Oil leaking from the site of the sunken Deepwater Horizon is expected to reach the US coast sometime during the coming weekend. Most appears to be little more than surface sheen with little depth.
Attempts by several remotely operated vehicles, ROVs, have so far failed to close the Blow Out Preventer and oil continues to leak at about 1,000 barrels a day. Additional options are still being developed to trigger the BOP.
Two drillships, Transocean’s Development Driller 3 and Discoverer Enterprise are moving into position to drill relief wells and stop the leaks.
Construction has begun on a collection dome that will be deployed to the sea floor to collect and funnel oil as it escapes from the well, a method that has never been tried this deep before. The first rig to be used for drilling a relief or cut-off well arrived last night, several more are planned – a relief well would take several months to complete.