| CN110259407B (en) * | 2019-07-16 | 2021-06-15 | 中国石油化工股份有限公司 | Mechanical-hydraulic internal locking compression packer |
| CN113417595A (en) * | 2021-07-13 | 2021-09-21 | 中国石油化工股份有限公司 | Anchoring packer and using method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20180111 |