McDermott delivers Ichthys RSS

McDermott delivers Ichthys RSS

McDermott International said that it has delivered the riser support structure for the Inpex-operated Ichthys LNG’s subsea umbilical, riser, flowline development.

“The completion of the RSS fabrication, load-out and successful installation is a major milestone,” said Tony Duncan, Executive Vice President Subsea.

The 7,200-ton RSS connects the field’s subsea infrastructure to a semi-submersible central processing facility. The RSS structure is comprised of a tower, more than 328 feet tall, with an arch 410-foot long also designed and fabricated by McDermott to be installed at a later date, to support 25 large-diameter flexible risers and dynamic umbilicals.

“The RSS accounts for more than 25% of the total 28,700 ton of subsea structures we are fabricating for Ichthys,” explained Duncan. “It is an integral piece of the subsea field architecture as all other subsea structures will be installed and oriented relative to its location.”

In addition to the RSS, the facility is undertaking the fabrication of subsea structures including the Flow Line End Terminations, In Line Tees, manifolds and riser bases.

The Ichthys project awarded to McDermott in 2012 includes EPCI and pre-commissioning of product flowline systems, a Mono Ethylene Glycol injection system, start-up condensate transfer and fuel gas transfer flowline systems, control systems and other associated SURF elements in waters up to 900 feet. McDermott will also install mooring systems for the Floating Production, Storage and Offtake vessel and Central Processing Facility as well as engineering for future flowlines, risers and umbilicals.

Press Release; Image: McDermott

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