Method for retrieving riser for storm evacuation

Details Method for retrieving riser for storm evacuation Method for retrieving riser for storm evacuation

2006-05-09

2008-11-18

Beach, Thomas A (Department: 3671)

Wells

Submerged well

Means removably connected to permanent well structure

C166S339000, C166S364000, C166S365000

Reexamination Certificate

active

07451822

ABSTRACT:
A method for preparing to move a floating structure away from a wellbore drilled below the bottom of a body of water includes filling a riser extending from the bottom of the body of water to the floating structure with water. The water in the riser is displaced to a selected first depth below the water surface. The riser is sealed at a second selected depth shallower than the first selected depth. The portion of the riser above the second selected depth is withdrawn onto the floating structure.

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