BP don't seem to have come up with a solution for the oil leaks. I would like to suggest building a box to lower over the pipe with an insulated jacket and evaporator inside. On the surface we would have a compressor & the piping going down down to the bottom would form the condensor.

We would have to get the oil down to - 30 to -50 Deg C to solidify to stop flow, then it can be cut and a new valve fitted.

Can this be done? ( assuming the ROVs & robotic manipulators can get the stuff in place)
Comments please