Twin seal well packer
US4657084A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Sep 17, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1295
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well packer is shown of the type having a packer head and a pair of tubular extending downwardly therefrom. An upper seal, a gripping assembly, a lower seal and a lock body are all located about the mandrels extending successively downwardly from the packer head. An actuator within the lock body is provided for effecting outward radial movement of the seals and gripping assembly to seal and grip a surrounding well conduit. A push rod extending from the lock body through the lower seal to the gripping assembly moves the gripping assembly, as a unit, in the direction of the upper seal to compress the upper seal before the lower seal is compresed. A tie rod extends from the packer head through the upper seal to the gripping assembly and carries a locking mechanism which allows unidirectional movement of the gripping assembly with respect to the upper seal whereby sealing force applied to the upper seal from the gripping assembly is locked into the upper seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.