Drilling process and device

Details Drilling process and device Drilling process and device

E - Fixed Constructions

21

B

E21B 6/00 (2006.01)

Patent

CA 2100085

The invention provides a drilling method for drilling a bore-hole in ground or soil, with a percussion drilling device operated directly in the bore-hole and with a rotary percussion drilling device operated from the surface of the ground or soil, both devices being received in a common support member and adapted to be simultaneously operated, and a drilling assembly for performing this method. In order to avoid a damage of the percussion drilling device, the drilling impact force and vibrations directed to the rotary percussion drilling device are registered, elastically dampened and absorbed prior to having an effect on the percussion drilling device.

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