FIELD: oil and gas well building, particularly methods or devices for cementing, for plugging holes, crevices or the like.
SUBSTANCE: grouting mortar reagent includes 99.5-99.9% by weight of amorphous alumina and 0.1-0.5 % by weight of effusive rock-based additive. The grouting mortar comprises cement, water and above reagent taken in amount of 0.05-4.5 % by cement weight. The grouting mortar may additionally have fluid loss reducer, plasticizer and antifoaming additive. Above grouting mortar is used for well cementation.
EFFECT: increased efficiency of grouting mortar reagent used as structure-forming and accelerating agent and containing no aggressive component, namely chlorine ions; provision of grouting mortar expansion and free water retention, extended temperature range of grouting mortar usage, improved adhesion between cement stone and string and rock, possibility to obtain noncontracting cement stone having uniform structure, low porosity and increased corrosion resistance.
6 cl, 1 tbl, 8 ex
| Title | Year | Author | Number |
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RU2366681C2 |
