FIELD: oil and gas production.
SUBSTANCE: procedure consists in suppressing process of sodium chloride crystallisation on surface of drill string and casing by processing salt saturated drilling agent with inhibitor of sodium chloride crystallisation. This inhibitor includes anion-active surface active substances and mineral oil. Inhibitor is added into drilling agent at amount of 1.0-1.5 of vol % to volume of drilling agent.
EFFECT: raised efficiency of inhibiting effect.
2 cl
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