REPAIR AND INSULATING MOBILE COMPOSITION BASED ON MAGNESIAL BINDING SUBSTANCES (OPTIONS) Russian patent published in 2021 - IPC C09K8/467 

FIELD: oil and gas industry.

SUBSTANCE: inventions group relates to the oil and gas industry. Proposed is repair and insulating grouting composition based on magnesian binders for isolating zones of water and gas manifestation during drilling and repair of oil, gas and water wells according to the first option contains, wt%: magnesium oxide 16.40-32.22; magnesium chloride 12.91-32.22; gypsum binder 2.07-25.12; heptahydrate magnesium sulfate 0.92-1.27; sodium hexametaphosphate 0.10-2.62; ferric chloride 0.09-0.30 and / or manganese sulfate 0.70-3.36; fiber 1.73-5.44; water - the rest. Repair and insulating grouting composition according to the second variant contains, wt%: magnesium oxide 16.40-33.27; magnesium chloride 12.91-32.22; gypsum binder 0.6-2.07; sodium hexametaphosphate 0.10-2.62; hardening additive 5.21-10.32; heptahydrate magnesium sulfate 0.48-1.27; water - the rest; microspheres 13.44-22.76 over 100%.

EFFECT: invention increases the strength characteristics of the grouting composition, lightening the grouting composition.

7 cl, 2 tbl, 16 ex