Swire Seabed completes unmanned subsea pipeline inspection for Equinor in the North Sea

19 Aug 2019

Singapore, 19 August 2019 – Swire Seabed has successfully completed a second offshore pipeline campaign for Equinor in the North Sea. The campaign, undertaken in July 2019, is the first fully unmanned offshore pipeline inspection ‘over the horizon’ ever completed, surveying up to 100 km from the shore.

The recent inspections by Swire Seabed were completed using Kongsberg Maritime’s Hugin AUV (Autonomous Underwater Vehicle) with the SeaKit Maxlimer Unmanned Surface Vessel (USV) acting as the host vessel for surface positioning and communications to shore. The complete operation was controlled from an onshore control centre, including launch and recovery of the AUV, command and control of the USV/AUV and monitoring of the acquisition of pipeline inspection data.

The inspections were performed on four pipelines, a distance of 175 km surveyed over two AUV dives. The AUV, operated by Swire Seabed, acquired Bathymetric, Synthetic Aperture Sonar and HD Image data in order to verify the continued integrity of the subsea pipelines. The acceptance criteria for data (quality, coverage, density etc.) were identical to the criteria used for traditional tethered inspection methods.

Acquiring pipeline inspection data from an AUV offers unrivalled data quality and consistency from a fast, stable platform, and combined with the unmanned methodology, it represents a paradigm shift in offshore geophysical survey and pipeline inspection. By utilising a small unmanned craft hosting the AUV, the carbon footprint per inspection line kilometre is reduced dramatically. A traditional host vessel may use 10 - 15m3 (10,000 - 15,000 litres) of fuel per day of operations, whereas a small unmanned craft uses up to 95% less fuel.

In addition to the carbon-efficient nature of the operation, performing a pipeline inspection with unmanned systems eliminates the risk to personnel who would otherwise be exposed to offshore operations. The entire dual USV/AUV operation was executed by a small team of personnel working in a control centre in Swire Seabed’s HQ in Bergen.

“The completion of this project demonstrates Swire Seabed’s ability to deliver ‘firsts’ for the industry. This application of technology represents a step-change in the levels of safety, sustainability and low cost that can be achieved in subsea pipeline inspection and seabed mapping. We look forward to further developing and expanding the service in the coming years,” says Swire Seabed’s Chief Technology Officer, Arvid Pettersen.

This inspection campaign is part of Swire Seabed’s ongoing expansion of its provision of remotely controlled and unmanned subsea survey and inspection systems, covering landfall to offshore, large area mapping to small high-resolution inspection. The campaign is yet another technological breakthrough, giving our clients access to safer, more sustainable and more cost-effective subsea solutions.

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For media queries, please contact:
Dorothy Ng
Corporate Communications Manager
Swire Pacific Offshore Operations (Pte) Ltd
DID: (+65) 6505 3228
Mobile: (+65) 9631 5500
Email: dorothy.ng@swirespo.com
 
Arvid Pettersen
Chief Technology Officer
Swire Seabed AS
DID: (+47) 5518 1830
Mobile: (+47) 9079 3494
Email: post@swireseabed.com

About Swire Seabed AS (Swire Seabed)
Swire Seabed has a dependable track record for undertaking a wide range of subsea projects for the international Oil & Gas industry, as well as a range of challenging recovery and incident response operations through our team of highly experienced personnel both onshore and offshore. Operations are managed from Swire Seabed’s head office in Bergen, Norway with operations in Asia Pacific supported by our office in Singapore. Swire Seabed is a fully-owned subsidiary of Swire Pacific Offshore (SPO). The integration of Swire Seabed’s cutting-edge practical expertise into SPO’s robust global conglomerate ensures that Swire Seabed can deliver reliable offshore construction support, ROV and survey services to the Oil & Gas and renewables sectors worldwide. For details on Swire Seabed, please visit www.swireseabed.com.