South Pass 62-C
Two RetroBuoy™ systems replace spent anodes on a 330 ft platform in the Gulf of Mexico
Deepwater installs 2 RetroBuoy™ systems on Gulf of Mexico platform
Deepwater Corrosion Services, Inc. recently retrofitted an eight-leg, fixed steel jacket in the Gulf of Mexico with two RetroBuoy™ impressed-current cathodic-protection (ICCP) sleds. Sitting in about 330 feet of seawater, the platform’s CP life will be extended by 20 years. Each RetroBuoy™ system comprises:
• One RetroBuoy™ sled
• One Transformer-Rectifier (TR) power unit, which is installed topside
• One power cable between the RetroBuoy™ and TR
Installation time: 30 hours
The RetroBuoys™ and their cables (terminated dockside in Carlyss, LA) were loaded onto the back deck of the dive support vessel and taken to the platform. Using saturation divers, the RetroBuoys™ were installed on the seabed about 175 feet south of the base of the jacket.
The subsea cables were slowly unreeled and landed on the seabed in a figure-8 near the jacket base. The platfom had a J-Tube available to pull the cables for both RetroBuoys™ through the splash zone.
Both RetroBuoys™ and cables were installed subsea in less than 30 hours.
Gallery
Onboard
Crane loading the Retrobuoy and cable on deck to the installation vessel.
Aging structure
The platform requires an additional 20 years of anode life.
Rectifiers
One transformer rectifier to power each Retrobuoy system.
Overboard
Deploying RetroBuoy in the Gulf of Mexico.
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