C-semi with minimum hydrodynamic forces

摘要

An offshore floating structure (10) for the drilling and production of oil and gas includes a generally circular toroidal, hollow pontoon (11) of substantially the same radial width throughout a perimeter of the pontoon. The offshore floating structure includes a plurality of columns (12) of substantially a same cross-sectional area, each coupled at a coupling point, on a bottom end thereof to the pontoon at an equidistant point along the perimeter of the pontoon, and adapted to be coupled on a top end to a deck structure. The diameter (23) from a center of the radial width of the pontoon is greater than a distance (21) from a center of one column to a center of an adjacent column.

主权项

1. An offshore floating structure for the drilling and production of oil and gas, said offshore floating structure comprising:
a generally circular toroidal, hollow pontoon of substantially a same radial width throughout a perimeter of the pontoon; and a plurality of columns of substantially a same cross-sectional area, each coupled, at a coupling point, on a bottom end thereof to said pontoon at an equidistant point along the perimeter of said pontoon, and adapted to be coupled on a top end to a deck structure; wherein a diameter from a center of the radial width of said pontoon is greater than a distance from a center of one said column to a center of an adjacent said column; and wherein at least one of: said distance from the center of one said column to the center of an adjacent said column is between 3.5 to 4 times as great as the width of one of said column, or a draft is between 0.3 to 1 times said distance from the center of one said column to the center of an adjacent said column.