BP used cheaper casing on oil well to save money, Congress papers show
In the days before the blast, the oil giant selected a casing that provided only a single layer of protection to prevent gas from leaking into the well, according the details obtained by The New York Times from a Congressional investigator.
Workers on the rig and from BP have said that gas bubbled into the well and was a key factor in causing the April 20 blowout, which killed 11 people.
read more thanks to times online.