井下流量控制阀金属密封接触力学行为的理论与仿真研究  

Theoretical and Simulation Study on Contact Mechanical Behaviorsof Metal Seal of Inflow Control Valve

作　　者：杨仪伟 朱宏武[1] 何东升[2] 郑严[2] 叶哲伟[2] 许亮斌[3] 何玉发 李川 YANG Yiwei;ZHU Hongwu;HE Dongsheng;ZHENG Yan;YE Zhewei;XU Liangbin;HE Yufa;LI Chuan(College of Mechanical and Transportation Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Electro-mechanic Engineering College,Southwest Petroleum University,Chengdu Sichuan 610500,China;Research Institute of China National Offshore Oil Corporation,Beijing 100027,China)

机构地区：[1]中国石油大学(北京)机械与储运学院,北京102249 [2]西南石油大学机电工程学院,四川成都610500 [3]中海油研究总院有限责任公司,北京100027

出　　处：《润滑与密封》2020年第11期15-21,共7页Lubrication Engineering

基　　金：“十三五”国家科技重大专项(2016ZX05028001-007).

摘　　要：智能井井下流量控制阀(ICV)的金属密封旨在隔离油套管环空的原油流动,其接触力学行为对井下流量控制阀的结构设计和可靠性至关重要。推导金属密封接触应力与其自变量之间的相关理论模型,并利用有限元法研究并验证了金属密封接触应力与其自变量之间的理论关系。为表征密封应力,将金属密封组件与滑套的二维轴对称模型抽象为悬臂梁模型。研究发现:接触应力的理论解和数值解与工作压力、悬臂梁长度、悬臂梁截面高度和悬臂梁端面的水平位移成正比,而与悬臂梁倾角的正弦值和密封面的宽度成反比。各自变量引起的接触应力的理论解和数值解之间的平均相对误差均不大于10%,验证了提出的理论模型是正确的。该模型可为已知油田条件下的金属密封设计提供依据。The metal seal of an inflow control valve(ICV) is intended to isolate the oil and gas between the casing annulus and the well tubing,and the contact mechanical behavior of the metal seal assembly is essential to the structural design and reliability of ICVs in intelligent well.The related theoretical model between the metal seal’s contact stress and its independent variables was derived.The relationship between the contact stress of the metal seal and its independent variable was studied and verified by the finite element method(FEM).To characterize the sealing mechanism,a two-dimensional axisymmetric model of the metal seal and the sleeve was abstracted as a cantilever beam model.The results indicate that the contact stress by theoretical and numerical solutions is in direct proportion to the working pressure,the cantilever beam length,the cross-section height of the cantilever beam and the cantilever beam’s horizontal displacement of the end face,but in inverse proportion to the sine value of the cantilever beam inclination angle and the of the seal face width.The average relative error between the theoretical and numerical solutions of contact stress caused by each variable is less than 10%,which verifies that the theoretical model is correct.The proposed theoretical model provides the foundations for the design of metal seal assembly under a known oilfield conditions.

关 键 词：智能井 井下流量控制阀 金属密封 接触力学行为 

分 类 号：TB42[一般工业技术]