PACKING UNIT OF PACKER Russian patent published in 2019 - IPC E21B33/12 

FIELD: machine building.

SUBSTANCE: invention relates to sealing assembly of packer. Seal packer assembly includes collars made in the form of elastic elements separated by spacer rings, end calibration rings arranged on both sides of the collars, and a sleeve installed with possibility of axial movement and interaction with collars. Packer packer assembly also includes detachable mandrel with stepped outer surface installed relative to hollow packer housing with circular clearance for circulation. Sleeves are made of rubber with different Shore hardness. Calibration end rings are installed with the possibility of axial movement at the smaller stage of the mandrel, the end of which along the outer surface is threaded for connection to the hydraulic anchor. End of larger step of mandrel over outer surface is made with stepped end section, coupled with stepped end section, made on inner surface of sleeve, connected by threaded connection to end ring of calibration, installed on side of sleeve. Other calibrating end ring is threaded along the inner surface for connection to the hydraulic anchor.

EFFECT: technical result is increase in reliability.

1 cl, 4 dwg