可控弯接头钻井工具的偏心机构控制仿真实验

Simulation experiment on the control method for eccentric mechanism of the drilling tool with variable angle bent sub

可控弯接头钻井工具的偏心机构控制方法决定着可控弯接头钻井工具的成败。对已提出的一种基于该可控弯接头钻井工具的控制方法进行了验证。通过Labview软件和Solid Works软件联合仿真实验,并运用牛顿插值法,验证了在外套旋转和不旋转2种情况下,调整导向轴偏置角β公式的正确性,调整导向轴方位角θ公式的正确性以及调整导向轴偏置角β公式和调整导向轴方位角θ公式联合使用的正确性,并得到了各种情况下导向轴的运动轨迹,可为以后的研究提供参考。

The success of the drilling tool with variable angle bent sub is dependent on the control method of its eccentric mech-anism. The control method based on the drilling tool with variable angle bent sub was verifed. Based on the simulation experiment of Labview and SolidWorks software jointly, the correctness of offset angle （β） and azimuth angle （θ） adjustment formulas of the guide shaft and their joint application under two scenarios of sleeve rotation and non-rotation was verifed by means of the Newton interpolation method. Besides, the moving path of guide shaft under various situations was obtained. It provides the theoretical basis for the future study.