Legacy Field Upgrades - Production Control System Lessons Learnt

Abstract

This paper describes examples of functionality and equipment limitations encountered during the subsea field operational phase, and practical solutions to eliminate the limitations. It addresses changes and upgrades required to hydraulic, chemical and electric infrastructure. Modifications and upgrades, such as retrofit sensors, retrofit electric actuators, bypass connections and digital soutions are described. How a holistic obsolescence strategy can modernize the subsea functionality and let different generation systems coexist is further described.