Roller cone bit with improved seal gland design
Roller cone bits, methods, and systems with anti-tracking...
Roller cone drill bit having lubrication contamination...
Roller cone drill bit with debris flow paths through...
Roller cone drill bits with enhanced drilling stability and...
Roller-cone bits, systems, drilling methods, and design methods
Roller-cone bits, systems, drilling methods, and design...
Rotary digging and compression enlarging driller and boring...
Rotary drag bits having a pilot cutter configuraton and...
Rotary drill bit and method of forming bore hole
Rotary drill bit insert
Rotary drill bit providing separation of liquid from gas
Rotary drill bits with gage pads having improved...
Rotary drill guard assembly and method
Rotary drill indexing system
Rotary drilling drill string stabilizer-cuttings grinder
Rotary driven pipe-bursting tool
Rotary sidewall sponge coring apparatus
Rotary steerable devices and methods of use
Rotary steerable drilling tool