The BP Deepwater Horizon oil rig before the blowout and explosion on 20 April 2010. via baynews9.com

By Jef Feeley and Laurel Brubaker Calkins
25 February 2012 BP Plc (BP) officials overseeing the Macondo well that spewed millions of gallons of oil into the Gulf of Mexico ignored questions about whether safety tests done hours before a fatal blast on the drilling rig were flawed, lawyers for Transocean Ltd. (RIG) said in a court filing. Donald Vidrine, the senior BP manager on the Deepwater Horizon rig on April 20, 2010, talked with an engineer about unsatisfactory well tests less than an hour before an explosion killed 11 workers on the rig and sent oil pouring into the waters off Louisiana, Transocean’s attorneys said in a filing tied to a trial set for tomorrow with billions of dollars at stake. Transocean owned the rig and was drilling in a well owned by BP and other partners. While Mark Hafle, a Houston-based BP drilling engineer, warned Vidrine in a phone call that stability tests on the well might be flawed, “neither man stopped work” at the facility, Transocean officials said in the Feb. 24 filing. The BP officials allowed crews to continue displacing drilling fluid in the well with seawater, company lawyers said in the filing. Once the fluid was removed, the lighter seawater couldn’t stop natural gas from leaking into the well, leading to the explosion, the filing said. The filing came three days before BP, Transocean, the U.S. government and plaintiffs suing over the oil spill are scheduled to begin a trial in New Orleans to apportion blame for the disaster and determine exposure to punitive damages. U.S. District Judge Carl Barbier, who will hear the case without a jury, is to rule whether BP should get help from the other firms involved in paying the $26 billion in costs associated with the disaster and its resulting offshore spill, the largest in U.S. history. […] Vidrine has refused to testify about his actions on the rig, citing medical-related problems. His lawyer, Robert N. Habans Jr., didn’t immediately return phone and e-mail messages yesterday seeking comment on the filing. […] Transocean officials have urged Barbier to force Vidrine to testify, calling him in court filings a “key source of information regarding critical events and operations that occurred immediately prior to the blowout.” Barbier ruled this month that Vidrine must be examined by an independent doctor to determine whether he should be required to give a deposition in the case. […] “The fact that BP’s on-shore drilling engineer and well site leader disregarded then negative pressure test results is critical to establishing that key BP personnel failed to stop work despite having knowledge of the unsatisfactory test results,” Transocean’s lawyers said in the filing. […]

BP Ignored Well Test Warning, Transocean Says on Eve of Trial