Video: Safety Capability of an All-Electric Production System
- Carsten Mahler (OneSubsea, a Schlumberger company) | Markus Glaser (Aalen University) | Simon Schoch (Aalen University) | Stefan Marx (SubCtech GmbH) | Stefan Schluenss (SubCtech GmbH) | Tobias Winter (Aalen University) | Julian Popp (Aalen University) | Sebastian Imle (Wittenstein Motion Control)
- Document ID
- Offshore Technology Conference
- Publication Date
- Document Type
- 2019. Copyright is retained by the author. This presentation is distributed by OTC with the permission of the author. Contact the author for permission to use material from this video.
- 6.3 Safety
- Controls, Electric actuation, Functional Safety, All-Electric, Subsea Production
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- 2 since 2007
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The all-electric control system, as proposed with this paper, provides improved HSE, reduced costs, and increases safety and reliability compared to an electrohydraulic system. This paper describes the approach for the development of a novel all-electric safety actuation system. Key to this concept is the centralized battery, which is utilized to provide the system with the required amount of energy during valve actuation for normal operation and in case of a power cut or communication loss. Since instantaneous power for valve operation is supplied by the battery, continuous power demand remains at a similar level for current electrohydraulic solutions.
This paper includes a detailed analysis to evaluate the safety and reliability capability of the proposed all-electric system. It also covers root causes for failure modes and suitable mitigations to prevent occurrence or for failure impact reduction. Further objective is the analysis of common cause failures, which are critical for safety function execution. The paper is a result of the work of a joint industry project.