InterMoor do Brasil Aids OSX-1 FPSO Decommissioning

InterMoor do Brasil, an Acteon company, has completed its involvement in the decommissioning operations of the OSX-1 floating production storage and offloading (FPSO) unit.

InterMoor do Brasil was responsible for the disconnection of the submerged turret production system (STP) to allow the vessel to navigate to its final destination.

The company provided engineering services, including operation procedures and dynamic analysis for overboarding and installation of the cone seal plug on the FPSO moonpool, STP-buoy disconnection procedure, FPSO station keeping and heading control, and vessel inspection.

Intermoor also provided survey services, operation risk management, equipment management and offshore personnel.

Cleiver Moulin, managing director, InterMoor do Brasil, said, “It is remarkable that these complex operations were completed using only a conventional anchor handling tug supply vessel (AHTS) and tug supports, without any ROV intervention, or offshore installation crane. Our engineering and survey teams carried out specific dynamic analysis in order to guarantee a successful cone seal plug deployment and connection to the FPSO moonpool. They also carefully involved all parties in a hazard identification and risk assessment meeting to ensure full safety during the operation, and mobilized a fully redundant survey system onboard the FPSO. In the end, the operation was completed without incidents or accident. I am very proud of all involved in this successful operation.”

The OSX-1 was the first FPSO to be decommissioned in Brazil waters, the company noted. The operation took place in a water depth of 127 meters (417 ft) at Tubarão Azul field.

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