IMR Heaven - IMR Ready Retrofittable Cathodic Protection System for Offshore Brownfield Fleets
by Jim Britton
Despite the decreasing number of structures, the offshore brownfield infrastructure in the Gulf of Mexico remains a significant energy resource. Some key things have changed in recent years, however:
- Integrated IMR (Inspection, Maintenance & Repair) programs offer a cost-effective model to maintaining aging assets. This is achieved by integrating a range of offshore tasks to a single vendor for a period of time, thus optimizing vessel and diving resource costs.
- Many structures are now approaching the end of their useful lives.
- The majority of structures have a permanent “for sale” sign on them.
Increasingly robust regulatory oversight, and the need to maintain structural and containment integrity on this infrastructure, cannot be ignored; but with a low commodity price, budgets are stretched.
Deepwater met this challenge by developing a low-cost, modular, retrofittable sacrificial anode system called RetroLink. Like all Deepwater solutions, this is elegant in its simplicity, reliability, and flexibility. To date, the technology has been successfully applied to approximately 750 offshore structures in the Gulf of Mexico and worldwide.
What is a RetroLink?
In order to achieve our design objective, we needed an anode system that had the following attributes:
- Able to deliver high current for a 5-6 year life
- Simple installation with no subsea assistance
- High degree of mechanical integrity
- Consistent electrochemical performance
- Low drag and good hydro-dynamic performance
- Modular design (field adaptable) and lightweight
RetroLink was born (Fig 1) below.