Patent ID: 8186292

Claim:
A floating marine apparatus comprises: a marine structure floating on water; and a liquefied natural gas (LNG) tank installed on the marine structure, the LNG tank comprising: a top wall, a bottom wall, a first LNG containing compartment, a second LNG containing compartment next to the first compartment, and a partitioning wall partitioning between the first and second compartments, the partitioning wall comprising a top section connected to the top wall, a bottom section, and an intermediate section interposed between the top and bottom sections, the bottom section comprising a lower portion connected to the bottom wall and a upper portion connected to the intermediate section, wherein the bottom section becomes generally gradually thicker from the upper portion to the bottom wall such that the lower portion connected to the bottom wall is thicker than the upper portion connected to the intermediate section, the bottom section further comprises a passage through a thicker lower portion for fluid communication between the first and second compartments.