More than five weeks before disaster, the rig was hit by several sudden pulsations of gas called “kicks” and a pipe had become stuck in the well. The blowout preventer, designed to seal the well in an emergency, had been discovered to be leaking fluids at least three times.
Dealing with these problems required teamwork, a challenge to the throng of different companies with responsibilities on the rig. Of the 126 people present on the day of the explosion, only eight were employees of BP. The interests of the workers did not always align.
In testimony to government investigators, rig workers repeatedly described a “natural conflict” between BP, which can make more money by completing drilling jobs quickly, and Transocean, which receives a leasing fee from BP every day that it continues drilling.
Halliburton was also on hand to provide cementing services, while a subsidiary monitored various drilling fluids. A different company provided drilling fluid systems, another provided technicians to operate the remote-control vehicles that are they eyes of the rig crew deep underwater, and yet another provided the well casing.
Amid this tangle of overlapping authority and competing interests, no one was solely responsible for ensuring the rig’s safety, and communication was a constant challenge.
“I don’t have a feeling that there is somebody who has a handle on the coordination of all the activities on this vessel, going from routine to crisis,” Captain Nguyen said during one hearing. “BP is in charge of certain things, Transocean is in charge of certain things.”
Financial concerns added pressures on the rig.
BP had fallen behind schedule and over budget, paying roughly $500,000 a day to lease the rig from Transocean. The rig was 43 days late for starting a new drilling job for BP by the day of the explosion, a delay that had already cost the company more than $21 million.
With the clock ticking, bad decisions went unchecked, warning signs went unheeded and small lapses compounded.
In Gulf, It Was Unclear Who Was in Charge of Rig - NYTimes.com