SUPPORT OF ROLLING CUTTER DRILLING TOOL Russian patent published in 2012 - IPC E21B10/25 

FIELD: mining.

SUBSTANCE: support of rolling cutter drilling tool includes cutter installed on leg journal and sealing assembly arranged in annular slot between leg and cutter, which includes elastic ring with U-section, in the cavity of which an additional mountain-shaped ring is located. At least, one side wall of annular slot is located at an acute angle to journal axis; at that, between the main and additional rings there arranged with tightening is a split ring from spring steel with chute-shape cross section the end sections of which are made in the form of a comb, projections of one end of which enter the cavities of the other end; at that, when in initial position, projections of ridges of one ring edge are installed with a gap relative to bottom of slots of the other edge. Version of design at least of one side wall of U-shaped cuff facing the cutter with projections reinforced with wear-resistant coating is proposed.

EFFECT: improving operating efficiency of the whole bit.

4 cl, 2 dwg