Insert for a drill bit incorporating a PDC layer having extended side portions

摘要

A drag bit is formed of an elongate tooth made of tungsten carbide and having an elongate right cylinder construction. The end face is circular at the end of a conic taper. The tapered surface is truncated with two 180 DEG spaced flat faces at 15 DEG to about 45 DEG with respect to the axis of the body. The end is capped by a PDC layer.