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Drill string nonlinear vibrations: Experimental studies and finite-element analysis
(
Institute of Physics Publishing
, 2018 , Conference Paper)
In the present work, nonlinear vibrations of drill strings are studied. A laboratory scale arrangement consisting of a flexible rod with rotor-stator system is used to study the system dynamics. A finite-element model has ...
Nonlinear stochastic drillstrings vibrations: Parametric study for stick-slip suppression
(
Institute of Physics Publishing
, 2018 , Conference Paper)
Unstable vibrations caused by the transition between static and kinetic frictions produces stick-slip motions which is one of the primary causes of poor drilling efficiency and mechanism failure in the drilling process. ...