ExclusiveSubsea7 sees off rival Saipem to secure $750 million-plus Petrobras dealContract will serve a major Petrobras project in the Santos basin pre-salt provinceSubsea7 chairman Kristian Siem (left) and BW Offshore chairman Andreas Sohmen-PaoPhoto: NTB/SCANPIXFabio PalmigianiAmanda BattersbyRio de Janeiro/Singapore