下部钻柱反向涡动机理研究  

Research on Backward Whirling Mechanism of Bottom Drillstring

作　　者：史玉才[1] 王军 朱江[3] 管志川[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东东营257061 [2]长庆油田分公司国际事业部,陕西西安710021 [3]中国石化西南工程湖南钻井分公司,新疆轮台841600

出　　处：《石油钻探技术》2007年第5期43-45,共3页Petroleum Drilling Techniques

基　　金："十五"国家科技攻关计划"中国油气资源发展关键技术研究"项目之"复杂油气藏配套钻井技术及关键装备研究"课题(编号:2001BA605A-13);"十一五"国家高技术研究发展计划(863计划)资源环境技术领域"先进技术与装备重大项目"之"超深井钻井技术"课题(编号:2006AA06A109)资助

摘　　要：钻井过程中,下部钻柱通常处于反向涡动状态,易造成钻具和钻头的损坏。因此,分析研究下部钻柱的涡动机理十分必要。考虑下部钻柱与井壁之间的碰摩作用,应用转子动力学理论建立了下部钻柱的反向涡动机理分析模型,探讨了下部钻柱反向涡动的原因和形成条件,以及下部钻柱反向涡动频率与自转频率的关系等,并利用室内模拟试验验证了下部钻柱反向涡动的机理及规律。Bottom drillstring is often in backward whirling during drilling operations, which cause drill tools and hits to be damaged. Therefore, it is necessary to investigate the whirling mechanism. Considering the frication between the bottom drillstring and wellbore, a theoretieal baekward whirling model of bottom drillstring was derived using the theory of rotor dynamics. The reasons and eonditions for baekward whirling, the relationship between the frequeney of baekward whirling of bottom drillstring and its rotation frequency were investigated. The backward whirling meehanism of bottom drillstring was verified by simula- ted experiments.

关 键 词：底部钻柱 反向涡动 动力学 钻压 转速 实验室试验 

分 类 号：TE21[石油与天然气工程—油气井工程]