Self-shaping drill cutting edge

Details Self-shaping drill cutting edge Self-shaping drill cutting edge

E - Fixed Constructions

21

B

E21B 10/56 (2006.01) E21B 10/00 (2006.01) E21B 10/62 (2006.01)

Patent

CA 2091676

2091676 9205335 PCTABS00110 L'invention concerne un taillant d'outil de forage auto-affûtable en forme de plaquette comprenant une couche extérieure polycristalline diamantée (22) déposée sur une couche en carbure de tungstène (24), chaque taillant étant fixé sur un support (18) solidaire du corps (12) de l'outil. Sur le taillant et/ou sur son support (18) sont formées des zones (26) de moindre résistance, telles que des rainures, qui peuvent initier des cassures successives faisant un angle de dépouille aigu (.alpha.) avec la formation rocheuse à forer (28).

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