Patent ID: 7841427

Claim:
A PDC drill bit for subterranean drilling or forming boreholes in subterranean formations comprising: (a) a drill bit body; (b) a central cutting member for enhancing the efficiency of the PDC bit at the center of the drill bit body, the central cutting member comprising: (1) an end portion for engaging the drill bit body; (2) a member adjacent the end portion, wherein the member comprises a center and an edge; and (3) a plurality of cutters supported by the member, the plurality of cutters each comprising: a cutting surface comprising a base surface disposed against the member and extending radially between the center and the edge, and an inner surface extending upward from the center and terminating proximate to the inner surface of each other cutter at an apex, wherein the cutting surface comprises a side rake angle that provides an overlapping relationship between each cutting surface such that the PDC bit provides an aggressive cutting structure at the center of the PDC bit.