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Seabed preparations, PGN

The pipeline between Pulau Pemping, Indonesia, and Pulau Sakra, Singapore, is the final link of the transportation system for natural gas from onshore fields on South Sumatra to Singapore. The successful completion of the Engineering, Procurement and Construction contracts for the 27-kilometers 28-inch gas pipeline with a 96-core fibre optic cable in one of the busiest ports and shipping traffic zones of the world marked a milestone for Boskalis. The scope of work comprised not only seabed preparations and protective rock berm installation - Boskalis Offshore core activities - but also pipeline manufacturing and installation.

The following comprehensive scope of work has been completed on a lump sum basis in two countries, with two clients and under three different contracts:

  • Construction of two landfalls: a cofferdam and 200-meters pipe pull at Pulau Sakra and a trench in shallow reef with 700-meters pipe pull at Pulau Pemping.
  • Seabed preparation for pipe lay: trench dredging and seabed levelling.
  • Procurement and installation of 28-inch concrete coated line pipe, grade X-70, and 96-core double armoured fibre optic cable.
  • Design verification of both a rock berm (drop and drag of 22-tonnes anchors in Singapore waters) and its filter layer (impact on cable of falling rock).
  • Procurement of 2,150,000 tonnes of rock armour and filter material and installation over a length of 25 kilometers.
  • Hydro-testing, drying and precommissioning of pipeline system.

Related projects

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Ineos IRM 2018

Boskalis Subsea Services was contracted by INEOS E&P A/S for the 2018 Inspection, Repair and Maintenance (IRM) campaign, involving the preparation and execution of 20-off scopes on various assets.

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Haven Jack-up upgrade

The Master Marine accommodation unit HAVEN required an upgrade for operations at the Johan Sverdrup Field.

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DNO Oman block 8 LTD

DNO Oman Block 8 Ltd (DNO) is the operator of the Bukha Field, offshore Khasab, Oman. DNO entered Oman in 2012 and operates the country's only producing offshore fields on behalf of Omani Oil & Gas ministry. Boskalis Subsea Services (BSS) in recent years have assisted DNO with lifting a flare boom onto the WB Platform, making use of a DP2 offshore vessel, also Boskalis provided diving and inspection services to DNO for their SPM Offshore RAK, UAE.

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Transport and installation Aasta Hansteen
spar platform

For the Statoil Aasta Hansteen project, Dockwise has transported the newbuild spar hull from the HHI fabrication yard in Ulsan, South Korea to the offshore discharge location near Høylandsbygd, Norway. The spar is the world’s largest spar ever built to date. 

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Transport and installation turbine foundations offshore wind farm, Wikinger

The Wikinger offshore wind farm has been developed by Iberdrola in the Baltic Sea area, within the German Exclusive Economic Zone (EEZ). The offshore site is about 34 km northeast of the island of Rügen, and covers an area of roughly 50 km², within which 70 wind turbine generators (WTG) of 5 MW and one offshore substation (OSS) are being installed. The water depths for installation range between 36 and 42 meters. When completed the windfarm will deliver 350 MW electrical power to the German national grid. The transport and installation of the 70 WTG foundations and the piles for the OSS has been carried out by Boskalis.

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Offshore wind farm
monopile installation,
Veja Mate

Boskalis is close to completing one of its latest and most significant offshore wind projects - Veja Mate, in the German North Sea. The project involves handling and installing the biggest monopiles in the industry – weighing between 1,230-1,302-tonne a piece – using the biggest pile gripper frame and pile driving hammers in the industry with a brand new vessel, which also happens to be the biggest in the sector. Once complete, the offshore wind farm will produce over 1,6 TWh of green, renewable electricity annually.