Louisiana five years after BP oil spill: 'It's not going back to normal no time soon'. Read more. Reuse this content. Environment Climate crisis Wildlife Energy Pollution. It suggests that "improved engineering rigour, cement testing and communication of risk" by Halliburton could have identified those flaws. But the report also says the Houston-based BP staff at the site could have raised awareness of the problems.
A "negative-pressure test" was carried out to check the mechanical barriers. The report says that Transocean rig crew and BP leaders on the site "reached the incorrect view" that the test had been a success and the well was secure. The report says that the Transocean rig crew and a team described as "mudloggers" working for Halliburton Sperry Sun may have been distracted by what are described as "end-of-well activities" and, as a result, important monitoring was not carried out for more than seven hours.
The crew "underbalanced" the well by pouring seawater into it rather than heavy-drilling mud. This allowed gases through the blowout preventer. For an estimated 40 minutes, the influx of gases into the well was apparently not spotted. By this time "hydrocarbons were rapidly flowing to the surface" and, according to witnesses, mud flowed uncontrolled on to the rig platform.
The BP report says that if the blowout preventer had been closed and sealed around the drill pipe before that point, gases probably would not have entered the pipe known as the riser. BP urged Barbier to use an estimate of 2. Both sides agreed that , barrels, or 34m gallons m liters , of oil escaped the well but were captured before it could pollute the Gulf. This article is more than 7 years old. Reuse this content.
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