Retired Coast Guard admiral Thad Allen said Wednesday he has "high confidence" no more oil will leak from BP's Gulf of Mexico well. Hours earlier, BP announced that the well had reached "static condition" after heavy drilling mud was pumped into it.BP called the outcome a "significant milestone" in its efforts to permanently seal the well.The energy giant began the "static kill" procedure at 4 p.m. ET Tuesday, and workers stopped pumping mud in about eight hours after the effort achieved its "desired outcome". BP is monitoring the well to ensure it remains static and to determine whether further pumping of mud will be needed. "The well pressure is now being controlled by the hydrostatic pressure of the drilling mud, the desired outcome of the static kill procedure," BP said in a statement.