But BP has not yet been given permission to start the operation, and Wells was more cautious on the timing saying it would take three to four days to first finish the relief well casing.

但是BP还未得到开始操作的批准，并且Wells对时间制定更加谨慎，他说可能要用三到四天完成首次减压井套盖。

youdao

The company is doing reasonably well in Russia and Spain but in Italy its distribution partner asked the company to redesign its casing and packaging.

该公司在俄罗斯和西班牙做得相当不错，但在意大利，汉王的经销伙伴要求该公司重新设计其包装。

youdao

But in case it has to evacuate the area around the damaged well, which lies some 50 miles off the Louisiana coast, BP also placed a special plug inside the well's casing.

但是为了预防，必须从离路易斯安那海岸大约50英里的毁坏的油井附近区域撤离，BP也在油井盒里放置了一个特殊的塞子。

youdao

To get at the oil and gas trapped in shale, drillers use powerful hydraulic pumps to force water and chemicals through holes punched in the concrete-and-steel well casing.

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And then they send down a very high-speed injection of water into the well casing, and of course that flows into the rock and it puts little - tiny little hairline cracks in the rock, opens it up.

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Suffice to say, it feels well-built, which makes sense, as the casing is fashioned entirely out of aluminum.

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