ANNULAR BARRIER
First Claim
1. An annular barrier configured to be arranged on an outer face of a well tubular metal structure for providing zonal isolation in an annulus downhole, comprising:
- an annular space defined by a first expandable metal sleeve part and a second expandable metal sleeve part, the first expandable metal sleeve part having an outer face configured to face away from the outer face of the well tubular metal structure and the second expandable metal sleeve part having an outer face configured to face the outer face of the well tubular metal structure when arranged around the well tubular metal structure,wherein the annular barrier further comprises a first inner annular sealing element arranged on the outer face of the second expandable metal sleeve part configured to seal between the second expandable metal sleeve part and the well tubular metal structure.
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Abstract
The present invention relates to an annular barrier configured to be arranged on an outer face of a well tubular metal structure for providing zonal isolation in an annulus downhole, comprising: an annular space defined by a first expandable metal sleeve part and a second expandable metal sleeve part, the first expandable metal sleeve part having an outer face configured to face away from the outer face of the well tubular metal structure and the second expandable metal sleeve part having an outer face configured to face the outer face of the well tubular metal structure when arranged around the well tubular metal structure, wherein the annular barrier further comprises a first inner annular sealing element arranged on the outer face of the second expandable metal sleeve part configured to seal between the second expandable metal sleeve part and the well tubular metal structure. The invention also relates to a downhole system and a method of arranging an annular barrier on the outer face of the well tubular metal structure mounted from tubing parts or a joint for providing zonal isolation in an annulus downhole.
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Citations
15 Claims
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1. An annular barrier configured to be arranged on an outer face of a well tubular metal structure for providing zonal isolation in an annulus downhole, comprising:
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an annular space defined by a first expandable metal sleeve part and a second expandable metal sleeve part, the first expandable metal sleeve part having an outer face configured to face away from the outer face of the well tubular metal structure and the second expandable metal sleeve part having an outer face configured to face the outer face of the well tubular metal structure when arranged around the well tubular metal structure, wherein the annular barrier further comprises a first inner annular sealing element arranged on the outer face of the second expandable metal sleeve part configured to seal between the second expandable metal sleeve part and the well tubular metal structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
wherein the at least one annular barrier is arranged so that the aperture is arranged between the first inner sealing element and the second inner sealing element.
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15. A method of arranging an annular barrier according to claim 1 on the outer face of the well tubular metal structure mounted from tubing parts or a joint for providing zonal isolation in an annulus downhole, comprising:
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sliding the annular barrier onto and along one of the tubing parts or joints of the well tubular metal structure, activating the inner annular sealing element(s) by pressurising the annular space so that the second expandable metal sleeve part presses against the outer face of the well tubular metal structure, mounting the tubing part having the annular barrier as part of the well tubular metal structure, inserting the well tubular metal structure into a borehole providing the annulus around the well tubular metal structure, expanding the annular barrier by expanding at least the first expandable metal sleeve part into abutment against a wall of the borehole or another well tubular metal structure isolating one part of the annulus from another part.
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Specification