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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

Selected filters
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Transport and installation Moho Nord FPU

For the Total Moho Nord FPU project, Dockwise has transported the newbuild FPU Likouf from the HHI fabrication yard in Ulsan, South Korea to the offshore discharge location near Port-Gentil, Gabon. It was a world-record cargo load onboard a semi-submersible vessel to date. 

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Installation topside
and living quarters,
Thien Ung BK-TNG

For the Vietsovpetro Thien Ung project, Boskalis has installed the Thien Ung BK-TNG 4,200 metric tonne (mt) topside and 850 mt living quarter by offshore heavy lifting with the sheerleg Asian Hercules III. It was the world’s heaviest lift installation of a topside by a sheerleg in an offshore environment to date. 

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Development gas export pipeline, Ichthys

The Ichthys development revolves around the construction of a new 42-inch deep sea natural gas pipeline from the Ichthys field in the Browse Basin 880 kilometers to Darwin onshore. The pipeline will run through the Darwin harbor, requiring dredging services in the near shore area, rock installation and the construction of a landfall. Owner INPEX Operations Australia Pty Ltd is developing LNG process facilities on Blaydin Point near Darwin, Northern Territory of Australia.

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Wintershall RAVN and A6-A

Wintershall Noordzee B.V. installed a new remote platform RAVN as a crude production tie-back to A6-A. RAVN is a remote and unmanned crude well unit. Utilising a dry-tree design, all control, power and metered injection for the well will be via the 18.2-km control umbilical between the new satellite platform RAVN in the Danish sector and the operational platform A6-A in the German sector.

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Dry transport,
FPSO Armada Intrepid

The Armada Intrepid, which is owned by the Malaysian company Bumi Armada, is an FPSO (Floating Production, Storage and Offloading) vessel which needed to be dry transported from Rotterdam (Netherlands) to Batam (Indonesia) on the Dockwise Vanguard. The FPSO is 245 m long and weighs 60,000 metric tons. The DWV (275 x 70 m) has a deadweight of 117,000 metric tons.

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Mooring replacement phase 2, Zafiro Producer

Mobil Equatorial Guinea Incorporated, an affiliate of ExxonMobil, entered into a contract with Boskalis for the Zafiro Producer Mooring Replacement Project Phase 2. The Zafiro Producer is installed in 180 m (590 ft)water depth approximately 74 km (40 nauticalmiles) west of Malabo, Equatorial Guinea.