In drilling operations, the interaction of the drillstring with the borehole leads to vibrations
affecting the performance and increasing the drilling cost. The development of controllers to …

Improved drilling performance enables us to drill a high quality well at less cost per foot in
the lowest time possible. Drillstring vibration is one of the limiting factors maximizing drilling …

Suppressing torsional vibration of drill-string has great safety and economic importance to
drilling process. Note that most existing control methods only measure surface information …

Vibrations in mechanical systems are oscillations occurring without being intentionally
provoked. They often have detrimental effects on the system performance and may cause …

In this article, we propose control solutions to suppress undesirable torsional oscillations of
the drill string in oil well drilling systems. Two feedback control laws are derived from Partial …

This paper proposes feedback control strategies for the mitigation of torsional stick-slip
oscillations in drilling systems using drag bits. Herein, we employ a model for the coupled …

The cyclic nature of the stick–slip phenomenon may cause catastrophic failures in drill-
strings or at the very least could lead to the wear of expensive equipment. Therefore, it is …

This paper presents development of a novel control scheme for suppressing stick–slip
oscillations of drill-strings. This scheme utilises a Modified Integral Resonant Control (MIRC) …

This paper studies the problems of stick-slip mitigation and speed tuning for a lumped-
parameter drill-string system by using a proportional-derivative feedback controller via path …

Stick-slip vibrations decrease the performance, reliability, and fail safety of drilling systems.
The aim of this paper is to design a robust output-feedback control approach to eliminate …