FIELD: oil and gas industry.
SUBSTANCE: plugging composition for insulation of lost-circulation zones includes the following, wt %: Portland cement 50-50.3, expansion agent - copolymer of carboxylic acids of acrylic row, their esters and salts 1-1.1, hardening accelerating agent - calcium chloride 2.4-2.6, water 37 and water-repellent admixture - silicone fluid on the basis of sodium methylsiliconate 9.3.
EFFECT: improving colmatation ability of plugging composition at elimination of absorptions of various intensity from partial to complete ones.
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| Title | Year | Author | Number |
|---|---|---|---|
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