Crews working will carry out one more pressure test on BP's damaged well in the Gulf of Mexico before they're able to declare the well permanently sealed, officials say.
The test on the cement seal completed on Friday is the last step before the well can be declared "dead".
The well's closure will bring to an end a nearly five-month battle for BP after a rig exploded in April, killing 11 people and causing a massive oil spill, the BBC reports.
No oil has spilled since a temporary cap was placed on the well in mid-July.
The pressure test was expected to happen late on Saturday, in which engineers will exert 6,800 kilograms of pressure against the cement plug to make sure it will stay in place.
BP said earlier that when cementing is finished, the relief well would also be plugged and sealed.
