As many readers mentioned in the comments leading up to BP’s hairline thin victory over Bank of America in this year’s Worst Company in America tournament, the oil company wasn’t the only one involved in the disaster on the Deepwater Horizon oil rig. Now, a year on from that horrible incident, BP has filed suits against Halliburton, Transocean and Cameron International.

BP’s suit against Transocean accuses the owner of the doomed rig, of negligence because every safety and oil-control measure failed. You might remember that Transocean recently issued an apology after it declared 2010 its “best year” in safety.

Cameron International made the infamous blowout preventer on the rig. BP’s suit claims that the device’s faulty design caused it to fail when the rig collapsed, allowing millions of barrels of oil to be released into the Gulf of Mexico.

And finally, there is another Worst Company champ, Halliburton, whose cement work on the rig is the subject of BP’s lawsuit. The oil company alleges fraud and concealment of material facts regarding the strength of its “cement slurry.”

BP lashes out at its partners with billions in legal claims for massive Gulf of Mexico oil disaster

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