Extends stabilizing jackscrews to support and level drilling rig.
Moves levers to control power-driven winch that raises and extends telescoping mast.
Bolts trusses and guy wires to raised mast and anchors them to machine frame and stakes. Assembles drilling tools, using hand tools or power tools. Moves levers and pedals and turns handwells to control reciprocating action of machine and to drive or extract well casing. Pumps water into well to facilitate drilling by cooling drill bit and removing drillings. Listens to sounds of drilling machine and feels cable or brake to determine drilling conditions and to identify variations such as entering new strata or striking rock.