西南石油大学学报（自然科学版）2016，Vol.38Issue(5)：179-184,6.DOI:10.11885/j.issn.1674-5086.2014.07.28.01
油套管特殊螺纹球面对锥面密封性能理论分析
Theoretical Analysis of Sphere to Cone Sealing Performance for Tubing and Casing Premium Connection
摘要
Abstract
To study the sphere to cone surfaces sealing structure in tubing and casing premium connection,on the basis of Hertz contact mechanics and considering the sealing surface makeup torque,the sealing contact stress model has been established in this paper. The effects of the spherical radius,elastic modulus of sphere and the sealing surface makeup torque on the sealing width and stress were analyzed. And the measures for improving the sealing performance of spherical sealing were proposed. The results show that the contact width increases parabolically,contact stress decreases exponentially and the contact stress tends to be distributed evenly with the increase of spherical radius,the contact width increases and the contact stress decreases with the decrease of the elastic modulus of sphere,both of the contact width and stress increase parabolically with the increase of sealing surface makeup torque. To enhance the sealing performance of spherical sealing structure,we suggest the following measures:a proper larger spherical radius,a lower elastic modulus of cladding alloy sphere and a properly controlled sealing surface makeup torque for sealing width increase and a proper lower sealing contact stress. The obtained results can be of theoretical significance for sealing parameters optimization,makeup torque control and connection sealing integrity improvement.关键词
油套管/特殊螺纹/球面密封/接触宽度/接触应力/理论分析Key words
tubing and casing/premium connection/sphere sealing/contact width/contact stress/theoretical analysis分类
能源科技引用本文复制引用
许红林,李天雷,杨斌,施太和,张智..油套管特殊螺纹球面对锥面密封性能理论分析[J].西南石油大学学报（自然科学版）,2016,38(5):179-184,6.基金项目
国家自然科学基金（51404048，51244007）；重庆市科委基础与前沿研究计划项目（CSTC2014JCYJA90007）；重庆科技学院校内科研基金项目（CK2016B16）。 （）
