CN2621216Y - Controllable differential-pressure well flushing packer - Google Patents
Controllable differential-pressure well flushing packer Download PDFInfo
- Publication number
- CN2621216Y CN2621216Y CN 03250931 CN03250931U CN2621216Y CN 2621216 Y CN2621216 Y CN 2621216Y CN 03250931 CN03250931 CN 03250931 CN 03250931 U CN03250931 U CN 03250931U CN 2621216 Y CN2621216 Y CN 2621216Y
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- CN
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- Prior art keywords
- piston
- packer
- main valve
- valve body
- adapter sleeve
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- Expired - Fee Related
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Abstract
A controllable pressure difference well washing packer mainly solves the problems of the prior packer of a small testing passage and an incomplete recovery of a packer rubber. The packer is characterized in that an outer surface of an upper joint (1) shows a step form; a protruding type main valve (4) is clipped between a piston sleeve (3), which is positioned outside the upper joint (1), and a connecting sleeve (10); a piston (2) is positioned between an outer wall of an inner hole, which is under the step of the upper joint (1), the piston sleeve (3), and the main valve (4); a valve seat (6), a steel ball (7), a spring (8) and a bracket (9) are mounted in turn between a lower central pipe (11) of the main valve (4) and the connecting sleeve (10); and both ends of a jib (5), which passes through the main valve (4), are respectively contacted with the piston (2) and the valve seat (6). The packer has the characteristics of a large testing passage and a completer recovery of the packer rubber, which reduces the production cost.
Description
Technical field:
The utility model relates to used downhole tool in the petroleum production engineering field, oil field, belongs to a kind of controlled differential flushing packer.
Background technology:
During the oil field oil recovery technique is produced, producing well will satisfy the needs that recover the oil by seperated layer water injection mostly, and being provided with packer at interlayer mostly, water injection well carries out well-flushing, water filling, utilize packer that multiple zone is divided into some intervals, make it when adding persistent erection, low-permeability oil-bearing stratum flooding,, reduce difference between reservoir pre ssure and injection pressure by adjusting the restriction loss of downhole choke, the high permeability oil reservoir is controlled water filling, regulate the difference of different permeability oil reservoir water absorptions with this.And the packer central tube latus rectum that uses at present is little, be unfavorable for passing through of tester, occur the blocked portion phenomenon at tester easily during by the central tube latus rectum, the well-flushing parts adopt the connection control mode more, thorough retraction problems and influence well washing effect during differential packing element well-flushing.
The utility model content:
Existing packer test channel is little in order to overcome, packing element restores halfway deficiency, and the utility model provides a kind of controlled differential flushing packer, and this packer test channel is big, and packing element restores thoroughly, is convenient to passing through smoothly of tester, and well washing effect is good.
The technical scheme that the utility model adopted is: a kind of washing well packer, by last lower contact, piston, piston bush, adapter sleeve, packing element and central tube are formed, the adapter sleeve that is equipped with piston bush between the last lower contact and is separated by by packing element, the top connection external surface is the stage shape, place between outer piston bush of top connection and the adapter sleeve and be equipped with main valve body, be equipped with piston between endoporus outer wall under the top connection stage and piston bush and the main valve body, be equipped with valve seat between main valve body lower center tube and the adapter sleeve successively, steel ball, spring and support pass the tappet two ends of main valve body and touch mutually with piston and valve seat respectively.
The beneficial effects of the utility model are: this packer is owing to adopted the split type control structure of piston, tappet and one way valve, packing element restores thoroughly during well-flushing, help carrying out smoothly of well-flushing work, well washing effect is good, is convenient to dismounting and reparation, can also recycle for the parts that have, this packer latus rectum is big simultaneously, is convenient to tester and passes through, and avoids measuring instrument to survey by test channel a card phenomenon takes place, have that test channel is big, packing element restores characteristics completely, reduced cost of production.
Description of drawings:
Fig. 1 is the utility model structure sectional view.
