Model-based analysis and control of axial and torsional stick-slip oscillations in drilling systems

Bart Besselink, Nathan van de Wouw, Henk Nijmeijer

Research output: Contribution to conferencePaperAcademic

11 Citations (Scopus)

Abstract

The mechanisms leading to torsional vibrations in drilling systems are considered in this paper. Thereto, a drill string model of the axial and torsional dynamics is proposed, where coupling is provided by a rate-independent bit-rock interaction law. Analysis of this model shows that the fast axial dynamics exhibit an axial stick-slip limit cycle. This generates an apparent velocity-weakening effect in the torque-on-bit, explaining the onset of torsional vibrations. Based on this analysis, a strategy for control design aiming at the suppression of torsional vibrations is presented.
Original languageEnglish
Pages495-500
Number of pages6
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event2011 IEEE International Conference on Control Applications (CCA) - Denver, United States
Duration: 28-Sep-201130-Sep-2011

Conference

Conference2011 IEEE International Conference on Control Applications (CCA)
Country/TerritoryUnited States
CityDenver
Period28/09/201130/09/2011

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