Cutting structures for roller cone drill bits are disclosed. One aspect is a drill bit which includes a bit body, and a plurality of roller cones attached to the bit body and able to rotate with respect to the bit body. The bit further includes a plurality of cutting elements arranged on each of the...http://www.google.com/patents/US6601660?utm_source=gb-gplus-sharePatent US6601660 - Cutting structure for roller cone drill bits