Modus Performs Decommissioning Survey with Hybrid AUV

17 September 2019

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Subsea specialist Modus Ltd, has recently completed a high-speed decommissioning survey in the North Sea for Rever Offshore using one of its Hybrid Autonomous Underwater Vehicles (HAUV).

The objective of the survey was to locate any items of debris that remained at the sites after the decommissioning of Fairfield assets in the Northern North Sea, including work performed within the 500m zone, and the scope further included survey of pipeline routes between additional platforms.

The surveys were successfully performed at speeds of up to 4.6km/hr in water depths of approximately 150m. For this scope, the flexible HAUV was equipped with dual head multi beam sonars and high-resolution Side Scan Sonar. Utilisation of the HAUV spread increased operational efficiency in relation to the speed of data acquisition and improved data quality.

Philip Strettle-Brown, Survey Manager at Rever Offshore commented "The use of the HAUV allowed us to significantly reduce the timescales of obtaining the required survey data and improve the overall efficiency of the produced surveys. By implementing new technology, the data obtained was of significantly higher quality and resolution when compared to alternative methods".

Nigel Ward, Chief Commercial Officer at Modus Seabed Intervention, said "We are very pleased with the positive impact and clear benefits that the Modus HAUV has had on this decommissioning project. Modus have been able to significantly reduce the survey time infield while delivering class leading data quality in combination with Rever Offshore's processing expertise. We feel that this methodology has created a new efficiency benchmark for future decommissioning surveys in the North Sea."    

Modus Seabed Intervention Limited
Beaumont House
Beaumont Street
Darlington
County Durham DL1 5RW
UK
T: +44 (0)1325 387480
F: +44 (0)1325 387481

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