DOWNHOLE COMPLETION SYSTEM Russian patent published in 2020 - IPC E21B33/127 

FIELD: soil or rock drilling; mining.

SUBSTANCE: group of inventions relates to the scanner rigging system, a verification method for checking zone isolation. Monitoring method for well condition monitoring. Well completion system comprises production casing installed in borehole and system of annular barrier intended for expansion in annular space between production casing string and the well bore wall or other well tubular structure in the well to provide insulation of the zone between the first zone having the first pressure and the second zone having the second pressure of the well bore. Annular barrier system also comprises annular barrier. Annular barrier comprises tubular metal part installed as part of production casing string. Tubular metal part has outer surface. Annular barrier also comprises expanding metal coupling surrounding tubular metal part. Each end of expanding metal coupling is connected to tubular metal part. Annular barrier comprises annular space between inner surface of expanding metal coupling and tubular metal part, wherein annular space has space pressure. Annular barrier system additionally comprises a sensor device comprising at least a first pressure sensor connected to the first zone and a second zone for measuring the first and second pressure for checking insulation of the zone.

EFFECT: technical result is the creation of annular barriers, insulation and sealing properties of which can be tested.

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