Drill bit and roller cutter for said drill bit

Drill bit assembly

Drill bit assembly

Drill bit assembly having pivotal cutter blades

Drill bit assembly with an indenting member

Drill bit cutter mounting system providing selectable orientatio

Drill bit for directional drilling

Drill bit having a fluid course with chip breaker

Drill bit lubricant with enhanced load carrying/anti wear...

Drill bit reverse circulation apparatus and method

Drill bit steering

Drill bit with hard-faced bearing surfaces

Drill bit with improved insert cutter pattern and method of dril

Drill bit with protection member

Drill bit with suction and method of dry drilling with liquid co

Drill bit with wedge shaped eduction jets

Drill bit, drilling system, and related methods

Drill bits with controlled exposure of cutters

Drill bits with enclosed fluid slots and method

Drill bits with enhanced hydraulic flow characteristics