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Drill-string with uncertainty in the bit-rock interaction

Abstract : In this paper a probabilistic model is proposed for the bit-rock interaction model of a drill-string system. A new strategy to take into account uncertainties in a local constitutive nonlinear equation using the nonparametric probabilistic approach is developed. The deterministic model considers the main forces that are applied to the column such as bit-rock interaction, fluid-structure interaction and impact forces. The nonlinear Timoshenko beam theory is applied and the system is discretized by means of the Finite Element Method.
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Submitted on : Tuesday, May 1, 2012 - 2:20:19 PM
Last modification on : Saturday, January 15, 2022 - 4:03:29 AM
Long-term archiving on: : Thursday, August 2, 2012 - 2:21:54 AM


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  • HAL Id : hal-00692829, version 1


T.G. Ritto, Christian Soize, R. Sampaio. Drill-string with uncertainty in the bit-rock interaction. 11th Pan-American Congress of Applied Mechanics - PACAM XI, Jan 2010, Foz do Ignacu, PR, Brazil. pp.1-6. ⟨hal-00692829⟩



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