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4. National Oilwell Varco
National Oilwell Varco
Fortune 500 rank: 268
2007 revenue: $9.79 billion
2007 total shareholder return: 140.1%

The Houston-based multinational's profits nearly doubled, to $1.3 billion, as oil giants like Exxon spent more on its equipment to reach new, complex oilfields under the ocean. Increased exploration Latin America, North Africa, East Asia, and the North Sea offset a slowdown North American drilling

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Last updated April 24 2008: 10:54 AM ET
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