Hybrid rolling cone drill bits and methods for manufacturing same

摘要

A rolling cone drill bit for drilling a borehole in earthen formations includes a bit body having a bit axis. In addition, the rolling cone drill bit includes a rolling cone cutter mounted on the bit body and having a cone axis of rotation. The cone cutter includes a cone body, a plurality of teeth arranged in a first inner row, and a plurality of inserts. Each insert is disposed within one tooth in the first inner row.

主权项

1. A rolling cone drill bit for drilling a borehole in earthen formations, the bit comprising:
a bit body having a bit axis; and a first rolling cone cutter mounted on the bit body and having a cone axis of rotation; wherein the first cone cutter includes a cone body having an outer surface, a plurality of teeth extending from the outer surface of the cone body, and a plurality of inserts, wherein the plurality of teeth are arranged in a first inner row; wherein each insert is disposed within one tooth in the first inner row, and wherein each insert extends from the corresponding tooth through the outer surface of the cone body into the cone body.