Flydrill Kelly-Pile-Top Drilling Unit

The Flydrill system is a new concept for the construction of bored piles by the rotary drilling technique. The drill, which comprises a rotary drive, kelly bar, drilling tool, and hydraulic clamping unit, is suspended on the main hoist rope of the base carrier (MC foundation crane or similar crawler crane). Hydraulic power supply for the pile-top drilling unit is provided either by the base carrier or an external Bauer hydraulic power pack.

During the drilling process, the drilling unit is clamped to the top of the tubular pile or drill casing by way of a hydraulically operated clamping unit. To empty the drilling bucket and dump the drill spoil on site, the hydraulic clamps are released from the top of the pile, allowing the entire unit to be lifted off and swung sideways.