Mechanical bi-directional isolation valve
US9784057B2 · kind B2 · utility
3Cited by
36References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2008 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Jan 17, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A valve having a sealing surface that is rotated 90 degrees on axial floating hinge assemblies is provided. A sleeve moves into position to protect the valve mechanism when the valve is in an open position. A sleeve locks the valve sealing element in place in either a closed or open position. The valve may be used during drilling of wells to prevent flow into the casing when the drill pipe and bit are raised above the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.