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Installation of a 262-kilometre export pipeline that will connect the Barossa field development to the future Darwin Pipeline Duplication and transport natural gas to the Darwin LNG facility in Australia’s Northern Territory.
Company: Santos
Location: Offshore Darwin, NT, Australia
Water depth: 254 metres
Largest ever S-mode PLET installation by Audacia
Supply chain stretching thousands of kilometres
Scope of work
- Installation of 262-km, 26-inch carbon steel export pipeline, with external anti-corrosion & concrete coating & internal flow coating
- Procurement of line pipe
- Coating of line pipe
- Design, fabrication & installation of 2x PLETs
- Pipeline route optimisation & mattress installation at crossing locations
- Detailed design of span assessment & installation of span correction materials
- Pre-commissioning activities (flooding, cleaning, gauging & hydro-testing)
- Post-lay & as-built surveys
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Specials & challenges
- First project in NT Australia / Timor Sea
- Supply chain stretching thousands of kilometres (Kuantan, Malaysia to Darwin)
- Extreme tidal fluctuations (7 metres) & extreme weather conditions
- Largest ever S-mode PLET installation by Audacia
- Project delays resulting from legal challenge to the pipeline route, causing rescheduling of offshore works during vessel mobilisation
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