FIELD: oil and gas industry.
SUBSTANCE: downhole device includes a swelling element containing a swelling elastomeric material capable of being expanded under action at least of one preliminary certain fluid medium and the first anchor area made on or around radial external surface of swelling element and intended for anchor attachment of swelling element to the surrounding surface at its swelling. As per the second version, downhole device includes a swelling element containing a swelling elastomeric material capable of being expanded under action at least of one preliminary certain fluid medium, and a support assembly located together with the swelling element intended for arrangement of some part of swelling element after its axial expansion and containing a flared part meant for development out of the retracted position and having the configuration that provides the arrangement of the swelling element end and expansion around it at expansion of the swelling element, and the first anchor area made on external radial surface of the flared part and adapted for anchor attachment of the swelling element to the surrounding surface at its expansion.
EFFECT: providing protection of downholes completed by drilling against movement in them.
20 cl, 3 dwg
