Measurement and Control

doi: 10.1177/002029400904200401pmid: N/A

Theobald, Mike

doi: 10.1177/002029400904200402pmid: N/A

Johannessen, Kjetil; Andreassen, Jon Steinar; Moe, Sigurd

doi: 10.1177/002029400904200403pmid: N/A

StatoilHydro, Weatherford, FMC Technologies and Nexans Norway are cooperating in a project called Integrated Fibre Optic Subsea System (IFOSS), where multiple aspects of utilizing optical fibre subsea for enhancing bandwidth and reach are addressed, when compared to conventional control systems. The project scope includes utilizing techniques and components from the telecom industry. A holistic approach is taken to include digital communication and transport of analogue signals from fibre based sensors.

Corneliussen, Sverre

doi: 10.1177/002029400904200404pmid: N/A

The Intelligent Well Interface Standard (IWIS) panel published Recommended Practice IWIS RP-AI in October 2007 after 10 years of work and meetings, and IWIS is now closed. This paper will address FMC experience of implementing IWIS in Subsea Control Systems. The practical use of the Recommended Practice, the specific requirements, the constraints and the gaps are illustrated with examples of actual system configurations and field experience. Subsea Instrument Interface Standardization (SIIS) activities have been running in parallel with IWIS and complementing IWIS. Some of the IWIS gaps will be closed as part of SIIS and are presented with description of proposed recommendations. Practical use of SIIS and current gaps are illustrated with examples of actual system configurations and field experience. Subsea Fiber Optical Monitoring (SEAFOM) is also running in parallel with SIIS and FMC has actively participated in IWIS, SIIS and SEAFOM since the beginning. Some of the benefits of participation together with some lessons learned are presented.

Deans, Gregor

doi: 10.1177/002029400904200405pmid: N/A

Subsea systems designed for continuous operation on the seabed are required to demonstrate very high reliability and it is not uncommon to encounter requirements that state a 10 year Mean Time Between Failure (MTBF) and 20 year design life.While the environment on the seabed is in general quite benign and predictable, the importance of system availability to maintain production and the duration over which reliability needs to be demonstrated becomes a critical issue.This short paper briefly outlines the process, results and lessons learned from over four years of qualification testing, reliability analysis and extended life testing as part of the development of an advanced subsea surveillance system to ensure a final commercial product which shall maintain a high availability through-out its operational lifetime.