Hydraulic disc brake is used extensively because of its improvement of the capability and safety of drilling operation.

液压盘式刹车装置能显著提高钻井作业能力和安全性，已得到广泛应用。

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Many special and new drilling technologies have been used in the drilling operation of CCSD-1, and high-efficiency, good-quality and low-cost drilling results have been achieved.

总的来说，科钻一井施工采用了许多特殊和新型的钻探技术，施工获得了高效、优质和低成本的好效果。

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Don't switch on during drilling operation.

钻井作业期间不能合闸。

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"But the problem on the relief well is not simply drilling all the way down, it is also connecting it up, and that is a delicate operation that could take some time."

VOA: standard.2010.07.16

Thirty-seven percent of the Gulf is closed to fishing because of an accident involving a deepwater drilling operation.

WHITEHOUSE: Press Briefing

The blame is being laid squarely on the shoulders of BP, under whose auspices the deep-sea drilling operation is being conducted.

FORBES: Blame Big Bad BP For Now, but Where Is the Next Oil to Come From?

Alternatively, they like when an energy manufacturing plant is built in their district, or a fossil fuel mining or drilling operation occurs in their district.

FORBES: What Do Energy Sector Jobs Do For Us?