Annular barrier
US9359860B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2011 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Sep 27, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/127
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to an annular barrier for being expanded in an annulus between a well tubular structure and an inside wall of a borehole downhole. The annular barrier comprises a tubular part for mounting as part of the well tubular structure; an expandable sleeve made of a first metal, surrounding the tubular part and defining a space being in fluid communication with an inside of the tubular part, the expandable sleeve having a longitudinal extension, an inner face facing the tubular part and two ends; a connection part made of a second metal, connecting the expandable sleeve with the tubular part; an opening for letting fluid into the space to expand the sleeve, and a transition area comprising a connection of the sleeve with the connection part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.