Two days after the explosion, the rig sank to the ocean floor, and a pipe connected to the well on the sea floor broke.

在爆炸发生后两日，钻井平台沉入海底，连接海床油井的输油管道破裂。

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BP has been battling to stop oil spilling out of the well since an explosion on the Deepwater Horizon rig on April 20, an event which triggered a steep plunge in the firm's share price.

4月20日深水地平线钻井平台爆炸以来，英国石油公司一直竭力阻止原油泄漏，此次爆炸导致英国石油股价暴跌。

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Steel workers in Louisiana began building the nearly 70-ton cap in the days after the leak was discovered at the site of a damaged well that had been connected to an oil rig.

在发现漏油几天后，路易斯安那州的钢铁工人开始建造这个近70吨重的钢盖。漏油发生在和钻井平台相连接的一个受到损害的油井。

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BP is the British-based energy company that operated the well and leased the Deepwater Horizon from the rig's owner,Transocean.

VOA: special.2011.04.23

Overall, the Series 7 Gamer is a respectable, well-designed rig with only a hint of the stereotypically hardcore.

ENGADGET: Samsung Series 7 Gamer review: the company's first gaming laptop makes its way to the US

Development Driller II, the rig drilling a second relief well as a redundancy measure, is completing preparations for its blowout preventer to be used on the Macondo well, while the Development Driller III -- the rig drilling the relief well expected to intercept the main well -- is standing by until that's done.

CNN: STORY HIGHLIGHTS

And if so, what about the other companies that were involved in some way that may have an interest in the well or the rig -- are they liable at all?

WHITEHOUSE: Press Briefing on BP Oil Spill