BP Finishes Pumping Cement As It Tries To Seal Well – video 0:42

BP finishes pumping cement in final stage of 'static kill'

BP has finished pumping cement into the blown-out Macondo well in the Gulf of Mexico as part of its efforts to permanently plug the source of the nation's worst oil spill, the company said Thursday.

Engineers started the cementing operation at 10:15 a.m. EDT and completed it at 3:15 EDT. It was the second step in the "static kill," in which heavy mud was first pumped into the well from the surface to stop it from leaking crude into the gulf.