Chemicals used in oil drilling; Chemical additives for fracturing fluid for use in oil and gas wells; Chemical additives for oil well drilling fluids; Chemical additives for drilling muds; Chemical fracturing fluids for use in the oil and gas industry; Chemical preparations for scientific purposes, other than for medical or veterinary use; Chemical preparations for use in industry; Chemical preparations for scientific purposes; Chemicals for use in the biochemical and chemical industry; Chemicals for use in the field of oil exploration and production; Hydraulic fluid; Hydraulic fluids for general use; Industrial chemicals; Specialty chemicals, namely, chemical additives for general industrial use in the manufacture of a wide variety of goods