WELL EXPANDING METAL TUBULAR ELEMENT Russian patent published in 2020 - IPC E21B33/12 

FIELD: drilling of wells.

SUBSTANCE: group of inventions relates to a downhole expanding metal tubular element, an annular barrier, well completion equipment and a method of sealing. Downhole expanding metal tubular element is intended for opening in the well from the first outer diameter to the second outer diameter with provision of abutment to inner surface of casing string or borehole and has external tubular surface, extended in longitudinal direction and comprises first circular edge and second annular edge, provided on outer tubular surface. First annular edge and second annular edge form part of groove provided on outer tubular surface of downhole expanding tubular metal element. Groove has length along longitudinal direction. Annular sealing element is located in groove between annular edges. Downhole expanding metal tubular member comprises an annular resilient member, having part of outer surface facing in direction from outer tubular surface, and having length along longitudinal elongation. Length of annular resilient element is smaller than said length. Annular sealing element comprises space located adjacent to annular resilient element in longitudinal direction. Annular sealing element also comprises first part of annular sealing element, at least partially covering said part of annular resilient member outer surface. Annular flexible element is located between said part of annular sealing element and external tubular surface. Annular sealing element has at least one recess accommodating annular resilient element. At least one recess is located in groove.

EFFECT: technical result is increased ability of seal to withstand high pressure and temperature in well.

17 cl, 32 dwg