Packer locking apparatus
US4989672A · kind A · utility
8Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1990 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Feb 5, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1291
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for locking a packer against premature actuation in a well bore. The locking apparatus includes a sleeve attached to a lower end of the packer and spring biased locking members adjacent to the sleeve. When in a locked position, lugs on the locking members engage a groove in the sleeve and prevent longitudinal movement of a mandrel in the packer with respect to the packer elements. When the locking apparatus enters a liner in the well bore, the locking members are biased radially inwardly, disengaging the lugs from the groove, so that the packer mandrel may be actuated and the packer set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.