UTEC Survey (Australia) Pty Ltd was awarded a contract by Saipem for offshore survey and positioning services during the pre-lay, lay and post-lay installation of a 42-inch, 889-km pipeline that will connect the INPEX operated Ichthys LNG project’s offshore central processing facility situated 200 km off the coast of Western Australia with its onshore gas processing plant near Darwin in Australia’s Northern Territory.
To be installed in depths up to 275 meters, the pipeline is reported to be the longest subsea gas pipeline in the Southern Hemisphere and the fifth-longest in the world.
Offshore activities will see UTEC providing survey and positioning services on a range of Saipem-owned and chartered vessels. Pre-lay survey works will be carried out from the Go Explorer, which will provide touch-down monitoring support to the pipelay barges. The Semac-1 will start pipelay at the Darwin end and lay 150 km of the 42-inch pipe before Saipem’s pipelay vessel Castorone completes the pipelay out to the Ichthys field.