Subsea services specialist 3D at Depth has completed a series of 31 metrologies for Subsea 7 at eight locations on Equinor’s Snorre field expansion in the North Sea.

Illustration (Courtesy of 3D at Depth)
Illustration (Courtesy of 3D at Depth)

UK-based engineering, construction and services company Subsea 7 contracted 3D at Depth’s U.K. office to conduct metrologies as part of the company’s installation campaigns for Pipeline Bundle systems.

Each location required metrology measurements for multiple parallel spools which would be installed as single cassettes between the Pipeline Bundles to wellheads and manifolds.

Using Subsea LiDAR technology, 3D at Depth exported every subsea 3D data set into standard formats for measurement, quality control, visualisation, and analysis.

Throughout the project, Subsea LiDAR scans were completed in 8-10 hours. In addition, multiple subsea LiDAR 3D point cloud data sets were combined with terrestrial LiDAR scans using a workflow developed by 3D at Depth to enable quality control.

Ian Ellis, operations and client lead Europe, Africa and the Middle East for 3D at Depth, said: “Our track record in the industry extends beyond the value of traditional metrology data collection survey programs. Subsea LiDAR’s capabilities are built around the quality and repeatability of the 3D data sets that the technology delivers on a consistent basis.

Our patented systems produce information that empowers installation engineers to have the confidence in the measurements, so they can challenge the boundaries of new installation designs to reduce risk and production downtime”.

The combination of terrestrial and subsea point cloud data allowed the team to derive inferred metrology results for the production manifold hubs which would be installed subsea during later campaigns.

3D at Depth’s Subsea LiDAR point clouds were then subsequently used during the spool design process and for cassette spool clash assessments, the company said. The client also received a high-quality digitisation of their subsea assets.

To remind, 3D at Depth launched its offshore geophysical survey services division in February 2021.

The new division will provide surveys to support both nearshore, inshore, and offshore deepwater development activities focused in the areas of offshore wind farms, pipeline routes, environmental site surveys, offshore hydrocarbon projects, and civil engineering surveys.

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