基于可控弯接头钻井工具的偏心机构控制方法

A Control Method for Eccentric Mechanism of Controllable Bent Sub Drilling Tool

基于可控弯接头工具的偏心机构提出了一种控制方法。通过分析,得出导向轴偏置方位和角度与内外偏心环转动角度的关系。运用逆解法,得到了内偏心环顺时针转过角度和外偏心环顺时针转过角度唯一对应的偏心机构偏置目标。通过该方法可以实现预先想要设定的偏心机构偏置目标位置。

A control method for eccentric mechanism of controllable bent sub drilling tool is proposed in this paper. The relationships between the offset azimuth and angle of guiding shaft and the rotational angles of inner eccentric ring and outer eccentric ring are de- rived. The unique corresponding relationship between the offset target of the eccentric mechanism and the clockwise rotation angles of inner eccentric ring and outer eccentric ring is obtained using the inverse method. The anticipated offset target of the eccentric mecha- nism can be achieved using the established method.