SEALING ASSEMBLY OF THERMAL PACKER Russian patent published in 2012 - IPC E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: sealing assembly of thermal packer includes shaft with coupling, rod with expanding cone of anchor slips, mandrel in axial channel of the shaft, seal in bore of adapter, which is pressed with bottom box through a shank, seal of thermal packer between upper and lower supports equipped with extrusion washers. Lower support of packer is equipped with longitudinal slots uniformly arranged along the perimetre and rigidly attached to upper end of the rod of expanding cone with holder, on outer surface with internal projections entering longitudinal slots with possibility of axial movement. Rod is equipped with a nut and bandage installed with possibility of enveloping the lower support and formation of a gap with the holder end. Seal of mandrel is equipped with a scraper in the form of a ring with internal bore and longitudinal slots on end surfaces installed in internal bore of a shank with possibility of interacting with bottom box and external surface of mandrel.

EFFECT: reduction of the applied axial load in order to remove the packer from the well; protection of seal of mandrel against wear.

6 dwg