Subsurface annular safety barrier
US7543652B2 · kind B2 · utility
3Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2006 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Jun 26, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsurface annular safety barrier for controlling fluid flow in the tubing-casing annulus in an annular flow well. The barrier may be positioned proximate the top of a formation to block fluid flow through the annulus upon loss of casing integrity. An embodiment of the annular safety barrier includes a packer and a valve, wherein the valve is operated to a closed position without mechanical manipulation of the tubing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.