The longer the single drill pipe , the lesser the critical compressive force of drill stem.

Calculating results show that fluctuation pressure decrease with eccentricity between drill stem and well bore increase.

计算结果表明:随钻柱与井眼间偏心度增大,波动压力减小.全偏心情况下的波动压力大约只有同心情况下的一半.

The drill fluid in the drill stem increases the inertia of lateral vibration.

钻柱内的钻井液增加了钻柱横向振动的惯性质量.

We had to drill down 200 feet to find water.

我们只好往地下钻两百英尺找水.

Many of the reports allow you to drill down and segment for in-depth analysis.

许多报告可让您深入和市场的深入分析.

The vectorial angle method is employed to evaluate the validness of every drill-down operation.

本文采用向量夹角法评估下钻操作的有效性,并给出了对应的高效下钻路径裁剪算法.

Senior executives should drill down decision-rights and accountability to operating managers who handle the capital.

高层管理者应把决策权和责任下放给负责资本运作的操作层管理者.

We had to drill down several layers from the main interface.

我们必须从主界面开始深入几层.

Those recruits are scarcely drillable.

那些新兵几无法训练.

The teacher drilled the English class until they knew the words well.

英语课上,老师训练学生直到他们掌握好了这些词为止.

The farmers drilled wells for water.

农民打井取水.

The discovery well was drilled in 1927 on the basis of magnetic and torsion-balance surveys.

其发现井是1927年根据磁力和扭称测量结果而钻探的.

I drilled five holes at equal distance.

我钻了5个等间距的孔。

The recruits drilled regularly.

新兵们定时操练.

The teacher drilled the class in pronunciation.

老师训练学生发音.

Better germination is obtained if the seed is sown or drilled shortly after a shower.

下雨后即播种会更好促进发芽.

He drilled into the wall of Lili's bedroom.

他在莉莉卧室的墙上钻了个孔。

The Chinese are credited as the first to have drilled deep water wells.

最早凿出深井的光荣属于中国人.

We had multiplication tables drilled into us at school.

以前我们上学得反复背诵乘法表.

The pain is often likened to being drilled through the side of the head.

这种疼痛常被比作钻头钻入头部的感觉。

They drilled through several layers of rock to reach the oil.

他们钻透了几层岩石寻找石油。