Transocean...owner of the rig that exploded before the worst offshore oil spill in U.S. history in 2010, sought to force a BP...manager to explain what occurred at the well prior to the blowout. Transocean asked the U.S. District Court in New Orleans to compel Donald Vidrine to testify. He was BP’s well site leader on the Deepwater Horizon rig when the Macondo well in the Gulf of Mexico exploded. Vidrine has cited medical-related problems for refusing to testify, in person or in writing, Transocean’s lawyers said in a court filing...Vidrine “is a key source of information regarding critical events and operations that occurred immediately prior to the blowout,” Transocean said. “Mr. Vidrine’s medical issues do not provide a legal basis for his refusal to testify.”