Patent ID: 8770131
Filing Date: 2014-07-08
Classification: B63B

Abstract:
1. A method of accessing each of a plurality of well slots comprising the steps of: providing a spar hull having a centerwell open at an uppermost level and a lowermost level of the spar hull; providing a deck in the centerwell positioned below the uppermost level of the spar hull and attached to the spar hull by shear plates; providing a space between the deck and spar hull to receive equipment along the centerwell; providing a topsides deck supported by the spar hull and having a wellbay opening therethrough that is coaxial with the centerwell; providing access from the topsides deck to the space between the deck and the spar hull at each of the plurality of well slot; positioning a drilling rig on the topsides deck above one of the plurality of well slots; and skidding the drilling rig along the topside deck around the periphery of the wellbay opening in a circular pattern to a position above another of the plurality of well slots, and accessing the another of the plurality of well slots with the drilling rig.