The solution was a vacuum cap that sits over the whole unit, much like the glass globe surrounding the tungsten filament in a flashlight bulb.

FORBES: Pip-squeak Power Plant

As I understand it, the dome now sits several hundred yards away from the active well, as they seek solutions for dealing with the hydrates that have formed inside the containment dome that have made what they had hoped would be something that could cap and vacuum the oil, make it -- that that would be successful.

WHITEHOUSE: 5/10/10: White House Press Briefing