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Benchmarking of Industrial Stick-Slip Mitigation Controllers

Abstract : The present paper evaluates how three different top-drive feedback controllers influence the occurrence of a stick-slip limit cycle in a rotating drill string. The considered controllers are: 1) The industry standard stiff, high-gain controller, 2) SoftTorque, and, 3) ZTorque. The evaluation is performed as a simulation study on a distributed model of a drill string with a collar section and Coulomb friction as a distributed source term. This model is capable of replicating stick-slip oscillations as caused by the reduction in friction from static to dynamic, and have been shown to yield a good match with field data. The simulation study is summarized as a map for each controller indicating the existence and amplitude of oscillations, parametrized in the key friction parameters.
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Contributor : François Chaplais Connect in order to contact the contributor
Submitted on : Wednesday, January 8, 2020 - 2:36:08 PM
Last modification on : Wednesday, November 17, 2021 - 12:31:08 PM

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Ulf Jakob F. Aarsnes, Florent Di Meglio, Roman Shor. Benchmarking of Industrial Stick-Slip Mitigation Controllers. Automatic Control in Offshore Oil and Gas Production - 3rd OOGP 2018, May 2018, Esbjerg, Denmark. pp.233-238, ⟨10.1016/j.ifacol.2018.06.382⟩. ⟨hal-02432471⟩



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