초록 ▼

A method for converting a single-hull tanker to a mid-deck configuration is disclosed. The midship cargo section of the tanker is cut longitudinally along a horizontal plane well below the normal laden water line. A spacer member including a new transverse mid-deck is interposed between the lower an

A method for converting a single-hull tanker to a mid-deck configuration is disclosed. The midship cargo section of the tanker is cut longitudinally along a horizontal plane well below the normal laden water line. A spacer member including a new transverse mid-deck is interposed between the lower and upper portions of the midship cargo section. The port and starboard outer sections of the midship cargo section of the vessel are cut longitudinally away from the central portions of the midship sections of the vessel, and new longitudinal bulkheads are added. In this way the vessel is provided with port and starboard wing ballast tanks between the hull plating and the port and starboard wing cargo tanks. The center cargo tank is also divided the upper and lower sections, such that the lower section can be converted to ballast in the event double-hulled tankers become mandatory for oil transport.

대표청구항 ▼

A method of reconstructing a tanker having a bow section, a stern section, and a midship cargo section, said midship cargo section including hull bottom plating, deck plating, port and starboard outer plating, continuous port and starboard longitudinal bulkheads, and a plurality of continuous transv

A method of reconstructing a tanker having a bow section, a stern section, and a midship cargo section, said midship cargo section including hull bottom plating, deck plating, port and starboard outer plating, continuous port and starboard longitudinal bulkheads, and a plurality of continuous transverse bulkheads, whereby a plurality of center cargo tanks are formed between said port and starboard longitudinal bulkheads, said transverse bulkheads, and said bottom and deck plating, a plurality of port wing cargo tanks are formed between said port outer plating, said port longitudinal bulkhead, said transverse bulkheads, and said bottom and deck plating, and a plurality of starboard wing cargo tanks are formed between said starboard outer plating, said starboard longitudinal bulkhead, said transverse bulkhead, and said bottom deck plating, said method comprising the steps of: (1) separating a lower portion of the midship cargo section from an upper portion thereof by: (a) cutting said port and starboard outer plating apart along horizontal cutting lines extending the length of said midship cargo section; (b) cutting said continuous port and starboard longitudinal bulkheads apart along horizontal cutting lines extending the length of said midship cargo section; and (c) cutting each of said continuous transverse bulkheads apart along horizontal cutting lines extending transversely across said midship cargo section; (2) cutting said bow and stern sections free from said upper portion of the midship cargo section, and elevating said upper portion of said midship cargo section with respect to said lower portion thereof; (3) inserting a spacer member between said separated upper and lower portions of said midship cargo section, said spacer member including new insert sections of said port and starboard outer hull plating, of said port and starboard longitudinal bulkheads, and of said transverse bulkheads, said spacer member further including a new horizontal mid-deck; (4) welding said separated lower portion of the midship cargo section to a lower longitudinal edge of said spacer member, and said separated upper portion of the midship cargo section to an upper longitudinal edge of said spacer member; and (5) welding said upper portion of said midship cargo section to said bow and stern.