Title :
Simple model of whirl
Author :
Kovalyshen, Yevhen
Author_Institution :
Earth Sci. & Resource Eng., Drilling Mech. Group, CSIRO, Kensington, WA, Australia
Abstract :
A simple analytical model of bit whirl is presented. The model takes into account the history-dependent boundary conditions at the bit-rock interface. We show that the geometry of the bit can be lumped into only three parameters. Depending on the value of these parameters the system can be stable or undergo forward or backward whirl.
Keywords :
drilling (geotechnical); geometry; mechanical stability; rocks; vibrations; backward whirl; bit geometry; bit whirl; bit-rock interface; forward whirl; history dependent boundary conditions; Asymptotic stability; Blades; Equations; Force; Geometry; Mathematical model; Stability analysis;
Conference_Titel :
Control Applications (CCA), 2011 IEEE International Conference on
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4577-1062-9
Electronic_ISBN :
978-1-4577-1061-2
DOI :
10.1109/CCA.2011.6044459
