Be it in Space, or on the seabed of the Gulf of Mexico, you always need a plumber. Congratulations to all BP engineers for the good work and using ideas from outside the company. I am still waiting to see if the relief wells are going to demonstrate that the principal well is not damaged and can be plugged. [Update: July 17th, it looks like the well integrity is still a concern as pressure does not rise as high as expected ]
For kicks here are some of the videos of the phase separators we demonstrated that were designed for microgravity in mind but could easily be used in a phase separation task with oil and water.