... hydrologic well-drilling machine 水文地质钻井机 oil-well drilling 油井钻探 old-well added drilling 老油井加深钻井 ...
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油井钻探和油井服务主管之间几乎没有流动性。
There is little mobility for supervisors from well services to well drilling.
其抗腐性使其在经济上优于钢和其他金属，这类用途有油井钻探设备、化学品管道、贮罐及类似设备。
Their corrosion-resistant properties make them preferable to steel and other metals on an economic basis, for such uses as oil-well drilling equipment, chemical piping, tanks, and similar equipment.
帕森斯博士表示，这些研究资料对石油公司也会非常有用，如果他们想在有暗河存在的地区钻探油井的话。
Dr Parsons said data from the research will also be important for oil companies looking to drill in areas where these rivers exist.
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