SAN FRANCISCO (MarketWatch) -- Finger-pointing was the order of the day among contractors named in the BP PLC report released Wednesday, as both Halliburton Co. and Transocean Inc. lashed back at their partner over the report on the Deepwater Horizon rig that failed, killing 11 workers and spewing millions of gallons of oil into the Gulf of Mexico.

Transocean RIG, -4.26% and Halliburton HAL, -0.16% both issued statements countering BP's BP, -1.18% (BP) claims in the 193-page report. BP's findings spread much of the blame to its partners on the Macondo oil well that blew on April 20 and wasn't brought under control until three months later.

"This is a self-serving report that attempts to conceal the critical factor that set the stage for the Macondo incident: BP's fatally flawed well design," Transocean said Wednesday morning.

Halliburton followed up with its own statement as well, declaring that the BP report contained "a number of substantial omission and inaccuracies."

"Halliburton remains confident that all the work it performed with respect to the Macondo well was completed in accordance with BP's specifications for its well-construction plan and instructions, and that it is fully indemnified under its contract for any of the allegations contained in the report," the company said.

BP's report pointed to eight key events that led to the blowout on April 20, relating mostly to the failure of the cement seal intended to keep the rogue well under control -- a job that was undertaken by Halliburton, as well as the operation of the rig, which was Transocean's bailiwick.

BP pointed out its own culpability by failing to scrutinize a pressure test on the rig, but it also implicated Transocean in that matter.

"The Transocean rig crew and BP well-site leaders reached the incorrect view that the test was successful and that well integrity had been established," the BP report said.

The report also notes that making this incorrect assumption resulted in BP's failure to properly balance the drilling mud with seawater in sealing the well, allowing oil and gas to seep up through the riser pipe.

Offering a more detailed analysis in its response, Transocean said: "In both its design and construction, BP made a series of cost-saving decisions that increased risk -- in some cases, severely."

“ 'BP blaming others for the Gulf oil disaster is like Bernie Madoff blaming his accountant.' ” — Robert Gordon, attorney

Transocean blamed BP for its failure to have the proper number of barriers to gas flow, and also for its failure to test the integrity of the cement seal that would have kept oil and gas in the undersea reservoir several miles below the surface of Gulf waters.

The blowback to BP wasn't limited to just its partners, though. Several other entities joined in to respond to the report, including Democratic Rep. Edward Markey of Massachusetts, chairman of the House Energy and Environment Subcommittee.

Markey said the company's own internal investigation into the spill won't be the last.

"This report is not BP's mea culpa. Of their own eight key findings, they only explicitly take responsibility for half of one. BP is happy to slice up blame, as long as they get the smallest piece," he said in a statement.

The legislator went on to say: "BP is right that there was no one event that caused the disaster, and that blame can be shared among many parties. From the assurances given by the oil industry that this type of accident wouldn't happen and could be contained if it did, to the overly cozy relationships established between the oil industry and regulators, the series of events leading to this spill stretches back decades and the blame spans across the entire oil industry."

Asked for comment, White House spokesman Robert Gibbs said only that the government would continue to investigate the matter.

But even those directly impacted by the spill jumped into the fray. Attorney Robert Gordon, who represents a number of fishermen, hotels and restaurants impacted by the blowout, said: "BP blaming others for the Gulf oil disaster is like Bernie Madoff blaming his accountant."