Back in "the old days" I recall "Varco" as pioneering top drives. Truth be told, most of my experience is in offshore drilling, so I'm not familar with Capstar and the smaller rigs.
Top drives can be a real money saver to the operator if the hands are trained to use them. Varco was a pioneer in a lot of our tools, but CanRig is probably the premiere top drive nowdays.
I have one on this rig I'm on.
55 posted on 08/25/2004 2:01:22 PM PDT by TexasCowboy