Annular barrier with a self-actuated device
US9518439B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2012 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Jul 19, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/102
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An annular barrier to be expanded in an annulus between a well tubular structure and an inside wall of a borehole downhole, includes a tubular part for mounting as part of the well tubular structure. The tubular part has a longitudinal axis, an expandable sleeve surrounding the tubular part and having an outer face, each end of the expandable sleeve being fastened to the tubular part by a connection part, an annual barrier space between the tubular part and the expandable sleeve, an aperture in the tubular part or the connection part for letting fluid into the space in order to expand the sleeve, and a self-actuated device arranged in the aperture having an open and a closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.