Methods for evaluating cutting arrangements for drill bits and their application to roller cone drill bit designs

摘要

A method for evaluating a cutting arrangement for a drill bit includes selecting a cutting element arrangement for the drill bit and calculating a score for the cutting arrangement. This method may be used to evaluate the cutting efficiency of various drill bit designs. In one example, this method is used to calculate a score for an arrangement based on a comparison of an expected bottom hole pattern for the arrangement with a preferred bottom hole pattern. The use of this method has lead to roller cone drill bit designs that exhibit reduce tracking over prior art bits.