Cutter element with expanded crest geometry

Details Cutter element with expanded crest geometry Cutter element with expanded crest geometry

E - Fixed Constructions

21

B

E21B 10/08 (2006.01) B23P 15/28 (2006.01) E21B 10/16 (2006.01) E21B 10/52 (2006.01)

Patent

CA 2246466

A cutter element for a drill bit. The cutter element has a base portion and an extending portion and the extending portion has either a zero draft or a negative draft with respect to the base portion. The non-positive draft allows more of the borehole bottom to be scraped using fewer cutter elements. The cutter elements having non-positive draft can be either tungsten carbide inserts or steel teeth.

La présente invention a pour objet des taillants pour trépan de forage. Les taillants en question comportent une base et une arête en prolongement présentant une dépouille nulle ou négative par rapport à la base. La dépouille nulle des taillants permet le grattage d'une plus grande surface du fond du trou de forage et le recours à un moins grand nombre d'outils. Les taillants à dépouille nulle peuvent être sous forme de plaquettes rapportées en carbure de tungstène ou de dents en acier.

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