GROUTING MORTAR Russian patent published in 2008 - IPC C09K8/467 

FIELD: gas and oil industry.

SUBSTANCE: invention relates to grouting mortars used in cementing casing strings in gaseous, gas-condensate or petroleum holes in zone of productive seam at moderate temperatures. Proposed grouting mortar comprises the following components, wt.-%: grouting Portland cement, 64.41-66.24; sulfacell, 0.13-0.40; microsilica MK-85, 0.33-1.99, and water, 33.20-33.30. Invention provides preparing grouting mortar of reduced water yield in face conditions and with simultaneous enhance of strength of cohesion of cement stone with a casing string.

EFFECT: improved and valuable properties of grouting mortar.

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