 In 2015, Petrobras alleged bribery in the negotiations of rig contracts signed by Sevan Drilling, a subsidiary of Seadrill, in 2005-2008.In November 2009, Seadrill's West Atlas jackup rig, which was located on Montara field, about 690 kilometers offshore of Darwin, Australia, caught fire after the field had been leaking oil for ten weeks.The rig was operated by the Thai firm PTTEP.