| 基于Bezier曲线的特殊螺纹密封面参数化设计 |
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| 引用本文： | 张颖,练章华.基于Bezier曲线的特殊螺纹密封面参数化设计[J].中国安全生产科学技术,2019,15(11):24-28. |
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| 作者姓名： | 张颖 练章华 |
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| 作者单位： | （1.四川轻化工大学 过程装备与控制工程四川省高校重点实验室，四川 自贡 643000；2.西南石油大学 油气藏地质及开发工程国家重点实验室，四川 成都 610500） |
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| 基金项目： | * 基金项目: 国家自然科学基金项目（51574198）；四川轻化工大学人才引进项目（2019RC17）；四川省高校重点实验室开发基金项目（GK201914）；自贡市重点科技计划项目（2019YYJC01） |
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| 摘 要： | 为提高油套管特殊螺纹密封性能，优化特殊螺纹密封结构，基于Bezier曲线理论方法，提出1套特殊螺纹球面对锥面密封结构参数化设计方法，并设计了1种基于Bezier曲线理论的特殊螺纹密封结构。通过数值模拟方法，对比分析新型特殊螺纹密封结构与传统球面/锥面密封结构形式密封面上接触应力分布。结果表明:基于Bezier曲线设计的特殊螺纹密封结构可提高密封面接触压力，改善螺纹接头密封区塑性区域分布，有利于提高特殊螺纹接头的抗疲劳性能，有效预防特殊螺纹接头应力腐蚀断裂，为深井、超深井油管柱螺纹接头的密封设计提供参考。
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| 关 键 词： | Beizer曲线 特殊螺纹 密封结构 数值模拟 |
Parametric design for sealing surface of premium connection based on Bezier curve |
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| ZHANG Ying,LIAN Zhanghua.Parametric design for sealing surface of premium connection based on Bezier curve[J].Journal of Safety Science and Technology,2019,15(11):24-28. |
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| Authors: | ZHANG Ying LIAN Zhanghua |
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| Affiliation: | (1.Sichuan Provincial Key Lab of Process Equipment and Control,Sichuan University of Science & Engineering,Zigong Sichuan 643000,China;2.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu Sichuan 610500,China) |
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| Abstract: | In order to improve the sealing performance of premium connection for the tubing and casing,and optimize the sealing structure of premium connection,a method of parametric design for the sealing structure with spherical surface to conical surface of the premium connection was put forward based on the theoretical method of Bezier curve,and a sealing structure of premium connection based on the Bezier curve theory was designed.Through the numerical simulation method,the distribution of contact stress on the sealing surface of the new sealing structure of premium connection and the traditional spherical surface/conical surface sealing structure form were compared and analyzed.The results showed that the sealing structure of premium connection based on the Bezier curve design could increase the contact pressure on the sealing surface and improve the plastic zone distribution on the sealing zone of connection joint.It is benefit for enhancing the anti fatigue performance of premium connection joint,and it can effectively prevent the stress corrosion cracking of premium connection joint,which can satisfy the safe and reliable production of tubing string in the deep or ultra deep gas well. |
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| Keywords: | Bezier curve premium connection sealing structure numerical simulation |
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