Cutting element

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 10/56 (2006.01) B22F 5/00 (2006.01)

Patent

CA 2516211

A tool component, which is typically a cutting element or a gauge stone in a rotary drill bit, comprises a layer of ultra-hard abrasive material bonded to a substrate, the layer of ultra-hard abrasive material comprising a pair of opposed end surfaces, an upper surface defined between the end surfaces, and at least one curved and tapered cutting edge defined at the intersection of the respective end surfaces and the upper surface. The respective cutting edges of the tool component and the respective end surfaces leading to the cutting edges are generally wedge-shaped, the upper surface of the layer following generally the same or a similar profile, at least in the region of the cutting edges.

L'invention concerne une pièce d'outil laquelle est typiquement un élément coupant ou une pierre jauge dans un trépan rotatif, comprenant une couche de matériau abrasif ultra dur lié à un substrat, la couche de matériau abrasif ultra dur comprenant une paire de surfaces terminales opposées, une surface supérieure définie entre les surfaces terminales, ainsi qu'au moins un bord coupant incurvé et conique défini au niveau de l'intersection des surfaces terminales respectives et de la surface supérieure. Les bords coupants respectifs de la pièce d'outil ainsi que les surfaces terminales respectives menant aux bords coupants ont la forme générale d'un coin, la surface supérieure de la couche suivant d'une manière générale le même profil ou un profil similaire, au moins dans la région des bords coupants.

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