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Journal articles
Stochastic dynamics of a drill-string with uncertain weight-on-hook
Abstract : A drill-string is a slender structure that turns and drills into the rock in search of oil. There are many sources of uncertainties in this complex dynamical system. However, this article is concerned only with uncertainties in the weight-on-hook, which is the supporting force exerted by the hook at the top. A probabilistic model is constructed for the random variable related to the weight-on-hook using the Maximum Entropy Principle, and the random response of the system is computed through Monte Carlo simulations. The idea is to understand how the performance of the system (which is measured by the rate of penetration) is affected by the uncertainties of the weight-on-hook. The continuous system analyzed is discretized by means of the Finite Element Method and a computer code is developed to do the simulations.
Cited literature [22 references]
https://hal-upec-upem.archives-ouvertes.fr/hal-00684313
Contributor : Christian Soize <>
Submitted on : Sunday, April 1, 2012 - 1:54:51 PM
Last modification on : Wednesday, February 17, 2021 - 10:42:04 AM
Long-term archiving on: : Monday, July 2, 2012 - 2:59:24 AM
Contributor : Christian Soize <>
Submitted on : Sunday, April 1, 2012 - 1:54:51 PM
Last modification on : Wednesday, February 17, 2021 - 10:42:04 AM
Long-term archiving on: : Monday, July 2, 2012 - 2:59:24 AM
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