Method and apparatus for controlling the rotational torque of a

Method of and apparatus for directional drilling

Method of and apparatus for directional drilling

Method of and system for monitoring drilling parameters

Method of controlling rock drilling

Method of predicting and controlling the drilling trajectory in

Methods and apparatus for controlled directional drilling of bor

Navigable downhole drilling system

Positioning device for a member and drilling system employing sa

Process and device for guiding a drilling tool through geologica

Realtime control of a drilling system using the output from...

Remote control for a drilling machine

Self-propelled instrumented deep drilling system

Stalled motor by-pass valve

Steerable burrowing mole

Steerable ground drilling devices

Steering sub for flexible drilling

System and method for tracking and communicating with a...

System for continuously guided drilling

System for directional drilling and related method of use