To deepen a wellbore with the drill bit. To drill ahead.
用钻头加深井眼，往深处钻进。
Experimental study on physical modeling of the foaming oil wellbore.
泡沫油井筒物理模拟实验研究。
Yield front propagates away from the wellbore with the process of sand production.
屈服带随出砂量的增加沿井径向外扩张。
Signal transmission is the principal part of automatic control system for wellbore trajectory.
信号传播是井眼轨道自动控制系统的重要组成部分。
Signal transmission is the principal part of automatic control system for wellbore trajectory.
信号传播是井眼轨道自动控制系统的重要组成部分。
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