ANNULAR BARRIER HAVING EXPANSION TUBES

摘要

The present invention relates to an annular barrier (1) for mounting as part of a well tubular structure (3), the annular barrier being adapted to be expanded in an annulus (2) between the well tubular structure and an inside wall (41) of a borehole (4). The annular barrier comprises a tubular part (6) extending in a longitudinal direction, one or more an expandable tube(s) (7) each having a centre axis (72) extending outside the tubular part in the longitudinal direction, and a sealing element (8) in the form of an expandable sleeve provided on an outer surface of the one or more expandable tube(s) for providing sealing against the inside wall of the borehole, the expandable sleeve extending on the outside of the one or more expandable tube (s). Furthermore, the invention relates to a method of expanding an annular barrier in an annulus and to a downhole system.

主权项

1. An annular barrier for mounting as part of a well tubular structure, the annular barrier being adapted to be expanded in an annulus between the well tubular structure and an inside wall of a borehole for sealing off a hydro carbon-producing zone of a formation, and the annular barrier comprising:
a tubular part extending in a longitudinal direction, one or more expandable tubes each having a centre axis extending outside the tubular part in the longitudinal direction, and a sealing element in the form of an expandable sleeve provided on an outer surface of all of the expandable tube(s) for providing sealing against the inside wall of the borehole, the expandable sleeve extending on the outside of all of the expandable tube(s) in relation to the tubular part and being attached to a connection art or being attached to the tubular art.