Dual Drilling Activity Drilling Ship
First Claim
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1. A method comprising:
- outfitting a drilling ship with two separate and distinct drilling centers, each capable of drilling a well; and
providing marine risers for each of said drilling centers, the marine risers for one of the drilling centers being of a smaller diameter than the marine risers for the other of said drilling centers.
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Abstract
A single drilling ship may be equipped with two drilling centers, each capable of running risers. Each drilling center has a set of tubulars stored for use in association with that drilling center, those tubulars including risers. However, the risers for one drilling center are of a smaller diameter than the risers for the other drilling center. In the event that a main drilling center drilled well fails, a relief well can then be drilled from the same ship using a secondary drilling center.
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Citations
21 Claims
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1. A method comprising:
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outfitting a drilling ship with two separate and distinct drilling centers, each capable of drilling a well; and providing marine risers for each of said drilling centers, the marine risers for one of the drilling centers being of a smaller diameter than the marine risers for the other of said drilling centers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A drilling ship comprising:
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a first drilling center including storage to store first marine risers; a second drilling center to drill a second well from the same ship, the second drilling center including storage to store second marine risers, said second marine risers having a smaller diameter than said first marine risers. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification