FIELD: oil producing industry, particularly, transportation of fluids through pipelines. SUBSTANCE: composition may be used in cleaning of internal cavities and surfaces of pipelines and simultaneous prevention of mixing of fluids in their successive pumping. Composition contains polyacrylamide, chromium-potassium alum, potassium bichromate and water. EFFECT: increased cleaning and separating capacities of composition, reduced labor input of its preparation and reagents consumption. 2 tbl, 4 ex
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