ANNULAR BARRIER WITH AN EXPANSION DETECTION DEVICE
First Claim
1. An annular barrier to be expanded in an annulus between a well tubular structure and an inside wall of a borehole downhole, comprising:
- tubular part for mounting as part of the well tubular structure, said tubular part having 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 means of a connection part, where 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, andan 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, 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.
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0 Petitions
Accused Products
Abstract
The present invention relates to an annular barrier (1) to be expanded in an annulus (2) between a well tubular structure and an inside wall (4) of a borehole (5) downhole, comprising a tubular part for mounting as part of the well tubular structure, said tubular part (6) having a longitudinal axis; an expandable sleeve (7) surrounding the tubular part and having an outer face (8), each end (9, 10) of the expandable sleeve being fastened to the tubular part by means of a connection part (12), where 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 (13) between the tubular part and the expandable sleeve; an aperture (11) in the tubular part for letting fluid into the annular barrier space to expand the sleeve; and an activatable shut-off valve (14) having an open and a closed position and arranged in the aperture, wherein the annular barrier further comprises a detection device (20) for detecting when the expandable sleeve has been expanded into a contact position, 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. Furthermore, the invention relates to a downhole system comprising a plurality of annular barriers according to the invention and to a method for expanding an annular barrier.
17 Citations
15 Claims
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1. An annular barrier to be expanded in an annulus between a well tubular structure and an inside wall of a borehole downhole, comprising:
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tubular part for mounting as part of the well tubular structure, said tubular part having 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 means of a connection part, where 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, 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification