Autonomous Subsea Power Richard Knox, EC-OG info@ec-og.com +44 (0) 1224 933301
Challenge • Providing power and communicating with remote well locations • Substantially reduce cost of providing subsea power Average Well Tieback Distance Source: Infield Systems
Remove the Umbilical Decommissioning Late Life Production SPH Xmas Tree SCM Direct Actuator Override Sensor Direct Pressure Cap Remote Monitoring
Subsea Well Power & Communications Brown Field System Hardwire Satellite Wireless comms medium Buoy Existing Surface Comms Host Facility + Ocean Surface Acoustic Modem Acoustic Tree SCM Modem Umbilical SPH Wellhead Seabed Hydraulic Chemicals Export Pipeline
Subsea Well Monitor Surface HMI Hardwire Wireless comms medium Trans / Ocean Surface Receive Trans / Receive Acoustic Tree Modem SPH Wellhead Seabed
Subsea Power Hub (SPH) Ocean Current Energy Converter • Predictable Energy Source • Energy Storage • Compact Energy Conversion
Subsea Power Hub (SPH) • Maximum energy extraction from SPH footprint • Energy Storage • Installation by entry level CSV • Low cut-in speed • Overtrawlable • Intelligent energy management system (IEMS) • Built-in redundancy
Energy Storage Continuous Power for SCM Continuous Power for SCM Continuous Power for SCM Ni-MH Li-ion Lead Acid 8 Tonne 0.1 Tonne + regeneration 24 Tonne 300 kWh 300 kWh Bad Memory Effect Gas Produced Self Discharge Containment Issues 2006 2016 Pre-2000
Energy Storage Continuous Power for SCM Continuous Power for SCM Continuous Power for SCM Ni-MH Li-ion Lead Acid 8 Tonne 0.1 Tonne + regeneration 24 Tonne 300 kWh 300 kWh 3000 kWh Bad Memory Effect Gas Produced Self Discharge Containment Issues 2006 2016 Pre-2000
Summary of Benefits • Enables alternative to an electrical umbilical • Reduced delivery and installation time • Installation by minimum capability vessel • Energy recovery from the environment • Reduced decommissioning cost
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