A rock drill bit and cutting inserts

Details A rock drill bit and cutting inserts A rock drill bit and cutting inserts

E - Fixed Constructions

21

B

E21B 10/56 (2006.01) E21B 10/46 (2006.01)

Patent

CA 2199039

The present invention relates to a cutting insert for a rock drill bit. The rock drill bit includes a tool body (10) having a front surface (13), and a number of cutting inserts (14), each having a generally cylindrical shank portion. The cutting insert (14) is provided with increased volume portions in its parts being most subjected to wear. The invention also relates to the rock drill bit.

Elément de coupe rapporté pour fleuret de perforatrice. Ledit fleuret de perforatrice comprend un corps (10) pourvu d'une surface avant (13) et d'un certain nombre d'éléments de coupe rapportés (14), chacun ayant une partie tronc généralement cylindrique. L'élément de coupe rapporté (14) est doté de parties à volume accru dans ses zones les plus soumises à l'usure. La présente invention concerne également le fleuret de perforatrice.

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