E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/00 (2006.01) E21B 10/40 (2006.01)
Patent
CA 2460069
The invention relates to a device for drilling into geological formations, which 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; and - percussion cutters arranged on an axial end surface of the percussion part. The invention further relates to a method for drilling into geological formations, which 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, and scraping the cracked parts of the formation with a drilling part.
L'invention concerne un dispositif permettant de forer des formations géologiques. Ledit dispositif comprend un corps rotatif, des lames de forage disposées sur une surface d'extrémité axiale dudit corps, un élément de percussion parallèle à l'axe de rotation situé sur ledit corps de manière à réaliser un mouvement de va-et-vient, et des lames de percussions disposées sur une surface d'extrémité axiale de l'élément de percussion. Cette invention a également trait à un procédé servant à forer des formations géologiques. Ce procédé consiste à amener un élément de percussion, au moyen d'un mouvement de percussion, en contact avec la formation pour la fissurer au moins partiellement, et à gratter les parties fissurées de ladite formation avec un élément de forage.
Kriesels Petrus Cornelis
Zijsling Djurre Hans
Shell Canada Limited
Smart & Biggar
LandOfFree
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