Nonlinear vibration analysis of directional drill string considering effect of drilling mud and weight on bit

Journal of Vibroengineering

Esmaeil Abedi¹  Saeed Daneshmand¹  Vahid Monfared²  Farshad Taheran³ 

[1] Department of Mechanical Engineering, Majlesi Branch, Islamic Azad University, Isfahan, Iran;Department of Mechanical Engineering, Zanjan Branch, Islamic Azad University, Zanjan, Iran;School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran;

关键词: coupled nonlinear vibration;    stability;    drill string;    drilling mud;   

DOI  :  

来源: DOAJ

【 摘 要 】

In this paper a nonlinear dynamic model for drill string in inclined well drilling is developed. Effects of drilling mud flow rate, weight on bit, angular velocity along with viscous damping on stability and vibration of the drill string are studied. Findings indicate the nonlinear effects are significant on the results. The effects of drilling mud flow rate and weight on bit on the natural frequencies and time responses are evaluated. Enhancement of drilling mud flow rate results in decreasing of natural frequencies and vibrational amplitude, while increasing the weight on bit, leads to decrease of the natural frequencies and increase the vibrational amplitude.

【 授权许可】

Unknown