Caused of BP oil spill 2010

Updated at 5:19 p.m. ET

BP's internal report on the disaster "is some information that adds to our understanding but it is maybe not the be-all, end-all, " the U.S. point guy from the Gulf oil spill reaction stated Wednesday.

National Incident Commander admiral Thad Allen told reporters he could not discuss the report's timing, which arrived before national investigators have reviewed the failed blowout preventer. These devices, eliminated last week from the well, sometimes appears as a key bit of evidence to find down just what caused the catastrophe.

BP's interior report, introduced Wednesday early morning, stated "a sequence of failures" concerning "multiple companies and work groups" caused the Deepwater Horizon rig surge that killed 11 workers and led to the gulf oil spill.

In a 193-page report published on its web site, the power monster blamed the accident on "mechanical problems, real human judgments, engineering design, functional implementation and group interfaces." BP accepted some responsibility but blamed its partners, Halliburton and Transocean, for many mistakes leading up to the April 20 explosion.

"We have stated right from the start that surge on Deepwater Horizon had been a provided responsibility among numerous entities. This report makes that conclusion also clearer, providing a detailed evaluation associated with the realities and suggestions for improvement both for BP and various other parties involved, " BP's incoming leader Bob Dudley said in a press release. The report contains 25 recommendations for stopping a future tragedy.

Halliburton stated in a declaration that it omissions and inaccuracies in the report, the related Press reports. "technicians don't specify well design or make choices regarding screening processes as that obligation lies using well owner, " the statement said.

Transocean also criticized the report, calling it an attempt to hide the real cause of the explosion. The company, which owns the oil rig, blamed the disaster on what it described as "BP's fatally flawed well design, " the AP reports. "In both its design and construction, BP made a series of cost-saving decisions that increased risk, and in some cases severely, " Transocean said.

Lawmakers in addition took problem with BP's results. "This report is certainly not BP's mea culpa, " Rep. Edward J. Markey, D-Mass., informed the AP. "of one's own eight key conclusions, they only clearly simply take responsibility for half one. BP is thrilled to cut up blame, provided that they get the smallest piece."

Allen informed reporters Wednesday your process of forever plugging the fine could start Sept. 17-18 or 25-26, based on test outcomes.

The damaged blowout preventer that didn't end the oil from gushing grew up towards surface on Saturday. At the time of Tuesday mid-day, it hadn't reached a NASA facility in Louisiana in which detectives in the offing to investigate it, and so the conclusions were not element of BP's interior report. Oil have not flowed into the Gulf since July 15 whenever a temporary cap had been added to the busted well.

BP defended the busted well's design following its four-month examination, saying the accident included a well integrity failure, followed by a loss of hydrostatic control.

"on the basis of the report, it would appear unlikely the fine design contributed towards event, as research discovered that hydrocarbons flowed within the production casing through the base of well, " BP's departing leader Tony Hayward stated in a pr release.

• The concrete and shoe track barriers – plus in particular the cement slurry that was used – in the bottom regarding the Macondo well neglected to contain hydrocarbons in the reservoir, because they were designed to do, and permitted gas and fluids to move up the manufacturing casing;
• The outcome associated with unfavorable pressure test had been wrongly accepted by BP and Transocean, though really stability wasn't established;
• Over a 40-minute duration, the Transocean rig crew failed to recognize and act on influx of hydrocarbons in to the well through to the hydrocarbons were in riser and rapidly streaming into surface;
• Following the well-flow achieved the rig it was routed to a mud-gas separator, causing gasoline becoming vented on into rig rather than becoming redirected overboard;
• The circulation of fuel into the motor spaces through ventilation system produced a possible for ignition which the rig's fire and gas system couldn't avoid;
• Despite explosion and fire had disabled its crew-operated settings, the rig's blowout preventer from the seabed need to have activated immediately to secure the well. However it neglected to operate, most likely because critical elements weren't working.

The national government said it delivered a sixth bill, for $128.5 million, to BP also firms for expenses involving the spill. The very first five bills have now been paid-in full because of the energy monster, the us government stated. The spill has actually cost BP more or less $8 billion so far. The figure will not are the $20 billion sufferers' settlement investment that it agreed to create.