Study on the Methods for Determining Tooth Orientation of Cone Bit

Abstract

There is an important effect for improving bit drilling performance to adjust tooth orientation of cone bit pertinently. In this paper, to determine tooth orientation reasonably, Tooth coordinate system was established. And a computational method for projecting and decomposing tooth velocity to the axes of tooth coordinate system was presented. Considering the layer condition, the tooth orientation was adjusted and determined. Although the instantaneous cone/bit speed ratio is ambiguity, there is some significance of practical application to use average cone/bit speed ratio when we compute. The methods for determining tooth orientation is easy to apply. It provides a theoretical basis for computing and determining tooth orientation, which has great guiding significance for optimal design of cone bit.