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US 2007/0163782 A1Published application
Dual-bop and common riser system
AssigneeTransocean Offshore Deepwater Drilling Inc.
InventorChip Keener
Life of this patent
Estimating the term…
Abstract
The disclosure is drawn to methods of drilling wells utilizing blow out prevention components of differing pressure ratings. In the initial drilling phase, a lower pressure rated blow out prevention component is used. In a subsequent drilling phase where a reservoir of a natural resource is penetrated, a higher pressure rated blow out prevention component is used.
Claims10
A method of drilling a well comprising the steps of
- (a) drilling to a first well depth with a drilling apparatus having a first blowout prevention component, and
- (b) drilling to a second well depth with a drilling apparatus having a second blowout prevention component.
Dependencies are inferred from the claim text.