FIELD: chemistry.
SUBSTANCE: compound action reagent for polysaccharide-based process liquids used in drilling and well workover contains the following in wt %: copper sulphate 0.8-2.0, polyvinyl alcohol 2.0-5.0, potassium iodide 1.0-2.5, water - the balance. In another version, the compound action reagent for polysaccharide-based process liquids used in drilling and well workover contains the following in wt %: copper sulphate 0.8-4.0, polyvinyl pyrrolidone 2.0-10.0, potassium iodide 1.0-5.0, water - the balance.
EFFECT: improved impervious properties of polysaccharide-based process liquids used in drilling and well workover, while maintaining high biocidal properties and stabilisation of the latter over time, wider range of compound action reagents.
2 cl, 8 ex, 1 dwg, 2 tbl
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