Many modern oil and gas wells are drilled directionally. At first, loggers had to run their tools somehow attached to the drill pipe if the well was not vertical.

现在，许多油气井都是定向钻井。起初，在非垂直钻井情况下，测井家不得不将测量仪器嵌接在钻杆上而进行测井。

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In this paper, the controlling system to improve ordinary vertical drill to automatic drilling machine based on PLC is introduced, and the automatic drill is suitable for batch production.

本文给出了用可编程控制器(PLC)将普通立式钻床改造成可批量加工的专用自动钻床的控制方法。

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Large bypass ports open automatically as drill pipe is run into the vertical or horizontal wellbore, diverting mud into the annulus above any restrictions.

当钻杆进入垂直或水平井段时，大孔径旁通自动打开，将泥浆无阻碍导入环空。

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The technology employed is so advanced and exacting that drillers today can hit a target at the end of a drill string that is 10, 000 feet vertical with a mile long horizontal section that is no more than a few inches in diameter.

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The drill results are from the 325 Zone at depths ranging from 187 to 278 meters of vertical depth.

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