Patent ID: 9366107
Filing Date: 2016-06-14
CPC Classification: E21B

Claim Text:
1. An annular barrier to be expanded in an annulus between a well tubular structure and an inside wall of a borehole downhole, comprising: a tubular part for mounting as part of the well tubular structure, said tubular part having a longitudinal axis, an inflatable, expandable sleeve surrounding the tubular part and having an outer face positioned to contact the inside wall, the expandable sleeve being of metallic construction and the outer face having no apertures, each end of the expandable sleeve being fastened to the tubular part by means of a connection part, where at least one of the connection parts is a sliding connection part sliding in relation to the tubular part when the expandable sleeve is expanded, an annular barrier space between the tubular part and the expandable sleeve, an aperture in the tubular part for letting fluid into the annular barrier space to expand the sleeve, and an activatable shut-off valve having an open and a closed position and arranged in the aperture, wherein the annular barrier further comprises a detection device for detecting when the expandable sleeve has been expanded into a contact position in which the outer face of the sleeve contacts the inside wall, and wherein the detection device is adapted to provide a signal to activate the shut-off valve to bring the shut-off valve from the open to the closed position when detecting that the expandable sleeve is in the contact position.