ANNULAR BARRIER WITH EXPANSION MODULE Russian patent published in 2020 - IPC E21B33/128 

FIELD: drilling of wells.

SUBSTANCE: present invention relates to annular barrier, intended for expansion in annular space between well tubular structure and wellbore wall to provide insulation of zone between first zone having first pressure and second zone, wherein annular barrier comprises tubular metal part intended for installation as part of well tubular structure, wherein tubular metal part has first unclasping opening, length in axial direction and outer surface, expanding coupling surrounding tubular metal part and having inner surface facing tubular metal part, and outer surface, facing the wellbore wall, wherein each end of the expansion sleeve is connected to the tubular metal portion, and an annular space between the expanding coupling inner surface and the tubular metal portion, wherein annular space has space pressure, wherein fluid medium inside tubular metal part has tubular pressure, and annular barrier comprises expansion module having first inlet, connected with possibility of fluid medium transfer with unclasping opening, second inlet port connected with possibility to transfer fluid medium with first zone, and outlet hole, connected with possibility of fluid medium transfer with ring-shaped space, at that, expanding module contains element, configured to move between at least a first position and a second position, wherein in the first position, the unclasping opening is connected with the possibility of the fluid transferring to the outlet opening, wherein the pipe pressure is higher than the first pressure, and in second position, outlet opening is connected with possibility of fluid medium transfer with first zone, at that first pressure is higher, than pipe pressure, wherein the tubular metal part comprises at least one second unclasping opening communicating with the first inlet.

EFFECT: present invention also relates to well system.

15 cl, 10 dwg