Cutter element with non-rectilinear crest

Details Cutter element with non-rectilinear crest Cutter element with non-rectilinear crest

E - Fixed Constructions

21

B

E21B 10/12 (2006.01) E21B 10/16 (2006.01) E21B 10/52 (2006.01)

Patent

CA 2246511

A cutter element for a drill bit. The cutter element has a non-rectilinear crest. The non-rectilinear or curvilinear crest provides an advantageous distribution of the cutting forces across the body of the cutter elements and thus improves bit life. The curvilinear crest also allows the cutter element to more efficiently lift the portion of the formation that is being cut, thereby improving cutting action in certain formations. The cutter elements can have either positive or non-positive draft and can be tungsten carbide inserts.

La présente invention a pour objet des taillants pour trépan de forage. Les taillants en question comportent une arête non rectiligne. L'arête non rectiligne ou curviligne offre l'avantage d'une meilleure distribution des forces de coupe et accroît la durée de vie utile du trépan. L'arête de forme curviligne permet en outre un soulèvent plus efficace des formations de matières retirées du fond du trou de forage, ce qui permet d'améliorer le rendement dans certains types de formations. Les taillants en question peuvent comporter une dépouille positive ou nulle et prendre la forme de plaquettes en carbure de tungstène.

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