深水无隔水管钻井钻柱三维振动疲劳寿命分析  

Three Dimensional Vibration Fatigue Life Analysis of Drill String in Deepwater Riserless Drilling

作　　者：李炎军 管申 徐一龙 杜威 LI Yanjun;GUAN Shen;XU Yilong;DU Wei(Zhanjiang Branch of Cnooc(China)Ltd.,Zhanjiang Guangdong 524057)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《河南科技》2021年第20期30-32,共3页Henan Science and Technology

基　　金：国家自然科学基金面上项目“深水无隔水管钻井钻柱纵-横-扭耦合非线性振动特性研究”(51875489);国家重点研发计划课题“双层连续管双梯度钻井工艺及应用研究”(2018YFC0310205)。

摘　　要：针对深水无隔水管钻井钻柱振动疲劳寿命问题,建立深水无隔水管钻井钻柱三维振动方程,基于Miner线性累积损伤理论,结合钻柱振动应力响应和S-N曲线,形成深水无隔水管钻井钻柱振动疲劳寿命分析方法,分析了钻柱的三维振动疲劳寿命。结果表明:钻柱扭转振动疲劳寿命随着波动钻压值的增大而减小,随着转速的增加而增加。Aiming at the problem of vibration fatigue life of riserless drill string in deepwater,the three-dimensional vibration equation of riserless drill string in deepwater is established.Based on Miner’s linear cumulative damage theory,combined with drill string vibration stress response and S-N curve,the vibration fatigue life analysis method of riserless drill string in deepwater is formed,and the three-dimensional vibration fatigue life of drill string is analyzed.The results show that the torsional vibration fatigue life of drill string decreases with the increase of fluctuating WOB value and increases with the increase of rotating speed.

关 键 词：无隔水管 钻柱系统 振动疲劳 S-N曲线 Miner理论 

分 类 号：TE921[石油与天然气工程—石油机械设备]