Air pressure impact drilling method and apparatus for same
Apparatus for supporting and rotating a down hole tubular
Cable-tool casing hammer
Clamping attachment to a device for driving rod elements of low
Clamping means for a device for driving flexible rod-shaped elem
Coal-compacting power-hammer rod activator
Device for gripping and raising tamping tools or for holding rai
Drill head assembly
Drillhead unit
Electrically operated impact tool
Gripping tool adapted for use with device for driving rod-shaped
Ground rod driver
Ground rod driving apparatus
Hammer for removing gates or risers from castings
Impact devices
Pile driving apparatus
Pile driving apparatus
Pipe gripping device
Pipe gripping device
Portable drilling machine