PanYu 30-1

Deepwater installs RetroBuoy ICCP system to protect platform in South China Sea

Deepwater Corrosion Services was contracted to extend the life of a platform by installing Deepwater’s proprietary RetroBuoy™ impressed-current cathodic protection (ICCP) retrofit system. The platform is located in 200 meters of seawater in the Pearl River Mouth Basin. This production platform is an eight-legged fixed jacket with one conductor well bay and multiple pipeline risers and J-tubes. Some of these J-tubes remain empty, and one of them was used as a conduit to pull the RetroBuoy™ system’s cable through from subsea to topside.

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What was installed 

Four RetroBuoy™ ICCP anode sleds, subsea power cables, four transformer-rectifiers, topside junction box, topside DC cable, topside monitoring junction box and two DR-III™ monitoring systems. Prior to energizing the ICCP system, a baseline drop cell CP survey was performed to assess platform potentials. The potentials ranged from (-)1.018mV to (-)1.020mV at the top of the platform.