Machine for boring a large diameter blind hole

Machine for horizontal percussion boring

Machine for making underground excavations

Machine operating according to the Moineau-Principle for the...

Machined drill steel

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

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

Magazine and manipulating apparatus for drilling rod parts

Magazine for storing drill string elements

Magnetic face seal for rock drill bit bearings

Magnetorheological fluid apparatus, especially adapted for...

Maintenance and extraction of poles

Maintenance screw drill/conveyor tool and method for maintenance

Make up system of a down-the-hole hammer

Male portion, drill bit and threaded joint for percussive...

Mandrel and bearing assembly for downhole drilling motor

Maneuvering impact boring head

Manhole cutter

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

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