Mammoet was selected by PTSC Mechanical & Construction Company to complete a four-phase project for the Sao Vang and Dai Nguyet (SVDN) gas and condensate development project, located approximately 300km south-east of Ho Chi Minh City, offshore Vietnam. Mammoet’s contribution to the development project included load out of the Sao Vang jacket, flare tip installation, installation of the living quarters module and topsides integration with a deck support frame.
The project’s first phase involved load-out of the jacket. Extensive engineering preparations were needed, considering the vast weight of this infrastructure; weighing in at 12,733t. Due to its large dimensions - 131m x 81.7m x 56m - Mammoet utilized a strand jack load-out system to provide a feasible and cost-effective solution.
The jacket was built with a launch truss on skid beams, with breakout jacks used to initiate movement the jacket from its assembly position before strand jacks and winches began the main pulling operation. The barge was equipped with external high-capacity submersible ballast pumps, which were synchronized with the barge’s internal pumping system. The internal ballast system was then used for de-ballasting with Mammoet monitoring and controlling ballasting from the barge bridge.
