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Construction work is proceeding smoothly on the first of two relief wells to plug the oil leak in the Gulf of Mexico. It's still expected to be finished in August.
Drilling on the well began in early May and is ahead of schedule. BP said the first relief well is fewer than six meters from the side of its blown-out well.
BP's plans to drill further down and intercept the blown-out well at the bottom.
Once intercepted, BP intends to pump in heavy drilling fluid to stop the oil flow and then plug the leak.
Drilling will stop every seven meters or so to allow BP to use sensors to make sure that the relief well is on the right path.