Dual-BOP and common riser system
First Claim
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1. A method of drilling a well comprising the steps ofpositioning a first drilling apparatus having a riser connected to a first subsea blowout prevention component on the well;
- drilling the well to a first well depth with the first drilling apparatus;
moving the first drilling apparatus from the well to a seabed storage location;
positioning said first drilling apparatus on the seabed storage location, anddrilling the well to a second well depth with a second drilling apparatus having the riser connected to a second-subsea blowout prevention component positioned at or near the seabed.
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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.
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Citations
20 Claims
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1. A method of drilling a well comprising the steps of
positioning a first drilling apparatus having a riser connected to a first subsea blowout prevention component on the well; -
drilling the well to a first well depth with the first drilling apparatus; moving the first drilling apparatus from the well to a seabed storage location; positioning said first drilling apparatus on the seabed storage location, and drilling the well to a second well depth with a second drilling apparatus having the riser connected to a second-subsea blowout prevention component positioned at or near the seabed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for drilling a well comprising the steps of:
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positioning a first subsea blowout preventer on a well head; drilling a first portion of the well through a riser and lower marine riser package connected to the first subsea blowout preventer; removing the riser, lower marine riser package, and first subsea blowout preventer from the well head; positioning the riser, lower marine riser package, and first subsea blowout preventer on a seabed storage location; separating the lower marine riser package from the first subsea blowout preventer; lowering a second subsea blowout preventer to the well head; and drilling a second portion of the well through the riser and lower marine riser package connected to the second subsea blowout preventer. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification