Offshore Well Drilling System With Nested Drilling Risers
AssigneeCameron International Corporation
InventorsWilliam Puccio, David Cain, Vijay A. Cheruvu, Shian Jiun Chou
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Abstract
An offshore well drilling system for drilling a subsea well, including a floating platform, an external riser extending from the subsea well, and an internal riser extending from the subsea well to the platform. The internal riser is nested within the external riser. The system also includes an external riser tension device to apply tension to the external riser. The system also includes an internal riser tension device, separate from the external riser tension device, to apply tension to the internal riser.
Claims20
An offshore well drilling system for drilling a subsea well, including:
- a floating platform;
- an external riser extending from the subsea well;
- an internal riser nested within the external riser and extending from the subsea well to the platform;
- an external riser tension device to apply tension to the external riser;
- and
- an internal riser tension device, separate from the external riser tension device, to apply tension to the internal riser.
An offshore well drilling system for drilling a subsea well, including:
- a floating platform;
- a subsea wellhead;
- an external riser extending from the subsea wellhead;
- an internal riser nested within the external riser and extending from the subsea wellhead to the platform;
- an external riser tension device to place the external riser in tension;
- an internal riser tension device, separate from the external riser tension device, to dynamically place the internal riser in tension;
- and
- well pressure control equipment located on the platform and connected with the internal riser, the well pressure control equipment being the only well pressure control equipment for the well.
Dependencies are inferred from the claim text.