拉扭复合载荷条件下V150钻杆的力学性能研究
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摘要
深井超深井钻井中,不合适的拉扭耦合作用容易导致钻杆失效,因此有必要进行钻杆抗拉扭复合载荷能力研究。采用预扭后拉伸和预拉后扭转的拉扭复合载荷试验方法,分析了拉扭复合载荷条件下V150钻杆在拉伸应力应变和扭转应力应变之间的相互影响规律。试验发现:预扭后拉伸时,预加载切应力和拉伸屈服强度均会降低;预拉后扭转时,预加载的拉应力和扭转屈服强度均会降低;材料发生屈服时的拉应力和切应力符合拉扭椭圆强度准则,该准则的弹性变形安全范围较von Mises强度准则超出24.5%。研究结果表明,按照von Mises强度准则进行V150钻杆抗拉扭复合载荷能力设计偏于保守,而拉扭椭圆强度准则包含材料拉伸屈服强度和扭转屈服强度2个基准参数,且与试验数据吻合程度高,更具工程应用价值。
During the drilling of deep wells and ultra-deep wells, unsuitable tension-torsion coupling results to the failure of drill pipe. Therefore, it is necessary to study the combined tension-torsion resistant loading capacity of drill pipe. The combined tension-torsion loading test methods of pre-torsion followed by tension and pre-tension followed by torsion were used to analyze the interaction laws between the tensile stress/strain and torsional stress/strain of V150 drill pipe. It was found that during the pre-torsion followed by tension, both the preload shear stress and tensile yield strength were reduced; during the pre-tension followed by torsion, both the preload tensile stress and torsional yield strength were reduced. When material yielding occured, the tensile stress and shear stress were in accordance with the tension-torsion ellipse strength criterion, and the elastic deformation safety range of this tension-torsion ellipse strength criterion was 24.5% higher than that of von Mises strength criterion. The results showed that the combined tensiontorsion resistant loading capacity of drill pipe designed according to the von Mises strength criterion was conservative to some extent, while the tension-torsion ellipse strength criterion included two benchmark parameters of tensile yield strength and torsional yield strength. Such criterion perfectly aligned with the experimental data and exhibited high engineering application value.
During the drilling of deep wells and ultra-deep wells, unsuitable tension-torsion coupling results to the failure of drill pipe. Therefore, it is necessary to study the combined tension-torsion resistant loading capacity of drill pipe. The combined tension-torsion loading test methods of pre-torsion followed by tension and pre-tension followed by torsion were used to analyze the interaction laws between the tensile stress/strain and torsional stress/strain of V150 drill pipe. It was found that during the pre-torsion followed by tension, both the preload shear stress and tensile yield strength were reduced; during the pre-tension followed by torsion, both the preload tensile stress and torsional yield strength were reduced. When material yielding occured, the tensile stress and shear stress were in accordance with the tension-torsion ellipse strength criterion, and the elastic deformation safety range of this tension-torsion ellipse strength criterion was 24.5% higher than that of von Mises strength criterion. The results showed that the combined tensiontorsion resistant loading capacity of drill pipe designed according to the von Mises strength criterion was conservative to some extent, while the tension-torsion ellipse strength criterion included two benchmark parameters of tensile yield strength and torsional yield strength. Such criterion perfectly aligned with the experimental data and exhibited high engineering application value.
引文
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[12]欧阳志英,舒志强,袁鹏斌.屈强比对高强度高塑性钻杆性能的影响[J].理化检验-物理分册,2013,49(1):17-21,26.OUYANG Zhiying,SHU Zhiqiang,YUAN Pengbing.Effect of yield ratio on the performance of high strength and high ductility drill pipe[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2013,49(1):17-21,26.
[13]GB/T 228.1-2010金属材料:拉伸试验:第1部分:室温试验方法[S].GB/T 228.1-2010 Metallic materials:tensile testing:part 1:method of test at room temperature[S].
[14]GB/T 10128-2007金属材料室温扭转试验方法[S].GB/T 10128-2007 Metallic materials:torsion test at room temperature[S].
