U.S. Government, Transocean Bicker Over Custody of Oil Well Blowout Preventer 1.58K Jeff Neumann 09/16/10 11:17PM Filed to: evidence evidence oil spill Bp transocean deepwater horizon Lawsuits The blowout preventer that failed to prevent a blowout on the Deepwater Horizon oil rig is at a NASA facility being examined as evidence in the forthcoming Gulf oil spill trial. The rig's owner, Transocean wants to "examine" it first.