Carbon Capture Utilization and Storage (CCUS) facilities are crucial to mitigate the global emissions in the next years in industrial scale. In the first CCUS pilot projects, the CO2 injection wells were developed using traditional hydraulic systems, resulting in overly complex systems with considerable CAPEX and OPEX as well as environmental risks. Available all-electric subsea control systems, designed for the oil and gas industry, are not suitable for upscaling the CCUS due to much higher CAPEX investment.

During the development of a new series of all-electric Subsea Valve Actuators (OTC- 28828-MS (ORTH and HENDRIX 2018), OTC-31083-MS (ORTH, HENDRIX, et al. 2021), OTC-32129-MS (ORTH, PLACIDO NETTO and HENDRIX 2022) & OTC-32346-MS (ORTH, HENDRIX, et al. 2023)) using the hydrostatic drive principle, the actuation technology was optimized to handle high loads while minimizing the power consumption during operation. Without the need for electric energy storage, these actuators provide a highly responsive safety function with SIL 3 based on field-proven springs. With a standardized design integrating industrial and automotive components, a lean production system is applied to ensure high quality and efficiency. The new SVA R2 is qualified to operate quarter-turn valves up to 270 Nm with less than 48 W and to hold position with a stand-by power less than 15 W.

This drive technology is now used in the development of a new generation of Subsea Electric Actuators for larger rotative and linear valves, all using the low power demand. Simulations indicate that an entire subsea tree could be operated with less than 385 W without applying an expensive subsea battery.

One of the biggest challenges for newborn energy transition sectors, such as CCUS, is that the industry would like to take the advantages of all-electric subsea control systems, but the associated costs is forcing them to apply conventional offshore hydraulic systems with their associated complexity and low productivity.

This paper shows how such a lean electric actuation system could dramatically simplify the subsea control architecture, reducing so the costs of the overall electric infrastructure needed for a safe and efficient Carbon Storage Subsea.

Keywords:
brazil government, subsea system, offshore technology conference, united states government, valve, hendrix, lean electric actuation system, bosch rexroth ag, climate change, consumption
Subjects:
Offshore Facilities and Subsea Systems, Storage Reservoir Engineering, Environment, CO2 capture and sequestration, Climate change
Copyright 2023, Offshore Technology Conference DOI 10.4043/32679-MS
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