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been converted. In late 2022, Dutch-based Huisman an- consortium partners to ensure energy effciency and au- nounced the development of a harsh environment semi- tonomous operation offshore, as well as prepare the sys- submersible drilling rig design, which can be powered with tem for large-scale offshore commercial use. DNV helped onshore-produced hydroelectricity but also with foating TechnipFMC and the consortia develop the specifcation wind turbines. The rig includes a low drag electrifed ro- for the associated suite of digital twins according to their botic drilling system that offers consistent speed of opera- Recommended Practice DNV-RP-A204 (“Qualifcation tion, as well as a heave compensated drilling foor. The hy- and Assurance of a Digital Twin”). DNV collaborated to brid power system and energy storage systems could ensure defne the digital modules needed to be able to enable safe, that emissions are reduced by 30-40% per well1. unmanned, energy effcient and cost-effective remote op-
DNV also completed the concept verifcation review of eration of the system.
Odfjell Oceanwind’s WindGrid (WindGrid) system, a so- lution for providing an uninterrupted power supply from
Carbon capture and storage
Mobile Offshore Wind Units (MOWUs) to micro-grids.
Carbon capture and storage (CCS) is playing an in-
It combines energy storage, grid converters and foating creasingly important role in decarbonizing assets. DNV wind turbines in order to enable gas turbine generators to recently qualifed a modularized carbon capture facility for be shut down during peak wind power production.
offshore installations, developed by Aker Carbon Capture.
DNV’s review confrmed the technical feasibility of the The Just Catch Offshore technology is proven to capture
WindGrid system, and that expected reductions in CO2-
CO2 from fue gas stemming from turbines on foating emissions for North Sea applications are in the range of offshore installations, even in harsh weather conditions. 60-70%, compared to generation of electricity from con-
The modularized solution can ft into any type of applica- ventional gas turbines.
tion where gas turbines are present, bottom fxed as well
Elsewhere, there is advancement in the utilization of hy- as foating production facilities, such as foating produc- drogen for powering oil rigs. DNV was recently engaged tion, storage, and offoading (FPSO) and foating lique- by Ocyan as independent third party in the qualifcation fed natural gas (FLNG) vessels, power hubs, and offshore process of a system injecting hydrogen as an additive in power gas plants.
the internal combustion engines of drilling rigs, in order
The system is based on a modularized design with two to reduce diesel consumption and GHG emissions from standard units of 120 and 180 kTPA as building blocks. drilling. DNV’s technology qualifcation process will en-
The units are typically confgured and installed into one sure that the technology achieves the expected degree of module. However, by combining modules, the capacity maturity, following provisions in DNV-RP-A203 – which can be increased and adjusted in accordance with the spe- provides the industry with a systematic approach to tech- cifc requirements, providing signifcant fexibility towards nology qualifcation, ensuring that new technologies func- capture capacity and power demand. The qualifcation fol- tion reliably within specifed limits. lows concept studies with exploration, development and production, and FPSO operators in the oil and gas indus- try globally and the system will now support emission re-
Digitalization driving efficiencies
With a focus on decarbonizing offshore oil & gas plat- ductions across the sector.
forms, Technip FMC’s Deep Purple project aims to cre- ates a complete, sustainable subsea energy solution. The
Effective well management pilot includes an electrolyser, hydrogen storage, fuel cells,
While many decarbonization efforts focus on the rig it- and energy control system as well as the development self, there are substantial energy effciency benefts to be and testing of an advanced control and advisory system garnered within well operations. Oilfeld services business and a dynamic process simulator. The pilot will allow the Expro launched its iTONG™ System last year to address
Hydrogen renewable offshore energy production - hydrogen gas for clean electricity solar and wind turbine facility.
MARCH/APRIL 2023 OFFSHORE ENGINEER 55