Rotationally indexable cutting elements and drill bits therefor

Details Rotationally indexable cutting elements and drill bits therefor Rotationally indexable cutting elements and drill bits therefor

E - Fixed Constructions

21

B

E21B 10/633 (2006.01) E21B 10/42 (2006.01)

Patent

CA 2693726

A cutting element (40, 140, 240) for use with a drill bit (10, 110, 210) includes a substrate (42, 142, 242) having a longitudinal axis (50, 150, 250), a lat-eral surface (52, 152, 242) substantially symmetric about the longitudinal axis and one or more key elements (54, 154, 254) coupled to the lateral surface (52, 152, 242). The lateral surface (52, 152, 242) lies between an inser-tion end (56, 156, 256) and a cutting end (58, 158) of the substrate (42, 142, 242). The one or more key elements (54, 154, 254) are substantially axially aligned with the longitudinal axis (50) and configured to selectively rota-tionally locate the substrate in a pocket (41, 141, 241). A drill bit (10, 110, 210) configured for retaining a cutting element 40, 140, 240 having one or more key elements (54, 154, 254) is also disclosed.

L'invention concerne un élément de coupe (40, 140, 240) à utiliser avec un trépan (10, 110, 210) qui comprend un substrat (42, 142, 242) ayant un axe longitudinal (50, 150, 250), une surface latérale (52, 152, 242) sensiblement symétrique autour de l'axe longitudinal et un ou plusieurs éléments de clé (54, 154, 254) couplés à la surface latérale (52, 152, 242). La surface latérale (52, 152, 242) repose entre une extrémité d'insertion (56, 156, 256) et une extrémité de coupe (58, 158) du substrat (42, 142, 242). Le ou les éléments de clé (54, 154, 254) sont alignés de manière sensiblement axiale avec l'axe longitudinal (50) et configurés pour localiser sélectivement en rotation le substrat dans une poche (41, 141, 241). Un trépan (10, 110, 210) configuré pour retenir un élément de coupe (40, 140, 240) ayant un ou plusieurs éléments de clé (54, 154, 254) est également proposé.

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