The opening in the hull of a drillship or other offshore drilling vessel through which drilling equipment passes.

钻井船壳体或者其它海洋钻井船舶的开口部分，钻井设备可以通过其中。

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Through the research, an optimization program of gas drilling equipment package is formed.

通过研究，形成了一套气体钻井装备配套优化方案。

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Paper is divided into two parts, core drill equipment and mud system. Through theoretical analysis to experimental method to complete the design of core drilling and mud system.

论文分为取心钻具和泥浆两部分，通过理论分析到实验的方法来完成取心钻具的设计与泥浆体系的建立。

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The loss of the hi-tech equipment has focused attention on the data gathered by the tried-and-tested method of drilling through the ice by hand.

BBC: Arctic team gives up on ice radar