Although the risks of offshore drilling are much harder to quantify than the benefits, I believe the shift in the benefit-cost ratio has been large enough so that the time has come to allow drilling.

尽管近海开采的风险量化要比其利益量化困难很多，但是我相信收益成本比已经足够大了，因此是时候允许近海开采了。

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The method of cement slurry injection through big-shift directional drilling and its technological parameters used in Gaoyang Iron Ore Mine to seal underground water rushing are introduced.

详细介绍了高阳铁矿实施大位移定向钻孔注浆方法和工艺参数，其成功的经验对治理矿山井下突水淹井事故具有一定的参考价值。

youdao

Mr Kloppers said the writedown on the Fayetteville assets was also a reflection of BHP's decision to change course and shift drilling from dry gas to liquid-rich fields.

BBC: BHP Billiton in $3.3bn writedown as gas prices plunge

The natural gas glut has caused natural gas drilling to be curtailed, making drilling equipment and workers available to shift to going after the oil.

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Secondly, layered on top of our core thesis, we see significant upside from a potential industry shift back toward natural gas drilling.

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