WOODSIDE Energy Ltd on behalf of the North West Shelf Venture, today announced the award of two major contracts for the Venture’s US$440-million second trunkline project. Thiess Pty Ltd has been awarded contract in excess of US$5.5million to supply gravity anchors to secure the trunkline to the seabed, and Bos Australia Pty Ltd has been awarded a contract in excess of US$1 million to fabricate a structural steel skid structure containing isolation and commissioning valves.
Thiess will construct about 900 32-tonne pre-cast concrete gravity anchors for installation over the deepwater section of the trunkline at intervals varying from 50-150m. The anchors, which use high-density concrete mixed with iron ore aggregate, will be constructed at the Venture’s King Bay Supply Base, near Dampier in Western Australia, and will involve a workforce of approximately 50 people.
Bos will fabricate and system-test the skid structure at its Kwinana workshop. The skid structure will weigh more than 300 tonnes and is scheduled for installation in July 2003 on the seabed next to the North Rankin A gas production platform.
The second trunkline, which is scheduled to be completed in Q1 2004, will parallel the existing 40-in, 140-km long pipeline, and link the Venture’s offshore gas production facilities and its onshore gas processing facilities, near Karratha in Western Australia. It will form an integral part of current expansion of the Venture’s gas production and liquefaction facilities, which includes the construction of a fourth liquefied natural gas processing train and associated infrastructure. The new pipeline will provide extra capacity to supply existing Japanese and Western Australian customers, as well as for prospective gas-related projects on the Burrup.
The six equal participants in the North West Shelf Venture are Woodside Energy Ltd (operator), BHP Billiton Petroleum (North West Shelf) Pty Ltd, BP Developments Australia Pty Ltd, Chevron Australia Pty Ltd, Japan Australia LNG (MIMI) Pty Ltd, and Shell Development (Australia) Pty Ltd.