Downhole tool and method
US10329877B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2013 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Aug 28, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/066
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole tool includes a body, a mandrel slidably disposed in the body, a piston for moving the mandrel relative to the body, and a lock having a first configuration which permits movement of the mandrel by the piston and a second configuration which provides a fluid lock across the mandrel which prevents movement of the mandrel by the piston. The lock includes first and second fluid chambers filled with a substantially incompressible fluid and a control valve configurable between an open configuration and a closed configuration, the control valve in the closed configuration providing the fluid lock preventing movement of the mandrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.