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Self-excitation of deep-well drill string torsional vibrations
Strength of Materials, 2009We address a problem of self-excitation of elastic torsional vibrations of a rotating drill string due to frictional interaction between the drill bit and rock at the deep well bottom. Using the d’Alembert solution to a wave equation, a mathematical model is constructed for a wave torsional pendulum in the form of a nonlinear ordinary differential ...
V. I. Gulyaev +2 more
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Unveiling complexity of drill–string vibrations: Experiments and modelling
International Journal of Mechanical Sciences, 2015Abstract We investigate complex drill–string dynamics on a novel experimental rig [1] , capable of reproducing all major types of drill–string vibrations. One of the most important features of this versatile experimental rig is the fact that commercial drill–bits and rock-samples are used.
Marcin Kapitaniak +4 more
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Torsional Vibration of Drill String Induced by Heave Motion in Deepwater Drilling
Journal of Offshore Mechanics and Arctic EngineeringAbstract Understanding drill string dynamics is essential to improving drilling efficiency and preventing accidents. Previous studies have mainly focused on self-excited oscillations due to stick–slip and bit-bounce. However, in deepwater drilling, large weight-on-bit (WOB) fluctuations due to heave motion are a significant concern that ...
Tatsuya Kaneko +4 more
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Active control of a drill string vibration load
Automation, Telemechanization and Communication in Oil Industry, 2021V.V. Bogachev +2 more
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Drill String Vibration Monitoring as an Element of Automatic Control of Drilling
Proceedings of the 5th Workshop for Young Scientists in Computer Science and Software Engineering, 2022Vladimir Morkun +5 more
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