| 摘要 |
An extended-base tension leg substructure (100) and method for supporting an offshore platform is disclosed which includes a plurality of support columms (102) disposed about a central axis (106) of the substructure and interconnected by at least one pontoon (110). Each columm comprises an above water and submerged portion. The substructure also includes a plurality of wings or arms (114) radiating from the columms and/or the pontoons, each win g (114) fixedly or removably securing at least one tendon extending from a win g to an anchor on the seabed. The substructure includes an open, wave transparent central zone (108) for improved access to well-related equipment , conduits or the like and the wings (114) minimize translational movement and rotational flex in the substructure reducing fatigue in the tendons and thei r connections (118). |
