摘要
根据小井眼钻具细、刚度低的特点，充分考虑钻具与井壁的接触碰撞，分别建立了小井眼直井钻具性能评估准则和钻柱动强度条件．通过钻具性能分析，设计了两种防斜钻具，使平均机械钻速由１２５ｍ／ｈ提高到２２０ｍ／ｈ．最大井斜角为３５°．动强度分析表明：在稳定工作状态下钻柱最大应力响应值为１５９０６ＭＰａ，小于相应的疲劳极限应力２０６４７ＭＰａ，满足动强度条件．
In view of the slender string and low stiffness of slimholes and fully considering the contact and impact between drill string and bore hole wall, we established the criterion for evaluating the performance and the dynamic strength qualification of the drill string in vertical slimhole wells, which offered theory and method for the performance evaluation and safety evaluation of drill strings in vertical slimhole wells. The performance evaluation criterion and the dynamic strength qualification were proved to be correct and valid and met the engineering requirements.
出处
《大庆石油学院学报》
CAS
北大核心
1999年第1期63-64,共2页
Journal of Daqing Petroleum Institute
基金
中国石油天然气总公司"九五"重点科研项目
关键词
小井眼钻具
钻具
性能评估
强度
计算
钻具
钻井
drill string in slimhole, vertical well, performance evaluation and prediction of drill string, the fatigue strength analysis of drill string
