Adjustable gauge downhole drilling assembly
Adjustable gauge downhole drilling assembly
Adjustable winged centering tool for use in pipes with...
Apparatus and method for drilling and reaming a borehole
Apparatus for drilling underground arcuate paths and installing
Apparatus for gripping a shaft or the like
Apparatus for preventing differential sticking in wells
Apparatus for use in a wellbore
Axle, a friction reducing fitting and an axle installation...
Bit retainer system
Bit-adjacent stabilizer and steel
Blade stabilizer provided with at least one fluid passage having
Borehole conditioning apparatus
Breakable washer earth boring bit
Casing tube with casing shoe
Centering device that can be engaged or disengaged, specifically
Clamp-on drill collar stabilizers
Collar mounted downhole tool
Combined stabilizer and reamer for drilling well bores
Compensating ring for a down hole hammer