Patent ID: 8899879
Filing Date: 2014-12-02
Classification: E02B

Abstract:
1. A structure-supported jackup system, comprising: a main deck structure; a plurality of legs movably coupled with the main deck structure; a cantilever disposed upon the main deck structure; a derrick disposed upon the cantilever; wherein the main deck structure, the plurality of legs, the cantilever and the derrick form a jackup drilling unit; two or more support base structures disposed on seabed; and a plurality of movable supports, wherein each of the plurality of movable supports is securely coupled with the main deck structure; so that during a process of the structure-supported jackup system is being assembled, the plurality of movable supports extend from the main deck structure to top of the two or more support base structures while the plurality of legs provide support for the jackup drilling unit, and after the structure-supported jackup system is assembled, the two or more support base structures provide support for the jackup drilling unit via the movable supports, and the plurality of legs are retracted into a position out of water.