FIELD: mining.
SUBSTANCE: device comprises a housing with a channel, elastic sealing elements mounted therein on it, between which a piston pair with the sealing rings is placed, and the retaining nut. The working chamber of the piston pair is connected with the housing channel, and in its cylinder a radial hole is made with the ability of communication with the working chamber of the piston pair when packing the well with elastic sealing elements and the additional compression of the elastic sealing elements when hydraulic fracturing pressure with self- locking of the isolated part of the well. The elastic sealing elements are made of soft material and reinforced with rigid elements with different elastic properties.
EFFECT: increase in the sealing capacity of the device and the elastic properties of the elastic sealing elements.
2 dwg
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