Download - Heerema - Pieter Schelte
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The 11thNPF North Sea Decommissioning Conference
Edward Heerema, Allseas
15 February 2011
Single Lifters
The Pieter Schelte project - update
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183 m
225 m
111 m
81 m
382 m1253 ft
738 ft
600 ft
364 ft
266 ft
300 m
984 ft
Tog Mor
Audacia
Lorelay
Manta
Calamity Jane
Pieter Schelte
Solitaire
Profiles of Allseas vessels
151 m495 ft
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183 m
225 m
151 m
111 m
81 m
382 m1253 ft
738 ft
600 ft
495 ft
364 ft
266 ft
300 m
984 ft
Tog Mor
Audacia
Lorelay
Manta
Calamity Jane
Pieter Schelte
Solitaire
Profiles of Allseas vessels
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New-build designSelf-propelledDynamically positionedTopsides lift system at the bowJacket lift system aft
S-lay pipelay, stinger in slot
Platform installation / decommissioningand pipelay vessel Pieter Schelte
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1987 1999
2004 2007 2008
1987
History of the Pieter Schelte concept
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382 m
117 m
122 m
52 m
66,000 kW (88,500 hp)
= 12 x 5,500 kW
95,000 kW (127,000 hp)
14 knots
37,000 t/h
571 persons
Hull length:
Hull width:
Slot length:
Slot width:
Thruster capacity:
Installed power:
Transit speed:
Ballast capacity:
Accommodation:
Platform installation / decommissioningand pipelay vessel Pieter Schelte
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48,000 t
25,000 t
Heavy lift capacities of Pieter Schelte
Topsides lifting:
Jacket lifting:
Single-lift installation and removal of
Steel jacket-based platforms,Topsides of gravity based structures, and
Topsides of floating platforms, notably SPARs
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6 Boeings 747-400
Pieter Schelte is a unique vessel; in size
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and in capacity
Able to lift 2.5 Eiffel Towers at once
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Capacity of forklift units: 7,000 t each
(with friction clamps: 6,000 t each)
Topsides lift system
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Pieter Schelte versus one of the largeexisting SSCVs
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Lifting a drilling derrick
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Detail design
Hull and superstructure
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Detail design
Pipe systems
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March 2007 Long-lead items (power plant, thrusters, DP system)ordered
June 2008 Basic design of the hull completed;High-tensile steel for the lift systems ordered
Early 2009 Basic design of the lifting systems completed;Detail design started in advance of the building contract
June 2010 Detail design of the hull completed
Building contract of the hull and lifting systems awarded to Daewoo
2013 Delivery of the completed ship
Development schedule of Pieter Schelte
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Typical block fabrication by Daewoo
Block assembly
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Assembly of the starboard ship
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Assembly of the PS and SB hulls and accommodation
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Erection sequencefloating dock No. 3
The portside super blockswill be erected in floatingdock No. 3 by a floating
crane of 3,600 t from pre-erection stage (G2)
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Assembly of the topsides lift system
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Installation of the topsides lift system
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Maximum safety to personneldue to minimised offshore work
Maximum protection of the environmentdue to moving all decomposing work to shore
Minimum offshore preparatory work
Minimum subsea cutting operationsusually clearing to the seabed in a single lift
Advantages of large single-lift vesselsin platform removal
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Challenges for single-lift vessels
Of the 500 structures to be removed in the North Sea, most aresmall and can be removed with traditional crane vesselscompetitively.
Because of swift operation, there is room in the decommissioningmarket for only one single-lift vessel for very large lifts.
Single-lift vessels can compete very well against SSCVs
on cash cost, but their depreciation element bears heavily on theprice level for removals. Nevertheless, on large platform removals,single-lift vessels should be able to be very competitive.
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Pieter Schelte brings major improvements for
removal and installation of large oil and gas platforms, being thefirst vessel which enables large single-lift operations;
installation of larger pipelines in deeper water.
Removal of large platforms will be executed in an ecologically cleanermanner than was possible so far.
Safety to personnel working offshore will greatly be enhanced.
Pieter Schelte will partly create its own market by moving presentboundaries.
Conclusion
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Platform installation / decommissioningand pipelay vessel
Pieter Schelte