Application: Down Well Data Interrogation
Vehicle: C-Worker 6
Payload: Acoustic Modem
Summary: Integrated with an acoustic modem payload, the C-Worker 6 was used for 4 days of station keeping and extracting data from subsea wellheads in the East Irish Sea.
Benefit: Saved the cost of using a traditional ship.
This operation for Metrol used the C-Worker 6 to gather wireless downhole data from two gas wells located in the East Irish Sea.
Surface and sub surface acoustic modem kits were provided by Metrol and sent to ASV in Portchester for fitting to an existing Metrol payload frame.
Following the payload integration, communication tests were run from the vehicle to the Metrol Data Centre in Aberdeen. Pre-deployment sea trials then took place to replicate the mission and continue the communications via Iridium satellite.
The ASV operations team organised the transportation of the C-Worker 6 from ASV’s Portchester base to Fleetwood.
Once launched, the C-Worker 6 transited alongside the support vessel to the operational zone.
C-Worker 6 operated in the gas field for a 4 day period gathering data and transmitting it back to the Metrol Data Centre in Aberdeen.
Throughout the operation the C-Worker 6 followed a mission plan set up and executed through the ASView™ control system.
ASV operations personnel maintained watch over the C-Worker 6 throughout the mission.
C-Worker 6 successfully held station and extracted data from wireless units on the subsea wellheads via the integrated acoustic modem payload.
Encountering rough conditions of up to sea state 4, C-Worker 6 proved its capabilities which have the potential to replace a large ship on station. This ability presents opportunities to not only significantly reduce the cost of operations at sea, but also increases the available time to harvest data from subsea devices in a cost effective manner.
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