WELL COMPLETION SYSTEM Russian patent published in 2023 - IPC E21B33/127 E21B47/117 

FIELD: wells.

SUBSTANCE: invention relates to a well completion system comprising a production casing string installed in the wellbore and an annulus barrier system designed to expand in the annulus between the production casing string and the wall of the wellbore or other downhole tubular structure in the wellbore to provide isolation of the zone between the first zone with a first pressure, and a second zone with a second wellbore pressure. The well completion system comprises an annular barrier containing a tubular metal part configured to be installed as part of a production casing string. The tubular metal part has an outer surface, an expandable metal sleeve surrounding the tubular metal part and having an inner surface of the sleeve facing the tubular metal part, and an outer surface of the sleeve facing the borehole wall. Each end of the expandable metal sleeve is connected to the tubular metal part, and an annular space between the inner surface of the expandable metal sleeve and the tubular metal part. The annulus has a space pressure, and the well completion system further comprises a sensor device associated with the first zone and/or the second zone, respectively. The annulus barrier system additionally comprises a sensor device located in the first zone and containing the first pressure sensor, connected with the possibility of fluid transfer, with the first zone through the first fluid channel and configured to measure the first pressure of the first zone, and the second pressure sensor, fluidly coupled to the second zone via a second fluid conduit and configured to measure a second pressure of the second zone to test zone isolation. The present invention also relates to a test method for checking zone isolation and a monitoring method for monitoring a well condition.

EFFECT: invention makes it possible to simplify and improve the accuracy of testing the insulating ability of the annulus barrier during well operation.

17 cl, 14 dwg