Boskalis Offshore executed the dry transportation of the P-67 FPSO in 2018 from Qingdao China to Rio de Janeiro in Brazil. One of the main challenges for this project is the sheer size and weight of the P-67 FPSO. In order to transport the P-67 FPSO in a safe and controlled manner, new loading concepts and support structures have been developed. This paper addresses the challenges and lessons learned of the P67 FPSO transportation project. By means of several tangible examples and comparison with wet-tow the reader is explained how the dry-tow method benefits the transport of the P67 FPSO. The P67 FPSO is a critical asset for gas production, and as a result benefits deepwater FLNG in general. High level these benefits can be found in: Design optimizations - Stationary structures can be designed lighter and equipment can be optimized for local environment.Schedule optimizations - Dry transport increases schedule reliability and reduces time to market.Risk reduction - Reduced duration of exposure to risks at sea and specifically in critical areas.
Brazil began to explore its seas in the 60’s of the XX Century looking for petroleum. This journey began in the Northeast and the first oil field produced offshore was the Guaricema Field, in the State of Sergipe. During the 70’s, Petrobrás found oil in the Campos Basin, between the States of Espírito Santo and Rio de Janeiro, that became the most important oil province in Brazil until the discovery of the Pre-Salt province, in the Santos Basin. As these fields are producing for a long time, many of them are already completely depleted or their production is in way of to be not commercial anymore, and their facilities need to be decommissioned. This review of decommissioning practices of fixed offshore platforms carried out worldwide has focus on the removal of topside with special vessels designed for this purpose or with conventional methods (crane vessels + barge). It will show the benefits of using specialised heavy lift vessels to remove the topsides and move it to shore for dismantling / recycling / reuse / disposal. The cases for study were the successful decommissioning projects in the North Sea: Brent B/D, Valhall QP, Viking, Curlew, Eider A, Golden Eye and Leman, Iwaki-Oki, Halfweg Q1, Yme and Ninian North.
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