Well latch
US4164977A · kind A · utility
14Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1977 |
| Grant date | Aug 21, 1979 |
| Priority date | — |
| Expiry date | Apr 11, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1294
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Disclosed is a well latch for locking well tools in a well flow conductor. The latch housing has a pressure equalizing passage extending through its wall. A valve controls flow through the equalizing passage. Keys, carried by the latch housing, are expanded outwardly into a locking groove of a well flow conductor to lock the well latch therein. A fishing neck, associated with the latch, permits retrieval of the latch. This abstract is neither intended to define the scope of the invention, which, of course, is measured by the claims, nor is it intended to be limiting in any way.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.