DRILLABLE PACKER Russian patent published in 2010 - IPC E21B33/12 

FIELD: oil and gas production.

SUBSTANCE: drillable packer comprises setting tool, made of cylinder and piston with hollow stem and technological bush on top, hollow cylindrical case with thread on external surface, body-mounted sealing element with upper and lower supports and conical supports, upper and lower bowl slip sockets arranged with the possibility of longitudinal displacement along conical surfaces of supports, upper and lower pushers. Upper pusher is equipped with fixator, and lower one - with shear ring for connection to stem of setting tool piston. Circular sectors of bowl slip sockets are rigidly connected to each other by breakable bridges, lower pusher is plugged and rigidly joined to hollow case. Supports are arranged as split with the possibility of breakage as the load exceeds strength limit. On external surface of piston process bush there is an external bore for cylinder unsealing in the end of piston working stroke. Fixator arranged in the form of segments is pressed to upper pusher by spring element.

EFFECT: simple and easy to produce structure, reliable fixation of sealing element in well in packered condition, possibility to perform reliable tight isolation of well shaft under conditions of operating strings variation in wall thickness and to perform works in well above the packer.

3 dwg