Chemicals for industrial use; chemical additives and compositions for use in drilling; chemicals for use in the oilfield industry; chemicals used in exploration of, drilling for, producing and transporting oil; chemicals for prevention and removal of organic deposits, namely, paraffin, asphaltene's, gas hydrates, residues in crude oil; chemical products namely, inhibitors of organic deposits for use in the petroleum and mineral oil industry; chemicals for inhibiting and preventing corrosion of metallic surfaces; chemicals for refinery use

'addit':6 'asphalten':41 'chemic':1,5,13,20,31,49,65,74 'composit':8 'corros':70 'crude':47 'deposit':38,55 'drill':12,25 'explor':23 'gas':43 'hydrat':44 'industri':3,19,64 'inhibit':67 'inhibitor':52 'metal':72 'miner':62 'name':39,51 'oil':30,48,63 'oilfield':18 'organ':37,54 'paraffin':40 'petroleum':60 'prevent':33,69 'produc':27 'product':50 'refineri':76 'remov':35 'residu':45 'surfac':73 'transport':29 'use':4,10,15,21,57,77

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