Threaded cone retention system for roller cone bits
Threaded ring retention mechanism
Three dimensional steering system and method for steering...
Thrust control apparatus
Tool and method for drilling a hole with an increased cross-sect
Tool and method for drilling, reaming, and cutting
Tool and method for soil sampling
Tool for changing the drilling direction while drilling
Tool for controlling rotation of a bottom hole assembly with...
Tool string apparatus for lateral borehole formation
Tooth design to avoid shearing stresses
Top drive torque reactor
Torque absorber for downhole drill motor
Tractor with improved valve system
Treatment of weighted drilling mud
Triangular core cutting tool
Truck mounted boring system
Truck mounted drilling machine
Tubular drill string member with contoured circumferential surfa
Tubular element for use in a rotary drilling assembly