WELL PACKER Russian patent published in 2019 - IPC E21B33/12 

FIELD: mining.

SUBSTANCE: invention relates to the packers. Well packer contains cylindrical hollow body with installed on the outside at least two collars and annular stops between them and the bottom collar between two body supports with the possibility of limited axial longitudinal movement relative to the body, an anchor with the conical inner surface, responsively executed the lower stop outer surface, provided with slips on the side surface and mounted with the possibility of limited axial movement with the possibility of interaction with the lower stop. In the annular stop between the collars, an annular bore is made with a collar installed therein from swellable in the borehole medium material.

EFFECT: reducing the packer leaks likelihood.

1 cl, 1 dwg