Excalibur Engineering bv provides a safe and cost effective approach to the removal of large oil and gas offshore
platforms. It will commission a dedicated vessel, Pieter Schelte, with the capability to remove platform topsides of
up to 48,000 tonnes (53,000 sh.t.) and jackets up to 25,000 tonnes (28,000 sh.t.) in a single lift operation.
In addition to platform removal, Pieter Schelte can also be used for platform installation.
Detail engineering has started, and tankers suitable for conversion will be acquired in due course.
Delivery of the vessel to the market is set for 2006.
The conversion of two 300,000 DWT tanker hulls provides the basis for Pieter Schelte, a catamaran type vessel with the following principal dimensions:
Length: 345 m / 1130 ft
Width: 118 m / 387 ft
Depth: 28 m / 93 ft
Slot width: 52 m / 171 ft
Enlarged slot width: 77 m / 253 ft
Slot length: 114 m / 375 ft
The overall size of the vessel provides considerable stability, allowing removal operations to be undertaken in relatively severe sea conditions. A hydraulic motion compensation system further improves vessel workability by eliminating load impacts during topsides removal operations.
Topsides are lifted in one piece at their natural strong points. The topsides lift system will attach to the legs of the module support frame of the topsides. Jackets can also be removed in their entirety by lifting and tilting them onto the deck of Pieter Schelte.