SWELLING DOWNHOLE PACKER Russian patent published in 2016 - IPC E21B33/129 

FIELD: mining.

SUBSTANCE: invention relates to packers with swelling materials. Downhole swelling packer comprises cylindrical hollow housing with swelling cuff installed from outside, capable of increasing volume under action of at least one predetermined fluid medium, and one or two armatures, made in form of connected to packer body bushings with plates, which are equipped from outside with notches and made with possibility to surround collar corresponding ends from outside after its swelling with fixation at that relative to well walls. Between bushing of armature and end of collar there is a cone-shaped pusher configured for longitudinal movement relative to body towards bushing upon swelling of collar with expansion of plates until pressing them to well walls. In pusher there are holes connecting space at end of collar with borehole space.

EFFECT: technical result is creating of reliable structure, excluding probability of fixation abating and packer pressing at expiration of time.

1 cl, 3 dwg