Water is a massive by-product when drilling for oil. The good news is that this water can be treated and purified for re-use. The bad news – for oil companies – is that the water must be cooled down before a water recycling plant will accept it. If the water isn’t cool enough, the oil company faces a hefty fine. An oil company in the USA was on the brink of shutdown because it was struggling to cool the water to an acceptable temperature. It needed robust cooling that would work during severe winters and extremely hot summers.