Robertson Geo has been supplying equipment and services to the OWF market since 2008, most notably the PS Logger® probe, which has established itself as an essential part of OWF site geotechnical investigation. From 2008 to the present-day Robertson Geo Services (RGS) have undertaken 60 OWF projects across 51 wind farms globally. In addition, RGS has provided rental systems for OWF, with on-site training, and equipment and technologies purchased from Robertson Geo have seen action on many global OWFs.
Wireline logging provides unique high quality in-situ data which is used in the complex design process required for OWF turbine installations. The PS Logger® is used to determine P and S wave velocities which feed into stiffness calculations for these designs. This data is complementary to that from CPT and SCPT by providing data in harder formations where CPT methods cannot penetrate. With its integral source and consistent energy delivery the PS Logger® can collect data from any depth required for geotechnical investigation.
As wind farms have, by necessity, moved ever further from shore, so the geotechnical investigation methods have had to evolve to meet these challenges. This has seen moves away from jack-up platforms, still used for near shore investigation, to complex heave compensated drill ships with dynamic positioning. The wireline method has similarly evolved to work efficiently on these complex vessels with the advantage of being able to deploy a range of probes from the same surface set-up in a single borehole.
As clients demand ever more and better cost-effective data to streamline their design processes, the wireline method and specifically the PS Logger® will continue to evolve to meet these requirements… Click for more
