水下采油树生产模块通道多相冲蚀数值分析
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摘要
冲蚀是水下采油树生产通道失效的主要因素。通过对冲蚀机理的研究,分析了冲蚀的本质和能量平衡,并对冲蚀的影响因素进行了分析。采用Fluent软件建立了水下采油树生产模块通道模型,对模型的内部流场进行了分析。分析结果表明,冲蚀的本质是机械磨损和化学、电化学腐蚀,主要受流体的流速、入射角度和磨粒特性等因素的影响;水下采油树生产模块通道冲蚀最严重部位在相贯线上和外拱壁处;冲蚀率和冲蚀深度随流体速度的增大而增大,一定速度后呈指数增长,随颗粒直径的增大而减小,随颗粒体积分数的增大而增大。研究结果可为有效防治冲蚀和机械结构优化提供参考。
Erosion is a main factor causing failure of subsea X-tree production line. By studying the mechanism of erosion,this paper analyzed the essence and energy balance of erosion,as well as erosion factors. Subsea X-tree production line model was established with Fluent in order to analyze the internal flow field. The results show that erosion is essentially mechanical wear or chemical/electrochemical corrosion,which is mainly affected by fluid velocity,incidence angle and abrasive characteristics and other factors. The worst erosion of the subsea X-tree production line often occurs on the intersecting line and outside arch wall. The erosion rate and depth increase as the fluid velocity increases,and increase exponentially after the velocity reaches a certain level. Furthermore,the erosion rate and depth decrease with the increase of particle diameter,and increase with the increase of particle volume fraction.
Erosion is a main factor causing failure of subsea X-tree production line. By studying the mechanism of erosion,this paper analyzed the essence and energy balance of erosion,as well as erosion factors. Subsea X-tree production line model was established with Fluent in order to analyze the internal flow field. The results show that erosion is essentially mechanical wear or chemical/electrochemical corrosion,which is mainly affected by fluid velocity,incidence angle and abrasive characteristics and other factors. The worst erosion of the subsea X-tree production line often occurs on the intersecting line and outside arch wall. The erosion rate and depth increase as the fluid velocity increases,and increase exponentially after the velocity reaches a certain level. Furthermore,the erosion rate and depth decrease with the increase of particle diameter,and increase with the increase of particle volume fraction.
引文
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[5]赵旭东,王定亚,刘文霄,等.基于CFD的水下采油树生产通道流动数值模拟[J].石油机械,2014,42(11):105-108.
[6]丁矿,朱宏武,张建华,等.直角弯管内液固两相流固体颗粒冲蚀磨损分析[J].油气储运,2013,32(3):241-246.
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[11]Pyboyina.Experimental investigation and computational fluid dynamics simulations of erosion on electrical resistance probes[D].Tulsa:University of Tulsa,2006.
[12]汪爽,倪超,严梦姗.气体钻井井口装置冲蚀规律研究及优化配置[J].钻采工艺,2014,37(5):8-12.
[2]马颖,任峻,李元东,等.冲蚀磨损研究的进展[J].兰州理工大学学报,2005,31(1):21-25.
[3]卢斌.喷射式冲蚀实验装置研制及油井管柱抗冲蚀性能研究[D].西安:西安石油大学,2012.
[4]董刚,张九渊.固体粒子冲蚀磨损研究进展[J].材料科学与工程学报,2003,21(2):307-312.
[5]赵旭东,王定亚,刘文霄,等.基于CFD的水下采油树生产通道流动数值模拟[J].石油机械,2014,42(11):105-108.
[6]丁矿,朱宏武,张建华,等.直角弯管内液固两相流固体颗粒冲蚀磨损分析[J].油气储运,2013,32(3):241-246.
[7]Finnie I,Mcfadden D H.On the velocity dependence of the ero sion of ductilemetals by solid particles at low angles of incidence[J].Wear,1978,48(1):181-190.
[8]Bitter J G A.A study of erosion phenomena[J].Wear,1963,6(1):5-21.
[9]Misra A,Finnie I.On the size effect in abrasive and erosion wear[J].Wear,1981,65(3):359-373.
[10]Zhang Y,Reuterfors E P,Mclaury B S,et al.Comparison of computed and measured particle velocities and erosion in water and air flows[J].Wear,2007,263:330-338.
[11]Pyboyina.Experimental investigation and computational fluid dynamics simulations of erosion on electrical resistance probes[D].Tulsa:University of Tulsa,2006.
[12]汪爽,倪超,严梦姗.气体钻井井口装置冲蚀规律研究及优化配置[J].钻采工艺,2014,37(5):8-12.