DATE OF DISASTER: APRIL 20, 2010
OIL PLATFORM: DEEPWATER HORIZON
COMPANIES INVOLVED:
- BRITISH PETROLEUM (Leased Deepwater Horizon)
- HALLIBURTON (Oil Services Contractor for Deepwater Horizon)
- TRANSOCEAN LTD. (Owns Deepwater Horizon)
After finding the documents the reveal BP’s short-cuts may have been the cause of the disaster in the Gulf, investigators continue to look into the events that led up to the explosion of the Deepwater Horizon.
Congressional investigators have identified several mistakes by BP in the weeks leading up to the disaster as it fell way behind on drilling the well.
BP started drilling in October, only to have the rig damaged by Hurricane Ida in early November. The company switched to a new rig, the Deepwater Horizon, and resumed drilling on Feb. 6. The rig was 43 days late for its next drilling location by the time it exploded April 20, costing BP at least $500,000 each day it was overdue, congressional documents show.
As BP found itself in a frantic race against time to get the job done, engineers took several time-saving measures, according to congressional investigators.
In the design of the well, the company apparently chose a riskier option among two possibilities to provide a barrier to the flow of gas in space surrounding steel tubes in the well, documents and internal e-mails show. The decision saved BP $7 million to $10 million; the original cost estimate for the well was about $96 million.
In an e-mail, BP engineer Brian Morel told a fellow employee that the company is likely to make last-minute changes in the well.
“We could be running it in 2-3 days, so need a relative quick response. Sorry for the late notice, this has been nightmare well which has everyone all over the place,” Morel wrote.
The e-mail chain culminated with the following message by another worker: “This has been a crazy well for sure.”
BP also apparently rejected advice of a subcontractor, Halliburton Inc., in preparing for a cementing job to close up the well. BP rejected Halliburton’s recommendation to use 21 “centralizers” to make sure the casing ran down the center of the well bore. Instead, BP used six centralizers.
In an e-mail on April 16, a BP official involved in the decision explained: “It will take 10 hours to install them. I do not like this.” Later that day, another official recognized the risks of proceeding with insufficient centralizers but commented: “Who cares, it’s done, end of story, will probably be fine.”
The lawmakers also said BP also decided against a nine- to 12-hour procedure known as a “cement bond log” that would have tested the integrity of the cement. A team from Schlumberger, an oil services firm, was on board the rig, but BP sent the team home on a regularly scheduled helicopter flight the morning of April 20.
Less than 12 hours later, the rig exploded.
BP also failed to fully circulate drilling mud, a 12-hour procedure that could have helped detect gas pockets that later shot up the well and exploded on the drilling rig.
Asked about the details disclosed from the investigation, BP spokesman Mark Proegler said the company’s main focus right now is on the response and stopping the flow of oil. “It would be inappropriate for us to comment while an investigation is ongoing,” Proegler told AP. BP executives including CEO Tony Hayward will be questioned by Congress on Thursday.
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Primary Sources:
http://www.marcoislandflorida.com/apps/pbcs.dll/article?AID=/20100614/GREEN/100614001/1075/Gulf-oil-spill-latest–BP-cut-corners–documents-reveal