Multipurpose Offshore Construction Vessel

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Vuyk Engineering Rotterdam B.V.

Naval architects, Marine engineers, Consultants

Functionalities

The Vuyk Versatile Vessel (VVV) is developed by Vuyk Engineering Rotterdam to anticipate on the future demand of the offshore market. To serve the offshore

industry, the vessel can be fitted with a wide range of equipment that is partly designed as modular systems. This reduces mobilization time and has the advantage for contractors to use this equipment flexible within the fleet.

For multi purpose use, the vessel has the capability to submerge and load floating deck equipment or cargo. This possibly reduces costs as mobilization can be

combined with heavy transport projects.

General

The VVV is a dynamically positioned construction vessel suitable to perform a wide variety of operations:

• Installation and construction for oil and gas industry - Heavy lifting

- Subsea installation

- Pipe and reel lay operations - Moonpool operations

• Installation and transport of wind turbines

• Float on / Float of operations of equipment (and cargo) • Offshore support

• Heavy transport

• Optional: Bridge Installation

Due to the versatile functions, the vessel can execute projects which normally require a combination of several specialized ships.

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P.O. Box 1, De Linie 7

2900 AA Capelle aan den IJssel

Cargo Capacity

Deck area

Deck load Payload m2 ton/m2 ton 4700 15.00 10000

Lifting Equipment

2x Heavy Lift Crane

Lifting capacity

Lifting height above water level Longboom

Lifting capacity

Lifting height above water level

ton m ton m 2x 1500 90 800 240 The vessel is fitted with two heavy lift mast cranes which gives the advantage of controlled tandem hoisting with maximum load and redundancy for single crane operations. The arrangement of the cranes also provides space for modular equipment and deck load to be positioned and operated between the cranes.

Optionally the vessel can be fitted with a longboom, used for installation of bridges and civil constructions.

Principal dimensions

m m m m m m m m ton p Length o.a. Length b.p.p. Breadth, moulded Depth, moulded Draught sailing Draught lifting Submerged draught

Water level above deck in submerged condition Deadweight Accommodation 161.50 147.50 42.00 14.50 7.50 8.50 22.50 8.00 14000 50

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Modular Equipment

The vessel can be fitted with following modular equipment: - J-Lay equipment

- Reel lay equipment - Trenching equipment

The vessel is self supporting with respect to fitting and dismounting the modular equipment. This can be done by lifting the equipment to deck, skidding/rolling onto the unobstructed deck, or submerging the vessel when using floating modules.

Modular

Accommodation

The standard accommodation is suitable for 50 persons, including ship's crew. In most cases this is not sufficient for working with modular equipment. To expand the accommodation capacity, the vessel can be fitted with a modular accommodation unit for 100 persons. This unit is self-floating so it can be floated on the submerged vessel. Positioned directly aft of the forecastle, a large deck remains for fitting equipment and storage of pipes/product.

This module provides more flexibility, as during transport maximum free deck area is available, while during installation work the accommodation capacity is increased

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The vessel consists of a mono hull fitted with a large forecastle and buoyancy casings to generate the submersible functionality. On the aft buoyancy casings two heavy lift mast cranes are fitted. This location minimizes “loss” of deck space by the crane pedestals .

The deckhouse is positioned on the forecastle deck where it provides a perfect overview on the large workdeck aft. Below deck the engine room, thruster rooms, forward pump room and all required service spaces are located.

The midship consists completely of ballast and fuel tanks. For access two corridors from forward to aft are arranged. Also a moonpool is fitted in the midship area as the motions of the vessel are lowest in this region. This location contributes to a higher workability through the moonpool. The moonpool can be closed at deck so an unobstructed deck is available for installation and transport projects.

In the aftship the propulsion room and aft pump room are located in between the crane pedestals. The adjacent spaces below the buoyancy casings can be used for extra winch capacity for the mast cranes.

Arrangement

In order to reduce the resistance of this relatively wide vessel, the midship coefficient is minimized by a sloped side. This has the advantage of a smaller waterline at sailing draught and the maximum waterline breadth at lifting draught.

The foreship is fitted with a bulbous bow to achieve lower resistance in free sailing conditions. The bow is designed with a V-shape with little flare, to minimize bow impact. The aftship has a mild V-shaped bottom which, in combination with the sloped sides, provides good flow to the propellers.

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Machinery

Main generator sets Auxiliary power

kW kW 4x 4300 1x 1500

A setup of four similar generator sets is chosen. Depending on the operation three or four sets are in use. During dynamic positioning operations this configuration

provides sufficient redundancy to ensure positioning of the vessel, in case of failure of one generator set.

Power Generation

A diesel-electric propulsion and power generation system is favourable as the power demand varies in the different operating conditions. This system minimizes fuel consumption while availability of power is preserved.

The vessel is equipped with a sophisticated propulsion system. This system is balanced for the power requirement in free sailing conditions and during dynamic positioning . The system consists of following propellers:

Propulsion

Aft azimuth thrusters Fwd azimuth thrusters Fwd tunnel thruster kW kW kW 3 x 3350 3 x 2200 1 x 1600 With the aft propellers in use, the vessel can reach a service speed of 14 knots. A class 2 dynamic positioning system is fitted on the vessel.

The system is designed for the following environmental conditions with all propulsion equipment operating:

Significant wave height : 3 m Current speed : 2 knot Wind speed : 6 Bft.

Dynamic Positioning

DP capability plot

(ma x. sig. w ave height)

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350

All thrusters operating

FWD C thruster f ailure

AFT PS thruster f ailure

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Construction vessels require superior seakeeping behaviour to achieve maximum workability. Therefore this vessel is fitted with large bilge keels and passive anti-roll tanks in the hull.

Depending on the operational area and type of work the workability of the vessel can be determined. Depending on the loading condition, the anti-roll tanks are adjusted for maximum effect.

Figure below gives a workability plot for a J-lay operation in the Gulf of Mexico.The workability for 3 headings is shown by the coloured lines through the scatter table.

Workability

Condition - Modular J-lay Equipment

Limits Area 32 - Gulf of Mexico Workability

Pitch angle : N.A. deg Heading 180 deg : 100%

Roll angle : N.A. deg Heading 150 deg : 97%

X-acceleration : 2.00 m/s2 Heading 90 deg : 82%

Y-acceleration : 1.50 m/s2 Z-acceleration : 2.50 m/s2 WORKABILITY -0 2 20 261 0 1 6 40 230 1139 6141 16733 5573 1734 435 92 17 3 16195 8299 3513 1143 306 70 14 8965 6413 3419 1344 426 114 26 3594 3359 2142 971 349 104 27 1187 1383 1016 515 203 66 18 348 488 403 223 94 33 10 95 156 142 84 38 14 4 25 47 46 29 13 5 2 6 14 14 9 5 2 1 2 4 4 3 1 1 0 0 1 1 1 0 0 0 0 0 0 0 0 0 -0 0 0 -0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Tz (sec) H s ( m ) 180 deg 150 deg 90 deg

Dynamic Positioning Class 3

To provide more redundancy the DP system can be upgraded to a class 3 system. This can be achieved by dividing the engine and propulsion rooms into watertight zones. The electrical system must be divided into fire zones to generate redundancy after flooding or fire in any compartment.

This concept is developed as starting point for further specification on clients require-ments. These will be incorporated in the basic design to follow.