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Bluefield Geoservices Performs Deepest-ever Seabed CPT

Bluefield Geoservices (Bluefield), an international subsea geotechnical services provider, today released details of what the company believes to be the deepest-ever successful offshore Cone Penetration Test (CPT), carried out in ultra-deep-water depths of more than 4,000 meters in the Pacific Ocean. Bluefield operators successfully completed 23 seafloor CPTs to a push depth of 2 meters as part of an ongoing geotechnical site investigation campaign to assess the ocean floor conditions that characterize this vast abyssal plain.

Instrumental to this “industry first” was the deployment of Bluefield’s ROVcone, a proprietary CPT system that can be paired with any work class ROV, trenching machine, or similar subsea asset. The CPTs were carried out in conjunction with Bluefield’s BOXcone—a custom-built in situ testing tool designed to interface with a box core sample box—to enable the survey team to correlate the acquired seafloor data.

“This is an exciting milestone for the entire Bluefield team, both the skilled operators in the field and the subsea engineers that have worked so diligently in recent years to develop our exclusive toolkit of deep-sea geotechnologies, including the ROVcone CPT system,” said Bluefield Managing Director Jim Edmunds. “Most CPT systems, like the heavy duty 100 kN ROSON, are depth rated for 3,000 meters, so to see the ROVcone perform as designed at these unprecedented depths is hugely rewarding. And while we believe this to be the deepest offshore CPT on record, the ROVcone is in fact depth rated for operations to 6,000 meters below the surface, so the application of this equipment extends beyond these waters.”

Bluefield was founded in late 2018 by a team of offshore geotechnical experts seeking to disrupt the long-established order of subsea geotechnical services by fusing highly specialized geotechnical data collection services with the deployment of custom-engineered tooling. Since opening an office in Newport, Rhode Island in 2019, the firm has made a series of significant capital investments to ensure that the latest geotechnical solutions are available to the burgeoning US offshore wind industry and the broader offshore energy sector.

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