PDC BITS HAVING ROLLING CUTTERS AND USING MIXED CHAMFERS

摘要

A cutting tool cutting tool may include a tool body having a plurality of blades extending radially therefrom, a plurality of rotatable cutting elements having a first chamfer mounted on at least one of the plurality of blades, and a plurality of non- rotatable cutting elements having a second, distinct chamfer mounted on at least one the plurality of blades.