FIELD: mechanics.
SUBSTANCE: invention refers to oil and gas industry, and namely to devices for lowering casing strings, and namely casing liners in order to seal the area behind the string. It includes a hollow housing, perforated connection pipe and liner, which are connected to each other by means of clamps. Hollow housing is connected to disconnecting piece which is connected to transportation column with top cementing plug installed in it. Disconnecting piece is equipped with a shell from above, which has the possibility of tight interaction with internal walls of hollow housing, and from below it is equipped with a hollow connection pipe and a hollow stock with holes telescopically installed in it from below. Hollow stock has the possibility of interacting with check valve when in operating position. Packer and anchor are installed in upper part of hollow housing.
EFFECT: possibility of simplifying the device design, owing to which number of process operations is reduced and probability of accidents occurrence in well is decreased.
2 dwg
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