We investigate complex drill–string dynamics on a novel experimental rig [1], capable of
reproducing all major types of drill–string vibrations. One of the most important features of …

The drill-string dynamics is difficult to predict due to the non-linearities and uncertainties
involved in the problem. In this paper a stochastic computational model is proposed to …

This paper extends the analysis of the self-excitated vibrations of a drilling structure
presented in an earlier paper [T. Richard, C. Germay, E. Detournay, A simplified model to …

Stick-slip and bit-bounce are dangerous dynamic phenomena encountered during rotary
drilling of oil-wells, but their exact origins and interplay are far from obvious. In this paper, we …

Oil drilling operations is usually associated with drill-string severe vibration conditions that
lead to an onerous and inefficient process. In order to avoid or minimize the impact of …

Rotary drilling systems equipped with drag bits or fixed cutter bits (also called PDC), used for
drilling deep boreholes for the production and the exploration of oil and natural gas, often …

In this work we investigate forward and backward whirls of a drill-string using a novel
experimental drilling rig (Wiercigroch, 2010) capable of reproducing major types of drill …

In this article, reduced-order models of a drill-string system are developed, the predictions of
these models are studied, and qualitative comparisons are made with experimental studies …

Vibrations have been identified as one of the most-frequent and persistent performance
limiters by limiting weight on bit, rate of penetration, or borehole quality even when they may …

We investigate experimentally and numerically suppression of drill-string torsional vibration
while drilling by using a sliding mode control. The experiments are conducted on the novel …