The flow stress behavior of grade G-105 steel （API standard） for oil drill pipe in hot compressive deformation was studied by isothermal compression tests on Gleeble- 1500 thermal-mechanical machine. Referring to es...The flow stress behavior of grade G-105 steel （API standard） for oil drill pipe in hot compressive deformation was studied by isothermal compression tests on Gleeble- 1500 thermal-mechanical machine. Referring to established empirical formulas, the constitutive equation of the flow stress for G-105 steel was obtained. For the grade G- 105 oil drill pipe （φ114.3× 10.92 mm）, through proper design of the die and applying suitable process parameters, and using coupled rigid viscoplastic thermo-mechanical finite element method, the forming process of making upset on oil drill pipe was numerically simulated. The simulation results show that the internal transition section of the oil drill pipe is not only continuous and smooth but also long （up to about 220-250 mm）.展开更多
介绍了超深井用Φ149.2 mm V150钢级高抗扭钻杆的研发过程,详细阐述其关键制造技术、产品的力学性能以及产品使用效果。Φ149.2 mm高抗扭钻杆采用了高强度高韧性V150钢级管体,并对管体进行了镦锻,接头螺纹结构采用了BHDX57螺纹。分析认...介绍了超深井用Φ149.2 mm V150钢级高抗扭钻杆的研发过程,详细阐述其关键制造技术、产品的力学性能以及产品使用效果。Φ149.2 mm高抗扭钻杆采用了高强度高韧性V150钢级管体,并对管体进行了镦锻,接头螺纹结构采用了BHDX57螺纹。分析认为:Φ149.2 mm高抗扭钻杆相较于API标准S135钻杆具有更高的屈服强度和冲击韧性,且性能稳定可靠、使用寿命长,满足了8000 m以上超深井安全钻探和高效钻探的需求;解决了Φ139.7 mm S135钻杆抗拉强度过低及Φ168.3 mm S135钻杆环空过小的问题。展开更多
文摘The flow stress behavior of grade G-105 steel （API standard） for oil drill pipe in hot compressive deformation was studied by isothermal compression tests on Gleeble- 1500 thermal-mechanical machine. Referring to established empirical formulas, the constitutive equation of the flow stress for G-105 steel was obtained. For the grade G- 105 oil drill pipe （φ114.3× 10.92 mm）, through proper design of the die and applying suitable process parameters, and using coupled rigid viscoplastic thermo-mechanical finite element method, the forming process of making upset on oil drill pipe was numerically simulated. The simulation results show that the internal transition section of the oil drill pipe is not only continuous and smooth but also long （up to about 220-250 mm）.
文摘介绍了超深井用Φ149.2 mm V150钢级高抗扭钻杆的研发过程,详细阐述其关键制造技术、产品的力学性能以及产品使用效果。Φ149.2 mm高抗扭钻杆采用了高强度高韧性V150钢级管体,并对管体进行了镦锻,接头螺纹结构采用了BHDX57螺纹。分析认为:Φ149.2 mm高抗扭钻杆相较于API标准S135钻杆具有更高的屈服强度和冲击韧性,且性能稳定可靠、使用寿命长,满足了8000 m以上超深井安全钻探和高效钻探的需求;解决了Φ139.7 mm S135钻杆抗拉强度过低及Φ168.3 mm S135钻杆环空过小的问题。
