Reduce Jacking Failures

Jacking gears are, by definition, the most characteristic systems of self-­elevating units and jackup platforms. How­ever, this gear often remains neglected onboard, with a high potential for dire consequences. To achieve higher availability, reduce the risk of gear failure (Fig. 4), and lower the life-cycle cost, Det Norske Veritas (DNV) is inviting the industry to participate in a joint-industry project (JIP). The project’s main focus will be on defining best practices in the maintenance and inspection of jacking gears. The consequences of jacking-gear failure range from the operator being unable to reposition the platform to logistical challenges in correcting the failure. The worst-case scenario is if the failure occurs in the middle of a jacking operation, as this may lead to an unstable platform that is vulnerable to wave impacts. On the basis of their respective backgrounds as a classification society and a service supplier, DNV and WillTeco have initiated a project to improve the inspection and maintenance of jacking gears. To carry out the initiative, all the players in the self-­elevating segment are invited to participate. The JIP’s goal is to develop a ­recommended-practice document that describes the solution to achieve higher availability and reduce the risk of jacking-gear failure. The JIP plans to collect and analyze experienced (near) incidents, mutually review current inspection and maintenance work supported by risk-based modeling, and select and define best practices.

Fig. 4: Damaged jacking gear.
(Photo courtesy of WillTeco.)



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