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

Heerema - Pieter Schelte

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