顶驱中心管螺纹力学行为模拟及优化研究
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摘要
针对顶驱中心管螺纹粘扣、断裂等问题,基于弹塑性理论、von Mises屈服准则以及中心管材料本构模型试验研究结果,建立了扭矩作用下的二维、三维有限元模型,并通过实验结果与数值模拟结果验证有限元分析的可靠性,对比二维、三维的分析结果验证二维轴对称模型方法的可靠性,获得了中心管螺纹接头的应力分布规律和力学特性,指出紧扣扭矩对螺纹连接强度影响极大。在此基础上,结合现场失效的螺纹接头,对螺纹锥度、螺距以及有效螺纹牙长度3个参量进行敏感性分析,综合考虑连接强度以及生产成本推荐了参量最优值。
Aiming at the problem of thread gluing, fracture of the threaded coupling in top drive center pipe thread, 2 D and 3 D finite element models under torques were established based on the virtual work principle, von Mises yield criterion and experimental results of constitutive model of central pipes. The reliability of finite element analysis was verified by the results of experimental and numerical simulations. The reliability 2 D axisymmetric finite element model was illustrated by comparing of 2 D, 3 D results. The stress distribution and mechanics properties of the central pipe thread joints are obtained, which point out that the tightening torques have great influences on connection strength. Then on the basis of that combining with the field failures of the tool joints, the finite element sensitivity analysis on the three parameters including taper, pitch and effective thread length were carried out, and the optimal values among the parameters were recommended with the comprehensive considerations of connection strengths and production costs.
Aiming at the problem of thread gluing, fracture of the threaded coupling in top drive center pipe thread, 2 D and 3 D finite element models under torques were established based on the virtual work principle, von Mises yield criterion and experimental results of constitutive model of central pipes. The reliability of finite element analysis was verified by the results of experimental and numerical simulations. The reliability 2 D axisymmetric finite element model was illustrated by comparing of 2 D, 3 D results. The stress distribution and mechanics properties of the central pipe thread joints are obtained, which point out that the tightening torques have great influences on connection strength. Then on the basis of that combining with the field failures of the tool joints, the finite element sensitivity analysis on the three parameters including taper, pitch and effective thread length were carried out, and the optimal values among the parameters were recommended with the comprehensive considerations of connection strengths and production costs.
引文
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[4]陈守俊,李强,张毅,等.圆锥管连接螺纹牙变形及应力分布研究[J].中国机械工程,2010,21(17):2044-2049.CHEN Shoujun,LI Qiang,ZHANG Yi,et al.Research on Deformation and Stress Distribution on Thread Teeth at Conic Thread Connections[J].China Mechanical Engineering,2010,21(17):2044-2049.
[5]兰洪波,高德利,张国辉.149.3mm钻杆高强度接头数值分析[J].天然气工业,2008(9):67-68.LAN Hongbo,GAO Deli,ZHANG Guohui.Numerical Analysis of 5-7/8″High-strength Drill Pipe Joint[J].Natural Gas Industry,2008(9):67-68.
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[7]BAHAI H.A Parametric Model for Axial and Bending Stress Concentration Factors in API Drill String Threaded Connectors[J].International Journal of Pressure Vessels and Piping,2001,78(7):495-505.
[8]CHEN S J,LI Q,YI Z,et al.Finite Element Analysis of Tooth Load Distribution on P-110S Conic Threaded Connections[J].International Journal of Pressure Vessels and Piping,2011,88(2):88-93.
[9]SHAHANI A R,SHARIFI S M H.Contact Stress Analysis and Calculation of Stress Concentration Factors at the Tool Joint of a Drill Pipe[J].Mater.Des.,2009,30:3615-3621.
[10]BRENNAN F B,DOVER W D.Stress Intensity Factors for Threaded Connections[J].Engrg.Fracture Mech.,1995,134:545-567.
[11]狄勤丰,陈锋,王文昌,等.双台肩钻杆接头三维力学分析[J].石油学报,2012,33(5):871-877.DI Qinfeng,CHEN Feng,WANG Wenchang,et al.Three-dimentional Mechanical Analysis of the Double-shouldered Tool Joint[J].Acta Petrolei Sinica,2012,33(5):871-877.
[12]赵楠.螺杆钻具螺纹承载能力评价方法研究[D].成都:西南石油大学,2013.ZHAO Nan.Research on Evaluation Method of Thread Bearing Capacity of the Screw Drill[D].Chengdu:Southwest Petroleum University,2013.
[13]狄勤丰,陈锋,李宁,等.超深井钻具接头极限工作扭矩图版及其应用[J].石油学报,2016,37(4):516-522.DI Qinfeng,CHEN Feng,LI Ning,et al.Determination of Operating Load Limits for Rotary Shouldered Connections with Three-dimensional Finite Element Analysis[J].Acta Petrolei Sinica,2016,37(4):516-522.
