Percussion drilling head

Details Percussion drilling head Percussion drilling head

2006-09-12

2006-09-12

Neuder, William (Department: 3672)

Boring or penetrating the earth

Processes

C175S420200, C175S296000, C175S415000

Reexamination Certificate

active

07104344

ABSTRACT:
Device and method for drilling into geological formations. The device comprises:a rotatable body;drilling cutters arranged on an axial end surface of the rotatable body;a percussion part, which is parallel to the rotating axis reciprocatable arranged on said body; andpercussion cutters arranged on an axial end surface of the percussion part.The method comprises the steps of:bringing a percussion part with a percussive movement in contact with the formation in order to crack at least a part of the formation, andscraping the cracked parts of the formation with a drilling part.

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