85749071
Oct 9, 2012
Oct 27, 2015
Chemical additives for drilling muds; chemical additives for oil well drilling fluid; chemical preparations for use in industry, namely, the oil well drilling industry; chemicals for use in the field of oil exploration and production; chemicals used in industry, namely, the oil well drilling industry; chemicals used in oil drilling; all the foregoing not for use in processes related to the separation of oil/gas from water
Chemicals