PACKER Russian patent published in 1998 - IPC

FIELD: oil and gas production industry. SUBSTANCE: this relates to packers combined with anchor of multiple action. Packer has rod with slot. Mounted on rod are sealing member, upper and lower anchoring units, and cones with inner protrusion. They are located respectively above and under sealing member. Lower anchoring unit carries detent and adapter. Secured on upper end of rod is adapter. Part of rod is provided with upper and lower protrusions and is located inside upper cone. It is made with additional inner protrusion which interacts with lower protrusion of rod. Located between upper protrusion of rod and additional protrusion of upper cone is spring. Distance between lower protrusion of rod and additional protrusion of upper cone is not less than distance of movement of upper cone to point at which slips of upper anchoring unit engage lower end of adapter. EFFECT: high efficiency. 3 dwg