Patent ID: 7278499

Claim:
A rotary drag bit for drilling subterranean formations, comprising: a bit body having a face extending from a longitudinal axis to a gage; at least one aperture for communicating drilling fluid from an interior of the bit body to the face thereof; a plurality of blades comprising an abrasive material configured for drilling a subterranean formation, the plurality of blades extending generally radially outwardly toward the gage; and an inverted cone region including a central region thereof radially proximate the longitudinal axis, the central region including a plurality of cutting structures affixed thereto and arranged about the longitudinal axis along at least one spiral path, wherein the at least one spiral path encircles a center of revolution thereof at least once within the inverted cone region and wherein at least some cutting structures of the plurality of cutting structures each substantially abut at least one other circumferentially and radially adjacent cutting structure lying along the at least one spiral path.