Annular flow safety valve and methods
US6435282B1 · kind B1 · utility
22Cited by
13References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2000 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Oct 17, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/066
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present inventions contemplate improved annular flow safety valve apparatus and methods in which the valve comprises a bi-directional self-contained electromechanically operated valve assembly including a moveable seal, power source, electric motor, and control system, capable of operating with or without power or control inputs from the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.