Abstract
Torsional stick-slip vibrations decrease the performance and reliability of drilling systems used for the exploration of energy and mineral resources. In this work, we present the design of a nonlinear observer-based outputfeedback control strategy to eliminate these vibrations. We apply the controller to a drill-string model based on a real-life rig. To facilitate the design and implementation of the controller, we employ model reduction to obtain a low-order approximation of this model. Conditions, guaranteeing asymptotic stability of the desired equilibrium, corresponding to nominal drilling operation, are presented. The proposed control strategy has a significant advantage over existing vibration control systems in current drilling rigs as it only requires surface measurements instead of expensive down-hole measurements and can handle multiple modes of torsional vibration. Case study results using the proposed control strategy show that stick-slip oscillations can indeed be eliminated in realistic drilling scenarios.
| Original language | English |
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| Title of host publication | Proceedings of the 53rd IEEE Conference on Decision and Control, 15-17 December 2014, Los Angeles, California, USA |
| Place of Publication | Piscataway |
| Publisher | Institute of Electrical and Electronics Engineers |
| Pages | 872-877 |
| ISBN (Electronic) | 978-1-4673-6088-3 |
| Publication status | Published - 2014 |
| Event | 53rd IEEE Conference on Decision and Control, CDC 2014 - "J.W. Marriott Hotel", Los Angeles, United States Duration: 15 Dec 2014 → 17 Dec 2014 Conference number: 53 http://cdc2014.ieeecss.org/ |
Conference
| Conference | 53rd IEEE Conference on Decision and Control, CDC 2014 |
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| Abbreviated title | CDC |
| Country/Territory | United States |
| City | Los Angeles |
| Period | 15/12/14 → 17/12/14 |
| Internet address |