[14]API RP7A1-1992.Recommended Practice for Testing for Thread Compound for Rotary Shouldered Connections[S].Washington D C:American Petroleum Institute Production Department,1992.
[15]王勇,高连新,袁鹏斌.双台肩钻杆内螺纹接头纵向开裂原因分析[J].机床与液压,2015(22):183-186.WANG Yong,GAO Lianxin,YUAN Pengbin.Cause Analysis of Vertical Fracture of the Rifled Connection of Double-shouldered Drill Pipe[J].Machine Tool&Hydraulics,2015(22):183-186.
[2]SCHWIND B.Mobil Qualifies Three Tubing/Casing Connection Product Lines[J].Petroleum Engineer International,1998,71:59-62.
[3]袁光杰,姚振强.油套管螺纹连接抗粘扣技术的研究现状及展望[J].钢铁,2003,38(11):66-69.YUAN Guangjie,YAO Zhenqiang.Recent Situation and Future of Anti-galling Technique for API Round Thread[J].Iron and Steel,2003,38(11):66-69.
[4]陈守俊,李强,张毅,等.圆锥管连接螺纹牙变形及应力分布研究[J].中国机械工程,2010,21(17):2044-2049.CHEN Shoujun,LI Qiang,ZHANG Yi,et al.Research on Deformation and Stress Distribution on Thread Teeth at Conic Thread Connections[J].China Mechanical Engineering,2010,21(17):2044-2049.
[5]兰洪波,高德利,张国辉.149.3mm钻杆高强度接头数值分析[J].天然气工业,2008(9):67-68.LAN Hongbo,GAO Deli,ZHANG Guohui.Numerical Analysis of 5-7/8″High-strength Drill Pipe Joint[J].Natural Gas Industry,2008(9):67-68.
[6]袁光杰,林元华,姚振强,等.API偏梯形套管螺纹连接的接触应力场研究[J].钢铁,2004,39(9):66-69.YUAN Guangjie,LIN Yuanhua,YAO Zhenqiang,et al.Research on Contact Stress Field of API ButTress Casing Thread Connection[J].Iron and Steel,2004,39(9):66-69.
[7]BAHAI H.A Parametric Model for Axial and Bending Stress Concentration Factors in API Drill String Threaded Connectors[J].International Journal of Pressure Vessels and Piping,2001,78(7):495-505.
[8]CHEN S J,LI Q,YI Z,et al.Finite Element Analysis of Tooth Load Distribution on P-110S Conic Threaded Connections[J].International Journal of Pressure Vessels and Piping,2011,88(2):88-93.
[9]SHAHANI A R,SHARIFI S M H.Contact Stress Analysis and Calculation of Stress Concentration Factors at the Tool Joint of a Drill Pipe[J].Mater.Des.,2009,30:3615-3621.
[10]BRENNAN F B,DOVER W D.Stress Intensity Factors for Threaded Connections[J].Engrg.Fracture Mech.,1995,134:545-567.
[11]狄勤丰,陈锋,王文昌,等.双台肩钻杆接头三维力学分析[J].石油学报,2012,33(5):871-877.DI Qinfeng,CHEN Feng,WANG Wenchang,et al.Three-dimentional Mechanical Analysis of the Double-shouldered Tool Joint[J].Acta Petrolei Sinica,2012,33(5):871-877.
[12]赵楠.螺杆钻具螺纹承载能力评价方法研究[D].成都:西南石油大学,2013.ZHAO Nan.Research on Evaluation Method of Thread Bearing Capacity of the Screw Drill[D].Chengdu:Southwest Petroleum University,2013.
[13]狄勤丰,陈锋,李宁,等.超深井钻具接头极限工作扭矩图版及其应用[J].石油学报,2016,37(4):516-522.DI Qinfeng,CHEN Feng,LI Ning,et al.Determination of Operating Load Limits for Rotary Shouldered Connections with Three-dimensional Finite Element Analysis[J].Acta Petrolei Sinica,2016,37(4):516-522.
[14]API RP7A1-1992.Recommended Practice for Testing for Thread Compound for Rotary Shouldered Connections[S].Washington D C:American Petroleum Institute Production Department,1992.
[15]王勇,高连新,袁鹏斌.双台肩钻杆内螺纹接头纵向开裂原因分析[J].机床与液压,2015(22):183-186.WANG Yong,GAO Lianxin,YUAN Pengbin.Cause Analysis of Vertical Fracture of the Rifled Connection of Double-shouldered Drill Pipe[J].Machine Tool&Hydraulics,2015(22):183-186.