PACKER Russian patent published in 2012 - IPC E21B33/1295 

FIELD: oil and gas production.

SUBSTANCE: packer includes hollow shaft, sealing elements with stops mounted on the shaft, anchor unit that consists of casing with cone with slots and plates installed in them, connected to hydraulic cylinder piston via rods, the cavity of the cylinder is connected to the cavity of the shaft through radial channel and extension-type connection pipe mounted at the lower end of hollow plunger. Note that the piston is spring-loaded downwards in relation to the cylinder - to transport position and the rods are assembled consisting of upper, pin-connected to the plates, and lower, spherically-connected to the piston, parts that are interconnected via threaded connection adjusting the rod length. Sealing elements on outer surface contacting the stops can be equipped with facets, the quantity of sealing elements can exceed two and additional intermediate stops can be arranged between them, under the sealing elements there can be installed a driving washer rigidly connected to the corresponding intermediate support.

EFFECT: extension of packer functional capabilities for operation in slope-directed and horizontal areas of the wells, increase of packer reliability, simplification of packer assembly.

5 cl, 2 dwg