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Article Dans Une Revue Mechanical Systems and Signal Processing Année : 2018

Hysteretic bit/rock interaction model to analyze the torsional dynamics of a drill string

Résumé

The present paper proposes a novel hysteretic (non-reversible) bit/rock interaction model for the torsional dynamics of a drill string. Non-reversible means that the torque-on-bit depends not only on the bit speed, but also on the bit acceleration, producing a type of hys-teretic cycle. The continuous drill string system is discretized by means of the finite element method and a reduced-order model is constructed using the normal modes of the associated conservative system. The parameters of the proposed hysteretic bit/rock interaction model is fitted with field data. The non-linear torsional vibration and the stability map of the drill string system are analyzed employing the proposed bit/rock interaction model and also a commonly used reversible model (without hysteresis). It turns out that the hysteretic model affects the stability region of the system.
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Dates et versions

hal-01952960 , version 1 (02-01-2019)

Identifiants

Citer

F. F. Real, A. Batou, T.G. Ritto, C. Desceliers, R. R. Aguiar. Hysteretic bit/rock interaction model to analyze the torsional dynamics of a drill string. Mechanical Systems and Signal Processing, 2018, 111, pp.222-233. ⟨10.1016/j.ymssp.2018.04.014⟩. ⟨hal-01952960⟩
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