CEMENTING COMPOSITION Russian patent published in 2007 - IPC C09K8/467 

FIELD: cementing compositions for cementing wells in oil and gas industry.

SUBSTANCE: cementing solution includes cement, water and admixture, as admixture the solution contains incidental product from geptyl production, in mass %, sulfurous sodium - Na₂SO₄ 95,5-97,0, sodium nitrate - NaNO₃ 0,5-1,0, sodium chloride NaCl 0,6-1,2, sulfurous calcium - CaSO₄ 0,4-1,0, sodium nitrite - NaNO₂ not more than 0,5, iron oxide Fe₂O₃ not more than 0,03, magnesium ions Mg²⁺ not more than 0,1, water-insoluble remainder not more than 0,4 with following ration of components, mass parts: cement 100, aforementioned side product of geptyl production 2,0-5,0, water 40-50.

EFFECT: increased well cementation quality due to usage of plastic cement solution with controllable time of stiffening; high hardness and adhesion properties of cement stone.

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