A feasibility study of how ROV technology can be used to challenge traditional subsea intervention and completion control systems
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- Konfidensielt 
Operations related to completion and intervention of subsea wells are extremely costly and the industry is searching for cost-efficient methods and technology to reduce these costs. This thesis will focus on control systems used during subsea completion and intervention operations. Where the industry standard has been to have an umbilical with service fluid all the way from the topside facilities to the subsea equipment, this thesis will investigate if a more active use of ROV technology can replace or simplify the conventional control system and make operations faster, safer and more cost-efficient. By placing the control system with supplementary control fluids inside an ROV skid (frame attached underneath the ROV), the control system can be implemented in existing ROV infrastructure. The system is called ROV-based Intervention and Completion Control System (RICCS). This thesis will consider traditional subsea intervention and completion equipment and operation procedures needed to perform such operations. Further, RICCS technology will be compared with the conventional technique. Involved equipment, operational procedures and relevant regulations will be analyzed to get an overview of which operations this control system can replace, future potential of this technology, which technical challenges that can be met to stretch the technology and which limitations the technology must relate to. The concept of the RICCS technology has from previous operations demonstrated a significant cost saving potential compared to deployment of conventional control systems. Further, this thesis has documented future benefits by utilizing this concept. With a conservative industry and imprecise regulations regarding this new technology, the RICCS technology has some challenges before the full potential can be exploited.
Master's thesis in Offshore technology *KAR*