oil drilling, production, storage and discharge vessel

摘要

a hulled oil drilling, production, storage and unloading vessel, a main deck, an upper cylindrical side section extending down from the main deck, an upper frustoconical side section, a neck cylindrical section, a section lower ellipsoidal extending from the cylindrical section of the neck and a fin-like appendage attached to a lower portion and an external portion of the exterior of a lower surface. the upper frustoconic side section located below the upper cylindrical side section and maintained to be above a waterline for a transport depth and partially below the waterline for an operational depth of the oil drilling, production, storage and unloading vessel .