Patent ID: 6615935
Filing Date: 2003-09-09
Classification: B22F,C22C,E21B

Abstract:
A rotary cone bit comprising:a steel bit body comprising at least one leg extending therefrom; a steel cone rotatably disposed on the leg, the cone comprising a plurality of steel cutting elements projecting outwardly therefrom; wherein a portion of the cone has a wear resistant surface formed from a wear resistant composite material made by the process of: combining powders selected from the group consisting of carbides, borides, nitrides, carbonitrides, refractory metals, cermets, Co, Fe, Ni, steel, and combinations thereof, to form a material mixture; applying the material mixture onto a surface of the cone when the cone is in a pre-existing rigid state; and pressurizing the applied mixture under conditions of elevated temperature to form the wear resistant surface.