1) core barrel rod
导向钻杆
2) stearable assemly
导向螺杆钻具
3) augersinkerbar guides
冲击钻杆导向器
5) pilot drilling
导向钻进
1.
2 Mine used small-diameter pilot drilling,then gradually reaming the borehole and finally completed to designed size.
宣东二号矿布设施工的大口径瓦斯抽放井以小口径导向钻进,后逐级扩孔成井。
6) Steerable drilling
导向钻井
1.
During theoretic research and field practice, we researched the steerable drilling horizontal section, programmed the mechanical analysis software of steerable drilling assembly with Weighted Residuals Method, and studied the rotary drilling build-angl.
在水平井井眼轨迹控制施工中 ,导向钻井系统在斜井段和水平段的施工中均获得了显著的技术经济效益。
补充资料：导向
引导的方向：新闻工作要坚持正确的舆论导向。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条