Buoyant counterbalancing for drill string
Changeover bit for extended life, varied formations and steady w
Closed loop control system for diamond core drilling
Closed-loop control of hydraulic pressure in a downhole...
Closed-loop physical caliper measurements and directional...
Combining belief networks to generate expected outcome
Combining belief networks to generate expected outcomes
Command and control for boring system
Continuous feed drilling system
Controllable drill head
Controller and control method for orbit boring
Coring bit motor and method for obtaining a material core...
Device for adjusting the path of a rotary drilling tool
Device for controlling the orientation of bore holes
Device for controlling weight on bit of a drilling assembly
Device for drilling a hole in the side wall of a bore hole
Device for guiding a drilling tool into a well and for exerting
Device for remote actuating equipment comprising delay means
Device for remotely operating and assembly comprising a bean/nee
Devices and methods for power control in horizontal...