PACKER-ANCHOR EQUIPMENT FOR SELECTIVE TREATMENT OF FORMATION Russian patent published in 2013 - IPC E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: packer-anchor equipment for selective treatment of a formation includes a stock, a sealing element, a housing, an adepter and a valve. On the packer stock there installed is composite sealing element, upper and lower cones, from above and from below of which upper and lower casings are arranged. Upper and lower supports are installed in slots of casings. Upper casing is connected to the housing, and lower casing is connected to the adapter. There is a key in the housing slot. A hydraulic anchor is connected to the lower adapter. A valve body, inside which protective rings with a sealing cuff pressed from below with a nut and a lock nut are installed, is attached to lower part of the hydraulic anchor. A mechanical anchor is attached to the valve lower part. Inside the packer-anchor equipment there is a valve sealing device fixed in the upper adapter of the packer through a support. The valve sealing device consists of a bar, a rod, on which a fastener installed, and a lock nut screwed onto upper part of the device.

EFFECT: invention allows improving efficiency of works performed in a well, which are related to selective treatment of a formation, interval-by-interval pressure test of a production string, search of leakage using two packers, providing possibility of transfer of torque moment to a pipe string or equipment, which are installed under the packer, ensuring reliable retention of the packer against downward movement at creation of high pressure drops, and providing tight closing of a through channel of the packer.

1 cl, 1 dwg