CN2257567Y - Packer locking and releasing mechanism - Google Patents
Packer locking and releasing mechanism Download PDFInfo
- Publication number
- CN2257567Y CN2257567Y CN 94219914 CN94219914U CN2257567Y CN 2257567 Y CN2257567 Y CN 2257567Y CN 94219914 CN94219914 CN 94219914 CN 94219914 U CN94219914 U CN 94219914U CN 2257567 Y CN2257567 Y CN 2257567Y
- Authority
- CN
- China
- Prior art keywords
- lock
- packer
- central tube
- locking
- lock ring
- 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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- Earth Drilling (AREA)
Abstract
The utility model relates to a locking and releasing mechanism for a packer. A lock sleeve can generate relative movement with a lock ring under the action of pressure difference when a packer is locked; the lock ring can move slightly and disengage from the binding of a support lock block simultaneously; the lock ring can be locked on a special screw thread in the lock sleeve; the lock ring can move back to the position which is bound by the support lock block after pressure is released, so the locking action of the packer is completed; the support lock block can retract and lose the binding by lifting a central tube when the pressure is released; under the actions of the resilience of a rubber cylinder and the friction force of the rubber cylinder and a casing pipe wall, the lock block can be disengaged from the lock sleeve, and the release action is completed. The utility model shortens the length of the packer, and can be locked and released repeatedly; the utility model has the advantages of convenient operation and strong reliability.
Description
The utility model is a kind of packer locking and relieving mechanism that is used for oilfield downhole operation.
The domestic packer that is used for underground work at present adopts the compression Tubing Packer more, wherein a kind of locking of packer and release are realized by a minute claw mechanism, divide the axial dimension of claw mechanism long, when bearing bigger end thrust, the phenomenon that can throw off release makes it directly to influence the seat envelope of packer.
The purpose of this utility model provides a kind of locking and relieving mechanism of packer, but its emergency seat envelope not only, and can repeat repeatedly to lock and discharge, to satisfy the needs of underground work.
The purpose of this utility model is achieved in that to be carried out will locking before the underground work and relieving mechanism is installed in the packer near the packing element, in the operation, when packer need lock, fluid cylinder promotes lock tube under the effect of producing pressure differential and top glue piston compresses interior packing element, make the lock ring that is installed on the exterior central tube and support lock dog and produce relative motion, lock ring breaks away from the constraint of supporting lock dog by displacement and is locked on the screw thread in the lock tube, remove and press the back under the effect of packing element elastic force, lock ring comes back on the position of supporting the lock dog constraint, promptly finishes locking process; When packer need discharge, on carry central tube and make and support lock dog and move to the minor diameter position from the major diameter position of central tube, lock ring loses constraint, the packing element screen resilience and on when carrying packing element and the casing wall friction cause under the downward active force, spin off the screw thread of lock ring in lock tube, promptly finish dispose procedure, reached the purpose of the locking and the release of packer.
The locking of packer and the lock tube in the relieving mechanism (4) are installed in exterior central tube (2) and central tube (7) is outer and top glue piston (3) screwed connection, cover lock ring (5) simultaneously and support lock dog (6), lock ring (5) is installed in the cannelure of exterior central tube (2), supports lock dog (6) and is installed in the major diameter place that is in central tube (7) in exterior central tube (2) hole.
Below in conjunction with accompanying drawing and embodiment the utility model is further specified:
Accompanying drawing is vertical section structure figure of the present utility model.
Among the figure: 1, packing element 2, exterior central tube 3, top glue piston 4, lock tube 5, lock ring 6, support lock ring 7, central tube.
In the accompanying drawings: interior packing element (1) is installed in outside the exterior central tube (2), exterior central tube (2) is installed in outside the central tube (7), support lock dog (6) and be installed in the major diameter place that is in central tube (7) in exterior central tube (2) hole, lock ring (5) is installed in the cannelure of exterior central tube (2), top glue piston (3) is installed in outside the exterior central tube (2), lock tube (4) is installed in exterior central tube (2) and central tube (7) is outer and top glue piston (3) screwed connection, covers lock ring (5) simultaneously and supports lock dog (6).
With upper packer locking with relieving mechanism can repeatedly lock and release hockets, adopt this locking and relieving mechanism can shorten the length of packer, and have easy to use, seal advantages such as reliable.
Claims (1)
1, a kind of packer locking and relieving mechanism, mainly by interior packing element (1), exterior central tube (2), top glue piston (3), lock tube (4), lock ring (5), support lock dog (6), central tube (7) is formed, it is characterized in that: the locking of packer and relieving mechanism be placed in packing element (1) near, lock tube (4) is installed in exterior central tube (2) and central tube (7) is outer and top glue piston (3) screwed connection, cover lock ring (5) simultaneously and support lock dog (6), lock ring (5) is installed in the cannelure of exterior central tube (2), supports lock dog (6) and is installed in exterior central tube (2) hole major diameter place for central tube (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94219914 CN2257567Y (en) | 1994-08-31 | 1994-08-31 | Packer locking and releasing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94219914 CN2257567Y (en) | 1994-08-31 | 1994-08-31 | Packer locking and releasing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2257567Y true CN2257567Y (en) | 1997-07-09 |
Family
ID=33834640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94219914 Expired - Fee Related CN2257567Y (en) | 1994-08-31 | 1994-08-31 | Packer locking and releasing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2257567Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437605A (en) * | 2016-09-06 | 2017-02-22 | 中国石油化工股份有限公司 | Packer |
-
1994
- 1994-08-31 CN CN 94219914 patent/CN2257567Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437605A (en) * | 2016-09-06 | 2017-02-22 | 中国石油化工股份有限公司 | Packer |
| CN106437605B (en) * | 2016-09-06 | 2018-12-14 | 中国石油化工股份有限公司 | A kind of packer |
| CN109751011A (en) * | 2016-09-06 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of hot-washing wax remover packer |
| CN109751009A (en) * | 2016-09-06 | 2019-05-14 | 中国石油化工股份有限公司 | One kind can hot-washing wax remover packer repeatedly |
| CN109751009B (en) * | 2016-09-06 | 2021-02-12 | 中国石油化工股份有限公司 | Repeated hot-washing paraffin removal packer |
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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 |