This system prevents oil floating up to the surface,it works on the specific gravity of the oil.
The oil find its way up into the balloon.On top of the are hoses connected which
run up to the surface.
The hoses and the balloon are secured with suction pile technology.
On the surface the floating hoses can be picked up by a tanker,and the oil can be safely removed from the balloon
The suction piles will hold the metal ring underneath the balloon.
The balloon is of an oil resistant material.
There is enough space between the balloon and the seabed,so the ROV can do its work.
The oil floats up and keeps the balloon in a upright position.
The hold back as demonstrated is necessary to reduce stress on the balloon