Patent ID: 8459382

Claim:
A rotary drill bit assembly for subterranean drilling, comprising: a bit frame comprising a plurality of blades, a plurality of cutters carried by each of the plurality of blades, and at least one receptacle configured as a socket in an axially leading face of at least one blade of the plurality located behind at least some of the plurality of cutters carried by the at least one blade; and a bearing block received within the socket with at least a portion thereof protruding above the axially leading face of the at least one blade, the bearing block comprising a body including an interface structure in substantially complementary engagement with surfaces of the at least one receptacle and comprising a circumferential body side wall and a support surface, and the at least a portion protruding above the axially leading face of the at least one blade comprises a rubbing surface configured with at least one rubbing area for contacting a subterranean formation during drilling.