Drilling with Kelly

Classic bored pile system which transfers torque and vertical crowd force to drilling tools via a telescopic kelly bar.
Borehole wall is supported either by excess hydrostatic pressure or by drill casings.
Installation of drill casings by a rotary drive or by casing oscillators attached to the rig.
By using different drilling tools the system can be employed in all types of soil (including bedrock).
Diameters 600 – 3000 mm
Drilling depths from 15 – 90 m