Self-Excited Vibrations of Drillstrings

钻柱自激振动

• 批准号: 9118421
• 负责人: Donald Dareing
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-01 至 1992-08-15
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9118421&HistoricalAwards=false
• 关键词: Self; Excited; Vibrations; Drillstrings

The objective of the proposed analytical research is to develop a technical basis for predicting the limit of dynamic stability of drill bits used in various earth boring operations. The investigation will incorporate the combined effects of axial, torsional and lateral modes in the analysis of bit motion and in the determination of the limit of dynamic stability. A study of the effects of mode coupling will show which modes of vibration are critical and lead to practical methods of changing the structural stability of the drilling system. The knowledge gained from this research will provide a technical guidance for reducing drillstring failures and increasing penetration rate.

拟议的分析研究的目的是为预测各种地球钻孔操作中使用的钻头动态稳定性的限制开发技术基础。该研究将纳入轴向，扭转和横向模式的综合效应，并在确定动态稳定性极限的分析中。对模式耦合效应的研究将表明哪种振动模式至关重要，并导致改变钻孔系统结构稳定性的实际方法。从这项研究中获得的知识将为减少钻孔失败和提高渗透率提供技术指导。