ANNULAR BARRIER WITH PRESSURE AMPLIFICATION

摘要

An annular barrier (1) to be expanded in an annulus (101) between a well tubular structure (300) and an inside wall of a borehole for providing zone isolation between a first zone (102) and a second zone (103) of the borehole, comprising a tubular part (2) for mounting as part of the well tubular structure and having an expansion opening (9), an expandable sleeve (3) surrounding the tubular part, each end of the expandable sleeve being connected with the tubular part, and a space between the tubular part and the expandable sleeve, wherein the annular barrier further comprises a pressure intensifying means (10) having an inlet (11) in a first end in fluid communication with the expansion opening and having an outlet (12) in a second end in fluid communication with the space.