The invention concerns an apparatus for analysing water chemistry. According to the invention, the apparatus is adapted to operate downhole and comprises a colouring agent supply device for supplying a colouring agent to a water sample, the colour of the water sample thus supplied being indicative of...http://www.google.es/patents/US7339160?utm_source=gb-gplus-sharePatente US7339160 - Apparatus and method for analysing downhole water chemistry
Apparatus and method for analysing downhole water chemistry
