Rigs and VesselsUS driller nabs $195 million extension with high dayrate for rig in Gulf of MexicoTransocean secures lucrative extension for Deepwater Asgard in US GulfTransocean chief executive Jeremy Thigpen at ONS 2016 in Stavanger.Photo: KAIA MEANSRobert StewartNorth America Energy CorrespondentBaton Rouge