Boring apparatus
Device and method for augering a conical hole in solid media
Device for drilling in and/or lining holes in earth
Device for fixing disk cutter to tunnel excavator
Downhole drill bit and bit coupling
Drill
Drill bit for core boring
Drill tool
Drilling apparatus having a radially displaceable reamer
Eccentric drilling tool
Extendable bit
Flushing means for drilling tools
Laterally adjustable drilling tool
Locking system for a firing mechanism of a downhole tool
Means for drilling
Means for drilling
Retractable core drill bit
Retractable drill bit system
Retractable well drilling bit
Retraction system for a latching mechanism of a tool