Horizontal earth boring machine and method

Hydraulic drilling apparatus and method

Hydrojet drilling means

In-situ drilling system with dust collection and overload...

Liquid lift method for drilling risers

Load compensator for a pipe running tool

Long range electronic guidance system for locating a...

Macro assisted control system and method for a horizontal...

Macro assisted control system and method for a horizontal...

Mapping tool for tracking and/or guiding an underground...

Mapping tool for tracking and/or guiding an underground...

Mapping tool for tracking and/or guiding an underground...

Method and a device for directional control of a rock...

Method and a device for drilling with several tools in simultane

Method and an equipment for adjusting rock drilling

Method and apparatus for attaching/detaching drill rod

Method and apparatus for automatic closed loop drilling system

Method and apparatus for bottom hole measurement

Method and apparatus for controlling the rotational torque of a

Method and apparatus for determining potential for drill bit...