Modular integrated semisubmersible

Abstract

A semisubmersible floating offshore structure. The hull is defined by individual modular buoyant columns. A separate buoyant pontoon is provided at the lower end of each column. Topside structural framing between the columns retains the columns in their spaced relationship. A truss section is attached to the pontoons and a heave plate is attached to the lower portion of the truss section.

1 . A semisubmersible floating offshore structure, comprising:
 a. a plurality of columns;   b. a framework attached to said columns;   c. a separate pontoon attached to the lower end of each column; and   d. a truss framework attached to the pontoons and extending downward therefrom.   
   
   
       2 . The structure of  claim 1 , further comprising a heave plate attached to the lower end of said truss framework. 
   
   
       3 . The structure of  claim 1 , wherein said columns provide buoyancy to the structure. 
   
   
       4 . The structure of  claim 1 , wherein said heave plate is a soft tank. 
   
   
       5 . A semisubmersible floating offshore structure, comprising:
 a. a plurality of buoyant columns;   b. a framework attached to said columns;   c. a separate pontoon attached to the lower end of each column;.   d. a truss framework attached to the pontoons and extending downward therefrom; and   e. a heave plate attached to the lower end of said truss framework.   
   
   
       6 . The structure of  claim 5 , wherein said heave plate is a soft tank.