FIELD: oil and gas production industry, particularly well cementing for casing pipe leakage interval isolation.
SUBSTANCE: method involves supplying polyurethane pre-polymer having 2-10% isocyanate group content with the use of downhole technological assembly, which provides pre-polymer injection without primary property change; performing technological time-delay for pre-polymer foaming and hardening. Inner catalyst taken in amount of 3-3.5% by volume is added to polyurethane pre-polymer. The catalyst is glycerin or glycerin, which contains potash in amount of 1.0% by weight.
EFFECT: increased technological efficiency.
1 dwg, 2 tbl
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