hole deviation control的意思|示意

The downhole stabilizer location adjuster, fixed between the bit and the drill collar, is a special tool for continual deviation control of a slant hole.

井下稳定器安放位置调节器是斜井旋转钻井时实施井斜连续控制的专用工具， 安装在钻头与钻铤之间。

The on-site tests of 5 wells showed that the stiffness of lower drill pipe assembly was increased to control deviation in the straight hole.

经现场5口井试验表明，不弯曲钻铤能够起到增大下部钻具组合刚度，控制直井段井斜的作用；

Also it is difficult to control hole deviation.

因此，钻进效率低，回次进尺短，孔斜不易控制。