A skimmer is a device that is effective in collecting and removing oil from the surface of the water. Skimmers can be self-propelled, towed, and moored in the river currents, or event used from shore. Weir skimmers work like a dam and the oil flows over a wall and grabs on the other side. Oleophilic skimmers collect oil with belts, mop chains, or disks so that you can just scrape or squeeze the oil out of them. Suction Oil Skimmer in India works just like your household vacuum cleaner. It also sucks the oil up from the water surface and stored it in a tank such as a vacuum bag. Well, emptying one of these things out is a way bigger job than just tossing a full vacuum cleaner bag.