Patent ID: 7748475

Claim:
A drill bit for drilling a subterranean formation subsequent to drilling through at least one of a component and a material at a distal end of a casing or liner string, the drill bit comprising: a bit body having a face at a leading end thereof; a first plurality of cutting elements of at least one type disposed over the bit body, cutting elements of the at least one type each exhibiting an exposure; a second plurality of cutting elements of at least another, different type disposed over the bit body, each cutting element of the at least another, different type exhibiting an exposure relatively greater than an exposure of a proximate cutting element of the at least one type, each of at least some of the cutting elements of the second plurality comprising: an at least substantially flat front cutting face; a rear surface oriented non-parallel to the at least substantially flat front cutting face; and at least one side surface extending around a periphery of each of the at least some of the cutting elements of the second plurality between the at least substantially flat front cutting face the rear surface of the cutting element, the at least one side surface defining a base on one side of the cutting element and an outer edge for cutting on an opposite side of the cutting element from the base, the base having a thickness different from a thickness of the outer edge for cutting.