机电工程技术2024，Vol.53Issue(2)：69-74,6.DOI:10.3969/j.issn.1009-9492.2024.02.015
球面-锥面特殊螺纹接头密封面能量耗散及密封性分析
Analysis of Energy Dissipation and Sealing Performance of Spherical-cone Premium Connection
摘要
Abstract
In order to study the effect of different downhole working conditions on the sealing surface of spherical-cone premium connection from the angle of energy dissipation,a sphere-plane contact model is established for the sealing surface of spherical-cone premium connection by using ABAQUS finite element software,and the changing law of load-displacement hysteresis curve under different tangential displacement load,different pressure and different friction coefficient is obtained.The area change of the hysteresis curve reflects the law of energy dissipation.The sealing performance of premium connection are evaluated by using the sealing contact strength theory.The results show that the larger the friction coefficient is,the larger the macroslip load by the load-displacement hysteresis backbone curve;with the increase of load,the sealing surface showed stiffness softening phenomenon.The energy dissipation value of the contact area increases with the increase of tangential displacement load,pressure and friction coefficient in both partial and complete slip states,indicating that the sealing performance decreases.According to the sealing strength theory,the sealing surface meets the sealing requirements when the pressure is 15～40 MPa;with the increase of pressure,the sealing contact strength increases and the sealing performance also improves.The study results provides reference value for improving sealing performance of spherical-cone premium connection under complex working conditions.关键词
特殊螺纹接头/能量耗散/球面-锥面/密封性能/有限元Key words
premium connection/energy dissipation/spherical-cone/sealing performance/finite element分类
能源科技引用本文复制引用
秦彦斌,李俊城,于洋,曹银萍,窦益华..球面-锥面特殊螺纹接头密封面能量耗散及密封性分析[J].机电工程技术,2024,53(2):69-74,6.基金项目
国家自然科学基金资助项目(52274006) （52274006）
