Nonlinear dynamic stability analysis of the coupled axial-torsional motion of the rotary drilling considering the effect of axial rigid-body dynamics

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• 作者：F. Bakhtiari-Nejad ; ^{baktiari@aut.ac.ir} ; A. Hosseinzadeh
• 关键词：Drill string ; Vibration ; Stick-slip instability ; Parametric analysis ; Semi-discretization method
• 刊名：International Journal of Non-Linear Mechanics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：88
• 期：Complete
• 页码：85-96
• 全文大小：2112 K
• 卷排序：88

文摘

Nonlinear dynamic stability of rotary drilling system is studied. Dynamic behavior of axial rigid-body motion is included. The effects of nominal rotational speed of the drill string and nominal weight on bit are investigated. It is observed that drilling operation is unstable for speeds lower than a threshold value. The results show that both velocity-weakening friction and regenerative cutting have great effect on stability of the system.