Device for temporarily closing duct-formers in well...

Device for testing rock samples under relatively high...

Device for the demolishing and removal of earthwork, in...

Device for the quantitative analysis of debris

Device for the remote actuation of an appliance associated...

Device for throwing hardened steel balls

Device for turning the feed device of a rock drill

Device for use in a fluid exploitation well, exploitation...

Device for widening an earth borehole

Device in core barrels

Device in hammer machines

Device in impact machines

Device in impact machines

Device in impact machines

Device in rock drilling machines

Device in rock or earth drilling apparatus for rotary drilling

Device method for pumping viscous liquid from horizontal...

Device of a test plug

Device particularly intended for long-hole drilling at...

Device related to risers