中国石油大学学报（自然科学版）2018，Vol.42Issue(2)：79-86,8.DOI:10.3969/j.issn.1673-5005.2018.02.009
大斜度井眼中钻柱运动特性模拟试验
Experimental study of dynamic characteristics of drillstring in highly deviated well
摘要
Abstract
In order to investigate the dynamic characteristics of drillstring in highly deviated wells,a drillstring dynamics simu-lation equipment was built based on the similarity theory. The actual trajectory of the drillstring movement in the simulated wellbore was plotted based on the experimental results,and the dynamic characteristics of the drillstring were quantitatively e-valuated in terms of lateral vibration,acceleration and trajectory offset. The results indicate that the rotary speed of the drill-string is the dominating factor for its dynamic characteristics. When the rotary speed is low,the lateral vibration frequency is e-qual to the rotation frequency of the drillstring and the average acceleration increases linearly. When the rotary speed is high, the lateral vibration frequency doubles and a rapid increase of the average acceleration can occur. In addition,weight on bit has no significant influence on the dynamic characteristics of the drillstring. Moreover,with the increase of the inclination angle of the wellbore,the vibration amplitude and frequency of the drillstring can remain stable,whereas its trajectory offset increases. In order to avoid severe vibration,the rotary speed should be less than 69.4 r/min during drilling operations.关键词
钻井/大斜度井/钻柱运动特性/横向振动/加速度/偏移量Key words
drilling/highly deviated well/drillstring dynamic characteristic/lateral vibration/acceleration/trajectory offset分类
能源科技引用本文复制引用
温欣,管志川,邵冬冬,周英操..大斜度井眼中钻柱运动特性模拟试验[J].中国石油大学学报（自然科学版）,2018,42(2):79-86,8.基金项目
国家"973"发展计划项目(2015CB251206) （2015CB251206）
"十三五"国家科技重大专项(2016ZX05022-002) （2016ZX05022-002）
