文献类型：期刊文献

中文题名：一种新型钻铤接头应力减轻结构的效果分析

英文题名：Analysis of a noval stress relief structure of drill collar joint

作者：任辉[1];高连新[1];鲁喜宁[2]

机构：[1]华东理工大学机械与动力工程学院,上海200237;[2]上海海隆石油管材研究所,上海200949

年份：2011

卷号：33

期号：2

起止页码：128

中文期刊名：石油钻采工艺

外文期刊名：Oil Drilling & Production Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD_E2011_2012】；

基金：上海市科学技术委员会科技特派员项目"石油钻杆接头应力分析及新型接头开发"(编号:09QT1400100)资助

语种：中文

中文关键词：钻铤接头;应力集中;摩擦因数;应力分析;有限元

外文关键词：drill collar joint; concentration of stress; friction coefficient; stress analysis; FEM

摘要：石油钻铤失效事故大多发生在外螺纹接头靠近台肩处的最末啮合扣位置,而疲劳断裂与断裂处的应力水平有很大关系,应力水平越高,越容易发生疲劳断裂。因此,如何减小钻铤接头的局部应力集中、改善应力分布,一直是研究的热点问题。在API应力减轻结构的基础上,设计了一种新型应力减轻结构,并进行了实际应用。在考虑摩擦因数的前提下,利用有限元方法,对该新型结构进行了详细分析,对比了API接头、API应力减轻结构和该新型结构的效果,分析了3种结构在台肩面、螺纹牙上的应力分布以及台肩面上的接触力分布。结果表明,该新型结构可以有效地减小钻铤接头局部应力峰值,改善接头的应力分布,从而为改进钻铤接头设计、提高钻铤寿命提供了参考。
It has been a hot issue of reducing the local stress concentration on the drill collar joint to improve the stress distribution.For the oil-drill collar,the failure often occurred at the root of the last engaged tooth in the pin near the shoulder,and the fatigue fracture was much related to the stress level.The larger the stress,the more easily fatigue fracture occurs.The new designed structure has ac-cessed to the application,which was designed on the base of the stress-reducing structure of API.Detailed analysis was carried out on the new structure using finite element method.The stress distribution on the thread teeth and the contact normal force on the shoulder surface were compared among the API joint,the stress relief structure of API and the new structure.The results indicated that the new structure can effectively reduce the local stress peaks of the drill collar joints and improve the stress distribution,so it could provide reference of designing new drill collar joints and improving drill collar lifetime.