Proceedings of the Second International Energy 2030 Conference,
November 4-5, 2008, Abu Dhabi, UAE

Reduced-Order Models for Drill-String Dynamics

C. M. Liao
University of Maryland, USA

B. Balachandran
University of Maryland, USA

M. Karkoub
The Petroleum Institute, UAE

Y. L. Abdel-Magid
The Petroleum Institute, UAE

Abstract
A drill sting is a part of the rotary drilling apparatus for constructing a borehole from the earth's surface to an oil/gas reservoir. Reliable models that can be used to predict the motion of a drill string are important to design efficient oil mining operations as well as to mitigate structural failures. The failure of the drill-string system can shutdown the oil production system for time-consuming repairs. With this background, the present effort is aimed at determining reduced-order models for predicting drill-string motions.