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Rugged Hydraulics
Safely Lift 900 Anchors for Australia's Largest Oil And Gas Project
Hydraulic technology engineered to deliver safe, reliable and precise power in challenging environments has been used in the laying of a 80km string of subsea pipeline anchors off Australia's north-west coast.
A high-pressure (700 bar) hydraulic system from Enerpac was custom-built for two anchor feed beds used to lift and position the 32 t anchors for lowering by shipboard crane to the ocean floor.
"Reliable, punctual performance was critical to this project because of the benefits flowing from the work" said Enerpac Territory Manager Bill Henderson.
Safety was a keynote of all equipment specified by TCS7 for each stage of the Gravity anchor installation, which began with the anchors being winched into lifting position in travelling anchor frames that moved along the length of the vessel.
"The hydraulic systems involved were designed for rugged simplicity in an aggressive maritime environment where they could be operating 24 hours a day, seven days a week," said Mr. Henderson. "As with much of the Enerpac equipment used on resources sites in and around Australia, reliability is at a premium when you're in a remote situation hundreds of kilometres from support facilities. "Obviously also dealing with heavy weights on a ship poses its own safety issues, and optimum safety is a first priority of the global Technip organization." The scope of the Technip and Subsea 7 project includes the tie-in of Woodside's second trunkline into the existing infield facilities near the North Rankin A platform, via hyperbarically welded and flanged spoolpieces and a 350Te valve manifold. The second trunkline work also includes the dewatering and condition of the trunkline and stabilization of the trunkline by installation of the approximately 900 gravity anchors. After startup of the second trunkline, extensive pipeline system modifications to the existing first trunkline at North Rankin A Platform will be carried out. With a worldwide workforce of about 18 000, Technip ranks among the top five in the field of oil and petrochemical engineering, construction and services. Subsea 7 is one of the world's leading subsea engineering contractors with operations in UK, Norway, Asia-Pacific, Brazil, Gulf of Mexico, West Africa and Caspian. Enerpac is part of the Actuant Corporation, which has worldwide sales exceeding A$ 1 billion a year. The Australasian Enerpac operation has built an enviable reputation over more than 30 years through its in-house expertise coupled with an extensive distribution and service network.
Link to original article on Enerpac site
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