Well packer with releasable head and method of releasing
US4688641A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1986 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Jul 25, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1295
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well packer adapted to be set in a well conduit and includes a mandrel, a packing seal surrounding the mandrel and slips positioned above the packing seal against an abutment. The abutment is connected to a latching head and to the mandrel. A connection is positioned adjacent the lower end of the latching head which can be broken for releasing the latching head and preferably the abutment from the mandrel for allowing the milling out of the packer without the necessity of milling the latching head. The packer is released by an upward jar on the latching head for retrieving the latching head in some embodiments and by chemical cutting in another embodiment. The packer slips are then milled out for releasing the packer for upward movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.