钻柱失效机理分析  

Failure Mechanism of Drill Strings

作　　者：楼一珊[1] 蒋小莺[1] 朱江[1] 吴田忠[2] 杜燕[2] 向绪金[2] 

机构地区：[1]江汉石油学院石油工程系,湖北荆州434102 [2]中原油田分公司,河南濮阳457001

出　　处：《江汉石油学院学报》2001年第2期1-2,共2页Journal of Jianghan Petroleum Institute

摘　　要：阐明了定向钻井过程中 ,钻柱由于弯曲交变循环应力而造成的疲劳损伤是可以积累的 ,钻柱的寿命与疲劳损伤积累有关。对钻柱进行了动载力学分析和疲劳寿命预测 ,提出了相应的计算模型 ,可以计算钻柱组合中任意钻柱单元在钻井过程中所受的疲劳损伤 ,预测使用寿命。It is presented that during a directional well drilling, drill string is subject to fatigue damage because of alternating bending cyclic stress ,from which the damage may be accumulated and its fatigue life is related with the accumulation of fatigue damage A mechanic analysis of dynamic loading and a prediction of fatigue life are conducted on the drill string,a corresponding calculation model is established and a software is developed for the calculating program By using a software,the calculation of fatigue damage and prediction of its service life are performed for random drill string unit in the string assembly In contrast with the diagram recommended in API,the software's precision is improved, which is great valuable for reasonable application and monitoring of the drill strings and prevention of their failures

关 键 词：钻柱 损坏 失效机理 寿命 石油钻井 定向钻井 

分 类 号：TE22[石油与天然气工程—油气井工程]