DNV has introduced a unique technology at OTC 2000 for scanning of various offshore structures. Without any production shutdown or need for pre-cleaning, FPSO hulls and steel structures, such as risers or platforms, can be assessed with continuous mapping. Steel thickness measurements are carried out in a fast, simple, cost-effective and accurate way.
This is a resonance thickness measurement technique where the measuring equipment is mounted on Remote Operated Vehicle (ROV) and sends signals through steel structures. By measuring the resonance, the thickness of the steel is calculated on-line with a high rate of accuracy. Measurement is made in real time, and the results can be directly loaded into a programme for analysing the current structural strength.
This new technology is a result of a six-year R&D program, founded and specified by DNV and carried out in collaboration with Kongsberg Defence & Aerospace. The lightweight, portable tools – including Resonance Thickness Measurements Probe, Offshore Crawler Remote Operated Vehicle and Wide-Band Acoustic Positioning – were presented at the OTC conference and exhibition in Houston. Oceaneering International is contracted for development and operating of the ROV.
More information: Eva Halvorsen