Dredging for Oil and Gas · 12/3/2013 · Dredging for Oil and Gas CEDA UK Seminar Dredging for the Offshore Industries ICE London, 3 December 2013 Offshore and EPC Contractors Paul

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Dredging for Oil and Gas CEDA UK Seminar Dredging for the Offshore Industries ICE London, 3 December 2013

Offshore and EPC Contractors

Paul Hesk Regional Manager – Middle East, India and Africa Van Oord Offshore bv

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Recent Investments

Company Profile

Leading international contractor, specialising in:

• Dredging and Reclamation

• Offshore Oil and Gas

• Marine Engineering

• Offshore Wind Farms

• Infrastructure

• Soil Improvement


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Oil and Gas Sector Related Activities

• Dredging and Reclamation

• Trenching and Backfilling

• Pipeline (and Cable) Installation

• SPM System Installation

• Subsea Rock Installation

• Protection and Stabilisation of Pipelines, Cables and Structures

• Ballasting of Structures

• Scour Protection

• GBS Installation


© Copyright Van Oord | 2012 4

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In presentation-modus:

Dredging and Reclamation

Das Island, United Arab Emirates

• New platform for airport extension and accommodation

• 160 km offshore

• 16 million m3 sand (including soil improvement by vibro-compaction)

• 7 km of revetment

• 3.5 million tonnes Rock

• 140,000m3 Concrete

• 39,000 No. X-blocks


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Trenching and Backfilling

Typical Equipment Types:

• Trailing Suction Hopper Dredgers

• Cutter Suction Dredgers

• Backhoe Dredgers

Selection Criteria:

• Soil Properties

• Water Depth

• Disposal Area

• Environmental Considerations

Shallow to Deep Water

Near Shore



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Pipeline Installation


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On-bottom Pull The pipeline is pulled from an onshore stringing yard into the water with the aid of Linear Pulling Winches mounted on an offshore construction barge.



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Pipeline Installation – Bottom pull

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Pipe Lay In the near shore area, the pipeline is pulled from a Shallow Water Lay Barge moored offshore to the shore with the aid of Linear Pulling Winches.

In deeper water, the pipeline is installed on the seabed by a Shallow Water Pipe Lay Barge.




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Shallow Water Pipe Lay Barge

• Shallow water applications (up to 100m)

• 6” to 60” diameter pipe

• 7 Stations:

• 3 Welding

• 1 Non Destructive Testing

• 3 Field Joint Coating


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Single Point Mooring (SPM) System Installation

• Pipe Line End Manifold (PLEM) Installation

• CALM Buoy Installation:

• Subsea and Floating Hoses (including Umbilicals)

• Anchor and Chains

• Mooring Hawser



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Subsea Rock Installation

• Stabilisation

• Free-span Support

• Pre-lay

• Post-Lay

• Crossings

• Upheaval Buckling Mitigation

• Protection

• Anchors

• Dropped Objects

• Spudcan Pugmark Filling

• GBS Related Applications


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From the Archive……..



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Flexible Fall Pipe Vessels

• DP-2

• Highly accurate installation

• Large capacity (up to 28,000 tonnes)

• Installation in water depths of up to 1,200m

• Ability to work close to live structures



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Side Stone Dumping Vessels

• DP-2

• Accurate installation in water depths of up to 50m

• Ability to work close to……



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Side Stone Dumping Vessels

…… or under live structures


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Pipeline Stabilisation


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Trench Backfilling



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Thermal Insulation


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Free-span Correction



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Pre and Post Lay Installation


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Crossings



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Upheaval Buckling Mitigation


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Anchor Protection



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Dropped Objects


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Infill of Spudcan Pugmarks



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Gravity Based Structure (GBS) installations

• Sea Bed Preparation

• Tow Out

• Sinking

• Ballasting

• Scour Protection


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Seabed Preparation



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Tow-Out and Sinking


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Ballasting



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Scour Protection


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Chapter title

Thank you for your attention

Are there any questions?


Documents

Dredging for Oil and Gas · 12/3/2013 · Dredging for Oil and Gas CEDA UK Seminar Dredging for the Offshore Industries ICE London, 3 December 2013 Offshore and EPC Contractors Paul