[15]滕学清,陈勉,杨沛,等.库车前陆盆地超深井全井筒提速技术[J].中国石油勘探,2016,20(1):76-88.TENG Xueqing,CHEN Mian,YANG Pei,et al.Whole well ROPenhancement technology for super-deep wells in Kuqa foreland basin[J].China Petroleum Exploration,2016,20(1):76-88.
[2]龚丹梅,余世杰,袁鹏斌,等.V150高强度钻杆断裂失效分析[J].金属热处理,2015,40(10):205-210.GONG Danmei,YU Shijie,YUAN Pengbin,et al.Failure analysis of V150 high strength drill pipe fracture[J].Heat Treatment of Metals,2015,40(10):205-210.
[3]邓宽海,林元华,郭海涛,等.G105钻杆的拉伸和扭转失效研究[J].石油钻采工艺,2013,35(6):5-8,14.DENG Kuanhai,LIN Yuanhua,GUO Haitao,et al.Research of G105 drill pipe failure under loads of pure tension and pure twisting[J].Oil Drilling&Production Technology,2013,35(6):5-8,14.
[4]API 7G Ed.16(1998/R2010)Recommended practice for drill stem design and operating limits[S].
[5]MStandard DS-1T:volume 2 Drill stem design and operation[S].4th ed.2012.
[6]牛杰,刘光连,田杰,等.几个强度理论的屈服实验研究[J].工程力学,2014,31(1):181-187.NIU Jie,LIU Guanglian,TIAN Jie,et al.Comparison of yield strength theories with experimental results[J].Engineering Mechanics,2014,31(1):181-187.
[7]俞茂宏,YOSHIMINE M,强洪夫,等.强度理论的发展和展望[J].工程力学,2004,21(6):1-20.YU Maohong,YOSHIMINE M,QIANG Hongfu,et al.Advances and prospects for strength theory[J].Engineering Mechanics,2004,21(6):1-20.
[8]杨锋平,张良,罗金恒,等.油气输送管典型应力状态下的屈服行为研究[J].工程力学,2013,30(11):293-297.YANG Fengping,ZHANG Liang,LUO Jinheng,et al.Study on the yield behavior of oil and gas pipe in typical stress states[J].Engineering Mechanics,2013,30(11):293-297.
[9]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.Ultimate working torque chart of tool joints in ultra deep well and its application[J].Acta Petrolei Sinica,2016,37(4):516-522.
[10]张彦虎,何伟波.轴向拉力作用下复合钻柱允许扭转圈数的计算方法[J].石油钻探技术,2012,40(5):50-53.ZHANG Yanhu,HE Weibo.Calculation method of allowable torsional rotating number of compound drill string under axial tention[J].Petroleum Drilling Techniques,2012,40(5):50-53.
[11]舒志强,欧阳志英,龚丹梅.高钢级钻杆强度塑性试验研究[J].石油钻探技术,2017,45(5):53-59.SHU Zhiqiang,OUYANG Zhiying,GONG Danmei.Study on strength and plasticity of high steel grade drill pipe[J].Petroleum Drilling Techniques,2017,45(5):53-59.
[12]欧阳志英,舒志强,袁鹏斌.屈强比对高强度高塑性钻杆性能的影响[J].理化检验-物理分册,2013,49(1):17-21,26.OUYANG Zhiying,SHU Zhiqiang,YUAN Pengbing.Effect of yield ratio on the performance of high strength and high ductility drill pipe[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2013,49(1):17-21,26.
[13]GB/T 228.1-2010金属材料:拉伸试验:第1部分:室温试验方法[S].GB/T 228.1-2010 Metallic materials:tensile testing:part 1:method of test at room temperature[S].
[14]GB/T 10128-2007金属材料室温扭转试验方法[S].GB/T 10128-2007 Metallic materials:torsion test at room temperature[S].
[15]滕学清,陈勉,杨沛,等.库车前陆盆地超深井全井筒提速技术[J].中国石油勘探,2016,20(1):76-88.TENG Xueqing,CHEN Mian,YANG Pei,et al.Whole well ROPenhancement technology for super-deep wells in Kuqa foreland basin[J].China Petroleum Exploration,2016,20(1):76-88.