Apparatus and method for processing soil in a subterranean earth

Apparatus for forming and using a bore hole

Apparatus for guiding and steering an earth boring machine...

Ball and socket mounted hydraulic posthole digger and method for

Bearing assembly inner barrel and well drilling equipment...

Bearing assembly retaining apparatus and well drilling...

Bits for use in drilling with casting and method of making...

Casing hammer assembly for cable tool drilling apparatus

Collapsible spider for use in supporting casing during upward dr

Compact power swivel

Deep water drilling with casing

Device for connecting a tool to a drive

Device for drilling, in particular percussion drilling or...

Device for joining threaded rods and tubular casing elements for

Device for reaming and collecting dust, for a drilling apparatus

Down hole hammer assembly

Downhole filter

Drill box support mechanism for mining bolter machines

Drill rig

Drill string valve actuator