COMPOSITION OF SEPARATING PISTON FOR CLEANING PIPELINES, FOR SEPARATING FLUIDS Russian patent published in 2003 - IPC

FIELD: oil production industry branch, namely pipeline transportation of oils and oil products, possibly separating fluids at successive pumping and displacing one fluid by means of another, removing deposits out of pipelines. SUBSTANCE: composition of separating piston contains at predetermined quantity relations: polyacrylamide, cross-linking agent and water and in addition it contains oil products or light oil, alkali metal salt or alkali-earth metal salt or their mixture; as cross-linking agent it contains mineral salt of polyvalent metal. EFFECT: enhanced quality of sealing cavity of pipeline at cleaning it and at separating fluids by means of separating piston with enhanced technological properties. 2 cl, 1 dwg, 4 ex