文献类型：期刊文献

中文题名：特殊螺纹石油套管接头密封结构优选

英文题名：Selection of Sealing Structure of Casing Connection with Premium Thread

作者：吴翔实[1];高连新[1];袁鹏斌[2];周永其[2]

机构：[1]华东理工大学机械与动力工程学院;[2]上海海隆石油管材研究所

年份：2017

卷号：45

期号：6

起止页码：30

中文期刊名：石油机械

外文期刊名：China Petroleum Machinery

收录：CSTPCD

基金：上海市科研计划项目:"海洋油气钻采用高强高密封钻杆的研发与应用"(14XD1424400)

语种：中文

中文关键词：石油套管接头;金属对金属密封;密封性能;有限元;全尺寸

外文关键词：casing connection;;metal-to-metal seal;;sealing performance;;finite element;;full size

摘要：为了保证石油套管接头在高温、高压及强腐蚀工作环境下的密封完整性,采用金属对金属的密封方式代替橡胶密封。阐述了金属对金属密封的密封机理,根据厚壁圆筒弹性力学理论,推导出了石油套管接头锥形密封面最大过盈量的计算方法。利用有限元分析软件Marc建立石油套管接头的二维轴对称模型,分析了不同过盈量下密封面锥度和扭矩台肩角度对接头密封性能的影响,并对密封结构参数进行优化。采用有限元法与全尺寸试验相结合的方法验证石油套管接头在机紧、机紧+拉伸、机紧+拉伸+内压3种工况下的密封性能,结果表明该石油套管接头满足密封要求,在机紧+拉伸工况下接头的密封强度最差,设计时应优先考虑该工况。研究结果对特殊螺纹接头的开发和使用具有较高的参考价值。
To ensure the sealing integrity of casing connection in high temperature,high pressure and highly corrosive working environment,metal-to-metal sealing method is used instead of rubber sealing. The sealing mechanism of metal-to-metal seal has been described. Based on the theory of elasticity of thick-walled cylinder,the calculation method of the maximum interference of conical sealing surface of casing connection has been deduced. The finite element analysis software Marc was used to establish the 2-D axisymmetric model of the casing connection to study the influence of the sealing surface taper and the torque shoulder angle on the sealing performance of the connection,and to optimize the parameters of the sealing structure. The sealing performances of casing connection under the conditions of tight,tight + tension,tight + tension + internal pressure have been verified by the method of finite element method and full-size test. The results show that the casing connection meets the sealing requirements.The sealing strength of the connection is the worst in the tight + tension conditions,thus the design should give priority to this condition. The study results could provide references for the development and application of premium thread connection.