Fracture and wear resistant rock bits

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 10/08 (2006.01) C22C 29/08 (2006.01) E21B 10/50 (2006.01) E21B 10/52 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2413913

A fracture and wear resistant rock bit is disclosed, which includes a bit body, and at least one roller cone disposed on the bit body adapted such that at least one row of cutting elements disposed on the at least one roller cone defines a gage row. At least one cutting element disposed on the gage row has a fracture toughness of at least 20 ksi (in)0.5 and a wear number of at least 1.5.

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