A rock drill bit assembly

Details A rock drill bit assembly A rock drill bit assembly

E - Fixed Constructions

21

B

E21B 10/28 (2006.01) E21B 7/28 (2006.01) E21D 9/10 (2006.01)

Patent

CA 2522572

A drill bit assembly for direct removal of rock by means of a rotatable bit assembly (5) that includes a plurality of cutters or choppers (7). According to the invention, a number of cutters (7) are so disposed in relation to each other on the bit assembly (5) that a subsequent cutter (7b), seen in the direction of rotation, will engage an edge created by the action of a preceding cutter (7a).

L'invention concerne un ensemble taillant de fleuret permettant d'extraire directement la roche au moyen d'un ensemble trépan rotatif (5) comprenant une pluralité de tranchets ou hacheurs (7). Selon l'invention, plusieurs tranchets (7) sont disposés les uns par rapport aux autres sur l'ensemble trépan (5), de sorte qu'un tranchet (7b) vient en contact, dans le sens de rotation, avec un bord formé par l'action du tranchet précédent (7a).

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