1-top connection among the figure, 2-piston, 3-piston bush, 4-main valve body, 5-tappet, 6-valve seat, 7-steel ball, 8-spring, 9-support, 10-adapter sleeve, 11-central tube, 12-packing element, 13-adapter sleeve, 14-lower contact.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in FIG., a kind of controlled differential flushing packer, comprise lower contact (1,14), piston 2, piston bush 3, adapter sleeve (10,13), packing element 12 and central tube 11, last lower contact (1,14) adapter sleeve (10 that is equipped with piston bush 3 between and is separated by by packing element 12,13), top connection 1 external surface is the stage shape, place that clamping has convex main valve body 4 between outer piston bush 3 of top connection 1 and the adapter sleeve 10, be equipped with piston 2 between endoporus outer wall under top connection 1 stage and piston bush 3 and the main valve body 4, top connection 1, piston bush 3 and valve seat 4 constitute enclosed cavity, guarantee operating pressure at this intracavity liquid, piston 2 parts that push the work forward are worked together, stage can limit the movement position of piston 2, be equipped with valve seat 6 successively between main valve body 4 lower center tubes 11 and the adapter sleeve 10, steel ball 7, spring 8 and support 9, passing tappet 5 two ends of main valve body 4 touches mutually with piston 2 and valve seat 6 respectively, drive the parts touch the mutually with it process of under action of pressure, finishing the work together under the motion of piston 2, guaranteeing the flow and the flow velocity of anti-flushing well liquid 2 bodies; Top connection 1 is big with the test channel that central tube 11 is constituted, and can pass through tester smoothly, a card phenomenon can not occur.
In actual use, injection water upwards enters in the chamber of piston 2, piston bush 3, top connection 1 and main valve body 4 formations from the interior aperture water injection hole part of top connection 1, guarantee the effective travel of when anti-flushing well, working of piston 2, another part overcomes the elastic force of spring 8 downwards, promoting steel ball 7 under action of pressure lifts off a seat and 6 opens waterflood path, inject water and be injected into waterflood path with packing element 12 spreadings through water injection hole, when injection water reaches certain pressure, the effect of spring 8 in addition, make steel ball 7 and valve seat 6 be in closed state, realize the packing effect; When needing anti-flushing well, water enters piston 2 upper ends from the backwash hole, promoting piston 2 moves downward, piston 2 promotes tappet 5 makes valve seat 6 leave main valve body 4, water in the waterflood path is through the waterflood path release at this moment, and packing element 12 restores, and the well-flushing passage is opened, can guarantee the fluid flow and the flow velocity of anti-flushing well, finish the anti-flushing well process.
Use this packer can guarantee that packing element 12 restores thoroughly, well washing effect is good; The test latus rectum is big, and the card phenomenon when having avoided test is rational in infrastructure, dismantles easy to maintenancely, and the also recyclable utilization of the parts that have reached the purpose that reduces production costs.
Claims (1)
1, a kind of controlled differential flushing packer, comprise lower contact (1,14), piston (2), piston bush (3), adapter sleeve (10,13), packing element (12) and central tube (11), last lower contact (1,14) adapter sleeve (10 that is equipped with piston bush (3) between and is separated by by packing element (12), 13), it is characterized in that: top connection (1) external surface is the stage shape, place that clamping has convex main valve body (4) between outer piston bush (3) of top connection (1) and the adapter sleeve (10), be equipped with piston (2) between endoporus outer wall under top connection (1) stage and piston bush (3) and the main valve body (4), be equipped with valve seat (6) successively between main valve body (4) lower center tube (11) and the adapter sleeve (10), steel ball (7), spring (8) and support (9) pass tappet (5) two ends of main valve body (4) and touch mutually with piston (2) and valve seat (6) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03250931 CN2621216Y (en) | 2003-04-29 | 2003-04-29 | Controllable differential-pressure well flushing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03250931 CN2621216Y (en) | 2003-04-29 | 2003-04-29 | Controllable differential-pressure well flushing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2621216Y true CN2621216Y (en) | 2004-06-23 |
Family
ID=34252948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03250931 Expired - Fee Related CN2621216Y (en) | 2003-04-29 | 2003-04-29 | Controllable differential-pressure well flushing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2621216Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536155A (en) * | 2012-01-06 | 2012-07-04 | 中国石油天然气股份有限公司 | Long rubber sleeve high-pressure water injection packer |
| CN111535775A (en) * | 2020-05-21 | 2020-08-14 | 济南鸿泰华丰机械有限公司 | Adjustable constant pressure washable well packer |
| CN115506748A (en) * | 2022-09-26 | 2022-12-23 | 中海石油(中国)有限公司 | Packer setting energy storage device and using method thereof |
-
2003
- 2003-04-29 CN CN 03250931 patent/CN2621216Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536155A (en) * | 2012-01-06 | 2012-07-04 | 中国石油天然气股份有限公司 | Long rubber sleeve high-pressure water injection packer |
| CN111535775A (en) * | 2020-05-21 | 2020-08-14 | 济南鸿泰华丰机械有限公司 | Adjustable constant pressure washable well packer |
| CN111535775B (en) * | 2020-05-21 | 2022-08-30 | 东营市华科石油科技开发有限责任公司 | Adjustable constant pressure washable well packer |
| CN115506748A (en) * | 2022-09-26 | 2022-12-23 | 中海石油(中国)有限公司 | Packer setting energy storage device and using method thereof |
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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 |