One year ago, an explosion rocked the Deepwater Horizon drilling rig in the Gulf of Mexico, killing 11 workers, sinking the rig, and releasing a massive amount of crude oil into the ocean.

一年前，墨西哥湾深海地平线石油钻机发生爆炸事故，导致11名工人死亡，钻机沉没和大量的原油泄漏进入大海。

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It analysed the feasibility and the limitation of applying mining rig and water well rig to slim hole drilling in shallow gas bearing reservoirs.

分析了矿业钻机与水井钻机用于浅层天然气小眼钻井的可行性及局限性。

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The matching technology research of ultra-deep drilling rig is very important to improve the efficiency of oil and gas development and the overall economy of rig.

超深井钻机配套技术的研究对提高油气田开发的效率，提高钻机的总体经济性等方面都具有极为重大的意义。

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On April twentieth an oil drilling rig, the Deepwater Horizon, exploded and sank about eighty kilometers from the Louisiana coast.

VOA: special.2010.05.04

But he said it was too early to say what caused the April twentieth explosion on the Deepwater Horizon drilling rig.

VOA: special.2010.06.19

The Deepwater Horizon, an oil and gas drilling rig, exploded on April twentieth.

VOA: special.2010.06.04

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

Repsol will be using a Chinese-built drilling rig that only recently left Singapore for Cuban waters.

FORBES: Cuba Chases 5 Billion Barrels of Undiscovered Oil; U.S. Groups Respond

The drilling rig will operate 24 hours a day and will be brightly lit.

BBC: Drilling rig dredges Portsmouth for aircraft carriers