Rigs_and_VesselsSete Brasil salvage plan faces new hitchPetrobras, Sete Brasil and Magni Partners forced to delay closure of agreement over unfinished rigsIn the spotlight: the semi-submersible rig Urca seen at dockside in Keppel Offshore & Marine's BrasFels shipyard in BrazilPhoto: KEPPEL OFFSHORE & MARINEGareth ChetwyndLisbon