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Nature of Business (Details) (Continuing operations)
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Jun. 30, 2014
drillingunit
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Continuing operations
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| Number of mobile offshore drilling units | 77 |
| Number of High-Specification Floaters (in drilling units) | 46 |
| Number of Midwater Floaters (in drilling units) | 21 |
| Number of High-Specification Jackups (in drilling units) | 10 |
| Number of Ultra-Deepwater drillships under construction (in drilling units) | 9 |
| Number of High-Specification Jackup under construction (in drilling units) | 5 |
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- Definition
Number of High-Specification Floaters, which includes Ultra-Deepwater, Deepwater and Harsh Environment semisubmersibles and drillships. High-Specification Floaters are specialized offshore drilling units with a water depth capacity of 4,500 feet or greater. No definition available.
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- Definition
Number of High-Specification Jackups. High-Specification Jackups are harsh environment and high-performance jackups. Jackups are self-elevating drilling platforms that have legs that can be lowered to the ocean floor to establish a foundation to support the drilling platform. These units are generally suited for water depths of 400 feet or less. No definition available.
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- Definition
Number of High-Specification Jackups under construction. No definition available.
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- Definition
Number of Midwater Floaters. Midwater Floaters are non-high-specification semisubmersibles with a water depth capacity of less than 4,500 feet. No definition available.
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- Definition
Number of mobile offshore drilling units we own, had partial ownership interests in or operated at the measurement date. No definition available.
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- Definition
Number of Ultra-Deepwater drillships under construction. No definition available.
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