钻井用浮箍结构冲蚀安全优化数值模拟研究  

Numerical Simulation of Erosion Security Optimization of Floating Hoop Structure for Drilling

作　　者：陈新海 豆惠萍 王乐顶 李立昌 李毅 王锐 杨恺 CHEN Xinhai;DOU Huiping;WANG Leding;LI Lichang;LI Yi;WANG Rui;YANG Kai(Bohai Drilling Engineering Technology Research Institute,Tianjin 300457,China;Exploration and Development Research Institute of PetroChina Huabei Oilfield Company,Cangzhou 062552,China;Bohai Drilling Engineering Downhole Technology Service Branch,Tianjin 300283,China)

机构地区：[1]渤海钻探工程技术研究院,天津300457 [2]中国石油华北油田勘探开发研究院,河北沧州062552 [3]渤海钻探井下技术服务分公司,天津300283

出　　处：《安全与环境工程》2019年第1期170-176,共7页Safety and Environmental Engineering

基　　金：国家科技重大专项项目(2016ZX05022004);中国石油天然气股份有限公司重大科技专项项目(2017E-1511)

摘　　要：针对固井过程中套管用浮箍、浮鞋等附件频频发生失效事故,开展固井浮箍、浮鞋冲蚀优化的数值模拟研究。通过建立浮箍流场CFD有限元模型,定量模拟研究不同阀芯开度下含有固相颗粒的多相流对浮箍阀体的冲蚀速率,建立了冲蚀速率与固相颗粒含量、固相颗粒大小、阀芯开启度的关系曲线。结果表明:弹簧式浮箍在开启高度L大于或等于40mm,舌板式浮箍在阀板开启角度大于50°时,能使其冲蚀速率显著减小。To deal with the frequent failure accident of casing string floating hoops in cementing operations,this paper carries out the numerical simulation of the erosion optimization of floating hoops and shoes.By building the finite element model of CFD flow field,the paper quantatively simulates the erosion of floating hoop by multiphase flow containing solid phase particles under the different valve core opening,and establishes the relation curves of erosion rate with solid particle content,solid particle size and opening degree of valve core.The results show that when the open height L of the spring floating hoop is larger or equal to 40mm and the opening angle of tongue floating hoop is larger or equal to 50°,the erosion rate can be significantly reduced.

关 键 词：固井 浮箍 冲蚀 安全优化 数值模拟 

分 类 号：X936[环境科学与工程—安全科学] TE925.1[石油与天然气工程—石油机械设备]