Rigs and VesselsPetrobras extends charter agreement for first Tupi FPSOCidade de Angra dos Reis floater has been producing in Tupi since October 2010Cidade de Angra dos Reis FPSO operating in the Tupi pre-salt field offshore Brazil.Photo: GALP ENERGIAFabio PalmigianiSouth America CorrespondentRio de Janeiro