INFORMATIVE GROUTING MORTAR Russian patent published in 2013 - IPC C09K8/467 

FIELD: oil and gas industry.

SUBSTANCE: informative grouting mortar contains binding agent, liquid for pre-mixing and indicator additive; in addition, it contains regulating agent of process properties- superplasticising agent C-3, and retarding agent - nitrilotrimethylenephosphonic acid - NTP, binding agent - fine ground cement - Mikrodur or INTRATSEM, and indicator additive - water-soluble cadmium salt - cadmium chloride, sulphate, nitrate, bromide, iodide or their water-soluble mixture at the following component ratios, wt %: fine ground cement Mikrodur or INTRATSEM 100, water-soluble cadmium salt 10-120, liquid for pre-mixing 50-150, superplasticising agent C-3, 0.3-1, nitrilotrimethylenephosphonic acid - NTP 0.02-0.5.

EFFECT: enlarging the scope of application and increasing efficiency of grouting operations owing to enhancing informativity, improving manufacturing capabilities of grouting mortar, simplifying its preparation under field conditions and improved filtering capacity to low-permeable headers, microgaps and microcracks.

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