| 摘要 |
<p>A shallow draft floating offshore drilling/producing structure (10) is formed from a buoyant hull (12) on which one or more modules or decks may be placed to support process equipment, a drilling rig, utilities, and accommodation for personnel. Drilling and/or producing is accomplished through a centre well (22) in the hull (12). The hull (12) includes a section (14) for ballast, an oil storage area (16), and voids and variable ballast (18) for offsetting the lighter weight of the stored oil. The hull (12) is designed to have a relatively small water plane area. The hull (12) is also designed to have roll and pitch periods that are detuned from waves in the area that the hull is to be installed. <IMAGE></p> |
