DRILL ROCK BIT WITH SEALED SUPPORT Russian patent published in 2011 - IPC E21B10/25 

FIELD: mining.

SUBSTANCE: drill rock bit with a sealed support includes a body of welded leg sections, on journals of which there are cutters movably fixed with rock cutting elements and cavities of supports with end seals in the form of contacting and pressing elements, in which a pressing element is arranged in the form of a spring frame coated with an elastic layer, having a circular cylindrical base, which is tightly put onto the journal, separate elastic conical tabs in the form of cantilevers with one end fixed on the base via an intermediate curvilinear part so that between a generatrix of the cylindrical base and a generatrix of the tabs cone there is an angle α>90°, and between the tabs and the cone surface of a slot in the cutter there is a solid contact ring installed. Between the tabs and the leg end under the contact ring there might be a thrust elastic ring installed.

EFFECT: increased reliability and durability of a drill bit with a sealed oil-filled support.

2 cl, 6 dwg