Undocumented changes to the Macondo well's blowout preventer created confusion and caused delays in the hours and days after the Apr. 20 blowout, Harry Thierens, BP's vice president for drilling and completions, said today in testimony before a joint investigation board of the US Coast Guard and Bureau of Ocean Energy Management

摘要

In a logbook entry from Apr. 25, Thierens wrote that Transocean officials showed "some confusion" about details regarding the control system on the BOP. The Houston hearings are the fourth in a series to look into the events leading up to the loss of the Deepwater Horizon and the deaths of 11 men