RELEASED BIDIRECTIONAL PACKER ON CABLE Russian patent published in 2009 - IPC E21B33/12 

FIELD: mining.

SUBSTANCE: released bidirectional packer on cable includes setting tool on cable, stationary bushing with main seat and movable central rod, which is equipped with main stay nut and valve interacting with main seat, movable bushing, two opposing cones, screw-threaded dies connected between them in axial direction and designed to interact with corresponding cones, packer collar and boss made to interact with extraction unit. The stationary bushing is equipped in its middle part with a lengthwise groove, while its ends are equipped with main and additional seats and with upper and lower stops with bypass channels. Also the packer collar is made in form of an upper self-packing collar, is able to travel bottom-up and is located between the upper cone and the upper stop. A lower self-packing collar is situated between the lower cone and lower stop; this collar is able to travel downright; the movable bushing is set on the stationary bushing, it is equipped with a pin inserted into the lengthwise groove of the stationary bushing. Further screw-threaded dies are arranged on the movable bushing, are pressed inwards with spring rings and each of them is equipped with centralisers pressed outward. The central rod is equipped with upper and lower circular grove with the additional stay nut and the valve. The main and additional valves are assembled in corresponding upper and lower grooves and are able to limited displacement between the corresponding stops and interior edges of the corresponding circular grooves; also the valves are pressed from the stops to corresponding main and additional seats. The main and additional stay nuts are arranged at a uniform distance from the pin of the movable bushing and are able to interact with the pin; the boss is rigidly connected to the top of the central rod and is made in form of a cone tapered at the top, on the interior surface of which there is made a closed shaped slot with a groove connecting it with the upper edge of the boss. The setting tool is made in form of a branch with a pin inserted into the shaped slot, which is made so, that at reciprocal movement of the setting tool relative to the boss for the length exceeding the height of the shaped slot, the pin will be located within the limits of the shaped slot; if the length is less, then the pin will go into the groove of the shaped slot at travel upward.

EFFECT: simplification of packer design eliminating implementation of electric engine with cable and facilitating setting and disruption of packer in specified interval of well without special devices.

2 dwg