特殊螺纹油套管接头完整性评估计算分析
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摘要
针对特殊螺纹油套管接头的主要结构加工参数进行了接头连接和密封性能的评估计算公式推导,并设计完成了一套特殊螺纹接头油套管完整性评估软件。首先,通过对油套管接头失效形式及机理分析,推导出各失效形式对应的临界载荷计算公式;然后,通过对单个螺纹牙的弹性变形分析,建立整体油套管螺纹接头的力学分析模型,结合变形协调方程推导得到接头螺纹牙承载分布求解公式;最后,通过对比临界载荷与实际承载以及密封面总接触压力与管内气体压力完成接头完整性评估。评估结果表明:在相同载荷作用下,TM型接头套管最易发生剪切破坏失效;密封面总接触压力大于管内压力,密封性能良好。
Based on the main structural processing parameters of the casing premium connection,the calculation formulas for the connection and sealing performance were derived. The integrity evaluation software for the casing premium connection was designed and completed. First,the critical load formulas corresponding to each failure form were derived by analyzing the failure form and mechanism of the casing connection. Then,by analyzing the elastic deformation of a single thread tooth,the mechanical analysis model of the casing connection was established,and the solution formula for loading distribution of the connection threads was derived in combination with the deformation coordination equation. Finally,the integrity of the connection was evaluated by comparing the critical load with the actual load and the total contact pressure on the sealing surface with the gas pressure in the pipe.The evaluation results show that under the same load,the TM connection casing was most prone to shear failure; the total contact stress of the sealing surface was greater than the pressure inside the pipe,and the sealing performance was good.
Based on the main structural processing parameters of the casing premium connection,the calculation formulas for the connection and sealing performance were derived. The integrity evaluation software for the casing premium connection was designed and completed. First,the critical load formulas corresponding to each failure form were derived by analyzing the failure form and mechanism of the casing connection. Then,by analyzing the elastic deformation of a single thread tooth,the mechanical analysis model of the casing connection was established,and the solution formula for loading distribution of the connection threads was derived in combination with the deformation coordination equation. Finally,the integrity of the connection was evaluated by comparing the critical load with the actual load and the total contact pressure on the sealing surface with the gas pressure in the pipe.The evaluation results show that under the same load,the TM connection casing was most prone to shear failure; the total contact stress of the sealing surface was greater than the pressure inside the pipe,and the sealing performance was good.
引文
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[13]许志倩,闫相祯,杨秀娟.非API套管接头完整性评估计算方法[J].工程力学,2016,33(2):188-199.
[14]许志倩,闫相祯,杨秀娟,等.非API套管接头主密封结构气密性能试验分析[J].压力容器,2014,31(4):7-12
[15]王建东,冯耀荣,林凯,等.特殊螺纹接头密封结构比对分析[J].中国石油大学学报(自然科学版),2010,34(5):126-130.
[16]高连新,金烨,张居勤.石油套管特殊螺纹接头的密封设计[J].机械工程学报,2005,41(3):216-219.
[17]丁军丹,刘心志,张后雷.冷却型高温熔盐旋转接头的热设计与热分析[J].流体机械,2017,45(4):43-48.
[18]朱斌,廖长洋,林晓平,等.高温导热油旋转接头应用中的事故分析和预防措施[J].流体机械,2017,45(11):58-60.
[19]刘卫东,吕栓录,韩勇,等.特殊螺纹接头油套管验收关键项目及影响因素[J].石油矿场机械,2009,38(12):23-26.
[2] Clinedinst W O. Strength of Threaded Joints for Steel Pipe[J]. Journal of Engineering for Industry,1965,87(2):125-134.
[3] Pattillo P D. Analysis of tubular connections using a thin cylinder approximation—PartⅠ[J]. Journal of Energy Resources Technology,1983,105(4):560-566.
[4]高连新,史交齐.油套管特殊螺纹接头连接技术的研究现状及展望[J].石油矿场机械,2008,37(2):15-19.
[5]蔡晓闻,高连新.我国油套管特殊螺纹接头的发展现状[J].焊管,2008,31(4):41-44.
[6]张居勤.国外油井管特殊扣的主要类型及其特点[J].钢管,2005,34(3):56-60.
[7]祝效华,高原,贾彦杰.弯矩载荷作用下偏梯形套管连接螺纹参量敏感性分析[J].工程力学,2012,29(10):301-307.
[8]张永贵,李子丰,张立萍.真空隔热套管井筒套管强度研究[J].工程力学,2010,27(5):179-183.
[9] Santus C,Bertini L,Beghini M,et al. Torsional strength comparison between two assembling techniques for aluminum drill pipe to steel tool joint connection[J].International Journal of Pressure Vessels and Piping,2009,86(2):177-186.
[10] Dvorkin E N,Toscano R G. Finite element models in the steel industry,PartⅡ:Analyses of tubular products performance[J]. Computers&Structures,2003,81(8-11):575-594.
[11]张季,赵国忠,张皓,等.基于精细螺栓模型的爆破阀热固耦合密封性能分析[J].压力容器,2018,35(2):13-23.
[12] Chen S J,An Q,Zhang Y,et al. Loading analysis on the thread teeth in cylindrical pipe thread connection[J]. Journal of Pressure Vessel Technology,2010,132(3):1-8.
[13]许志倩,闫相祯,杨秀娟.非API套管接头完整性评估计算方法[J].工程力学,2016,33(2):188-199.
[14]许志倩,闫相祯,杨秀娟,等.非API套管接头主密封结构气密性能试验分析[J].压力容器,2014,31(4):7-12
[15]王建东,冯耀荣,林凯,等.特殊螺纹接头密封结构比对分析[J].中国石油大学学报(自然科学版),2010,34(5):126-130.
[16]高连新,金烨,张居勤.石油套管特殊螺纹接头的密封设计[J].机械工程学报,2005,41(3):216-219.
[17]丁军丹,刘心志,张后雷.冷却型高温熔盐旋转接头的热设计与热分析[J].流体机械,2017,45(4):43-48.
[18]朱斌,廖长洋,林晓平,等.高温导热油旋转接头应用中的事故分析和预防措施[J].流体机械,2017,45(11):58-60.
[19]刘卫东,吕栓录,韩勇,等.特殊螺纹接头油套管验收关键项目及影响因素[J].石油矿场机械,2009,38(12):23-26.
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