An installation for collecting oils and fuels spilled at sea comprises one or several platforms in semi-flotation, each of which has a funnel for the entry in cascade of surface water. Around it there are several buoys or floaters which can be adjusted, and which are fitted on the support strips and operated by a descending cable which links the traction of all the buoys at a junction. The cable runs along side a flexible duct to a first tank reaching its bottom where it runs on to a pulley. In the return sector, it is fixed to a surface float to determine by the level in the tank the position of the buoys and, therefore, the height of the platform. From this tank, a pipe runs out to a second tank which has a surface buoy with another outlet pipe to an elevation pump. From there, there is an upward pipe which overflows the mixture in a tank, out of the water. There is an outlet pipe fox the oil with a stop cock. A further bottom pipe returns the clean water to the sea.
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