Nothing wrong with the parts human error involved..The rig was not in full production....someone clamped the drill rod and then failed to release clamp and moved the drill and a connecter damaged the seals uncontrolable presure after the seal is gone...They had issue with this pocket of oil and gas before and had to cap a well...Company was drilling at 1 million a day cost to BP and were pressured into getting the job done. Estimate for the well drilling was 21 days had gone 6 weeks...money gets in the way again..