Transocean Ltd. (RIG) said Wednesday that BP PLC's (BP, BP.LN) internal investigation of the Deepwater Horizon incident is a "self-serving report" that attempts to conceal the role BP's decisions played in the event.
Transocean Ltd. (RIG) said Wednesday that BP PLC's (BP, BP.LN) internal investigation of the Deepwater Horizon incident is a "self-serving report" that attempts to conceal the role BP's decisions played in the event. 

In a report released Wednesday morning, BP said many actions by numerous companies, including contractors Transocean and Halliburton Co. (HAL), led to the blast on April 20 that killed 11 and unleashed the worst offshore oil spill in history. BP pointed to maintenance problems in the Deepwater Horizon rig, which was owned by Transocean, and errors in the cementing job performed by Halliburton.

In an e-mailed statement, a Transocean spokesman said that BP made a "series of cost-saving decisions that increased risk -- in some cases, severely." They included using a well design that reduced the number of barriers to gas flow, as well as not testing the integrity of the cement enough and not following some of Halliburton's recommendations on the cementing.

Those decisions were "made exclusively by BP," the statement said.

In its report, BP said that it is unlikely that well design elements led to the blowout.

Transocean said its investigation of the incident is "ongoing, and will be concluded when all the evidence is in, including the critical information the company has requested of BP but has yet to receive."

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