• 2016 August 8 12:53

    ISDS first for DNV GL classed Ocean Greatwhite - world’s largest semi-submersible

    DNV GL has welcomed the world’s largest semi-submersible drilling rig into class recently. Ocean Greatwhite is 123 metres long and 78 metres wide and was delivered at Hyundai Heavy Industries in Ulsan, South Korea. Owned by the Houston-based drilling contractor Diamond Offshore, the rig will be chartered to oil major BP and will operate in the Great Australian Bight.

    The rig is to be a new design MOSS CS60E high specification state-of- the art semi-submersible drilling unit suitable for operations in harsh environments, which is the first MOSS CS60E and the largest rig in the world.

    “The Ocean GreatWhite is a unique rig purposely built for drilling in harsh environments,” said Karl Sellers, SVP Technical Services at Diamond Offshore. “HHI and DNV GL were integral in helping us get this rig to market as we prepare for the drilling project in Australia with BP.”

    “We have a strong relationship with both DNV GL and Diamond Offshore – and it is thanks to this good cooperation that the project went so well. We are proud to deliver the first drilling ship of this size and look forward to many more projects on this scale,” Youngseuk Han, Senior Executive Vice President at HHI said. “We will keep moving the boundaries of technology by completing following large-scale and innovative projects.”

    “Ocean Greatwhite is capable of operating in depths of up to 3000 metres and can drill down to a depth of 10,670 metres. It represents the state of the art in the semi-submersible sector and we are very pleased to have been asked to contribute our expertise to this project,” says Paal Johansen, Vice President and Regional Director, Americas at DNV GL.

    Ocean Greatwhite is also the first new-build rig to receive the DNV GL Integrated Software Dependent Systems (ISDS) notation. ISDS are systems whose performance is dependent on the overall behaviour of their integrated software components. DNV GL’s ISDS standard helps owners and operators minimise software integration errors and delays in projects involving complex integrated systems.

    The certification ensures that software and integration issues are identified and resolved early on during the project design stages. It also represents a new approach to verification, as it emphasises a review of the working methods and processes that lead to the delivery the systems, rather than simply focusing on the final review of documents and installations to ensure they meet product requirements.
    Industry data suggests that high specification mobile offshore drilling units may experience 30 per cent down-time during their first years of operations, which makes a systematic framework for ensuring that ISDS achieve the required reliability, availability, maintainability and safety essential. “We expect that the operational performance of Ocean Greatwhite will demonstrate how the ISDS notation can contribute to increasing the reliability of the complex systems onboard,” adds Paal Johansen. DNV GL’s ISDS teams in Korea, Norway, and the USA all contributed to the project. DNV GL also provided advisory services to HHI on the integration of the various systems throughout the newbuilding process.

    About DNV GL
    Driven by its purpose of safeguarding life, property and the environment, DNV GL enables organizations to advance the safety and sustainability of their business. Operating in more than 100 countries, the company’s 15,000 professionals are dedicated to helping their customers in the maritime, oil & gas, energy and other industries to make the world safer, smarter and greener.

    About Hyundai Heavy Industries
    Hyundai Heavy Industries (HHI) is the world’s biggest shipbuilder and a leading offshore facilities manufacturer that operates seven business divisions and 25 overseas incorporated firms and 16 overseas subsidiaries around the world. HHI has delivered more than 2,000 quality ships and more than 170 offshore projects including over 100 EPIC projects in turn-key basis. Moving forward, HHI will continue to strengthen its global standing as the world’s leading heavy industries company by providing total solutions for its valued clients across a diverse selection of industries.

    About Diamond Offshore
    Diamond Offshore is a leader in offshore drilling, providing contract drilling services to the energy industry around the globe with a total fleet of 30 offshore drilling rigs, including one under construction. Diamond Offshore's fleet consists of 21 semisubmersibles, of which one harsh environment semi is under construction, four dynamically positioned drillships, and five jack-ups.


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