Methods for evaluating roller cone drill bit designs

摘要

A method for evaluating a cutting arrangement for a drill bit includes selecting (107) a cutting element arrangement for the drill bit and calculating (107) 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 bottomhole pattern for the arrangement with a preferred bottomhole pattern. The use of this method can lead to roller cone drill bit designs that exhibit reduced tracking over prior art bits.