DRILLABLE PACKER (VERSIONS) Russian patent published in 2014 - IPC E21B33/12 

FIELD: mining.

SUBSTANCE: packer comprises a mandrel with a fixed stop, sealing element, bottom and top cones and grippers, and a split nut. The upper anchor is additionally fitted with a thruster. On cones, fixed stop and thruster the T-shaped or dovetail slots are provisioned. The grippers from both ends are fitted with lugs of companion design, forming gliding a kinematic pair "crosshead - guide" with mating parts.

EFFECT: qualitative intensification of the process of stirring of components in general Improvement of reliability of the packer in a seating position and shortening time of its drilling out.

2 cl, 3 dwg