Patent ID: 7624823
Filing Date: 2009-12-01
Classification: E21B

Abstract:
1. A roller cone drill bit comprising: a bit body having at least one support arm extending therefrom; a respective cone assembly rotatably mounted on each support arm for engagement with a subterranean formation to form a wellbore; each cone assembly having a respective axis of rotation extending from the associated support arm; each cone assembly having at least two rows of cutting elements; each cutting element including a hardfacing material having a thickness, the thickness and a location of the hardfacing material on each respective cutting element designed based on a stress zone and a wear zone determined by simulated interaction of the respective cutting element and portions of the subterranean formation; and each cutting element designed with a respective cutting zone and a respective loading zone at optimum locations for the respective cutting element based on the location of the respective cutting element on the respective cone assembly and simulated interaction of the respective cutting element and portions of the subterranean formation.