BP’s ruptured oil well in the Gulf of Mexico is expected to be permanently sealed by Sunday.
Adm Thad Allen, in charge of cleaning up the oil spill, has said a relief well, which has taken more than four months to drill, should intersect the damaged well later on Thursday.
A mixture of mud and cement will then be pumped in, permanently sealing it.
On Wednesday, the US said it would require oil firms to plug 3,500 non-producing Gulf of Mexico oil wells.
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