GROUTING MORTAR FOR CEMENTING HORIZONTAL HOLES Russian patent published in 2014 - IPC C09K8/467 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed grouting mortar comprises grouting Portland cement PTTS- IG-CC-1, fluid loss reducing agent HYDROTSEM, supersoftener - polyether carboxylate Melflux F or sulphuretted melamine-phenolic resin TSEMPLAST MF, antifoamer POLITSEM DF and setting accelerator, i.e. calcium chloride, and water. It differs from known compositions in that it includes extra mineral additive, i.e. metakaolin or Meta-Mix-1, or CON MIX SF1, or MIKRODUR, at the following ratio of components. Wt %: PTTS IG-CC-1 - 93.35-98.9, HYDROTSEM - 0.1-0.5, said csupersoftener - 0.05-0.3, POLITSEM DF - 0.1-0.3, said mineral additive - 0.5-1.0, calcium chloride - 0.1-2.0, water to water-cement ratio of 0.45-0.55.

EFFECT: higher efficiency of cementing, low filter properties, absence of water separation, required terms of cementation.

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