HYDRAULIC JACK ANCHOR FOR INSTALLATION OF PROFILED SHUTTER IN WELL Russian patent published in 2013 - IPC E21B23/06 

FIELD: mining.

SUBSTANCE: anchor comprises a hollow body with an upper thread for connection with a pipe string, extended plates and lower thread for connection with a hydraulic jack. At the same time the lower thread is arranged on a hollow pusher telescopically at the bottom inserted as capable of longitudinal displacement upwards to the body, where conical recesses are arranged, which narrow to the bottom. At the same time plates are equipped from inside with inclined surfaces made as capable of displacement along conical recesses of the body upwards together with a pusher, which supports at the bottom with the possibility of radial displacement. Inside the pusher there are elastic elements pressed on top with the body, and at the bottom with a support with a cartridge case arranged from inside the elastic elements and inserted into the body as capable of longitudinal displacement. The pusher is equipped at the bottom with an adjusting screw that presses the stop.

EFFECT: increased reliability of a device by exclusion of spontaneous anchoring in process of equipment lowering into a well, its improved fixation in the specified interval and guaranteed return of wedging elements of an anchor in a transport position.

1 dwg