RetroPods™ installed on FPU subsea equipment
Wellheads and gravity bases protected by RetroPods™
![Large photo fpu](/media/6016/prb-9632-fpu-wide.webp?width=1296&height=0&mode=crop)
Operator of FPU in Vietnam has RetroPods™ installed to protect subsea trees and the gravity bases of offloading buoy and mid-depth buoys
Deepwater was contracted to supervise the installation of a cathodic protection (CP) anode retrofit system and perform continuity checks on RetroPods™ and Web-RetroClamps™ for six subsea trees and the clump-weights (gravity base) of an offloading buoy and mid-depth buoys (MDB).
A total of twelve RetroPod™ 10-year anode systems with eighteen (18) Web-RetroClamps™ (electro-mechanical tie-back clamps) were installed. Six clamps were for the subsea trees and twelve for the clump-weights (which includes three clamps damaged by ROV and during placement of the RetroPods™). Note: Each RetroPod™ was attached with two Web-RetroClamps™; one of the clamps was for redundancy purposes hence, the CP system was working very well. CP readings were taken on the clamp and the adjacent member using a contact probe much later after installation. It was highly recommended that a potential survey be taken 90 days after the installation as the structures may not have fully polarized at the time of install. Such a survey will help to verify adequate cathodic protection of the structure.
In conclusion, the RetroPod™ anode system was installed and deemed successful based on the potential shift as observed in the CP readings recorded after installation.
![Clamp close](/media/6018/prb-9632-clamp-close.webp?width=538&height=359&mode=crop)
![Pod deck 2](/media/6024/prb-9632-pod-deck2.webp?width=538&height=359&mode=crop)
![Mat pouring 2](/media/6022/prb-9632-mat-pouring2.webp?width=538&height=359&mode=crop)
![Pod lift](/media/6025/prb-9632-pod-lift.webp?width=538&height=359&mode=crop)
![Pod lift 2](/media/6026/prb-9632-pod-lift2.webp?width=538&height=359&mode=crop)
![Pod seabed](/media/6027/prb-9632-pod-seabed.webp?width=538&height=359&mode=crop)
![Clamp ROV](/media/6020/prb-9632-clamp-rov.webp?width=538&height=359&mode=crop)
![Pod deck](/media/6023/prb-9632-pod-deck.webp?width=538&height=359&mode=crop)
![Clamp close 2](/media/6019/prb-9632-clamp-close2.webp?width=538&height=359&mode=crop)
![Pods deck](/media/6028/prb-9632-pods-deck.webp?width=538&height=359&mode=crop)
![Mat pouring](/media/6021/prb-9632-mat-pouring.webp?width=538&height=359&mode=crop)
![Clamp very close](/media/6031/prb-9632-clamp-very-close.webp?center=0.5925,0.50666666666666671&width=538&height=359&mode=crop)