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Installation of largest diameter (44-inch) pipeline in Australian waters, part of major new system connecting the Wheatstone development with the nation’s first liquefied natural gas (LNG) hub in Onslow, Western Australia.
Company: Chevron Australia
Location: Northwest Shelf, Western Australia
150 m
Max. water depth
Scope of work
- Installation 220-km, 44-inch concrete-weight-coated (CWC) export pipeline
- Installation 34-km, 24-inch CRA-clad production pipelines
- Installation 34-km, 14-inch CRA-lined utility pipelines
- Installation 34-km, 6-inch carbon steel MEG flowlines
- Design, fabrication & installation of subsea structures (incl. 14x PLET, 6x ILTs, ~40 counteracts)
- Flooding, gauging & testing (FGT) of pipeline system
220-km, 44-inch
concrete-weight-coated (CWC)
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Specials & challenges
- Installation of largest & heaviest offshore diameter pipeline (44-inch) in Australian history
- Above surface tie-in of 44-inch CWC trunkline
- Complex flowline installation scope with multiple startups & laydowns
- Multiple crossings with existing live lines
- Shore pull-in through micro-tunnel
- Design & fabrication of ILTs & PLETs
- CRA welding scope with extensive NDT programme
44-inch
CWC trunkline is above surface tie-in
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