GROUTING MORTAR FOR CEMENTING AND SIDE SHAFTS WITH HORIZONTAL SECTIONS Russian patent published in 2016 - IPC C09K8/467 E21B33/138 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, particularly to drilling oil and gas wells, and can be used for attachment of oil and gas wells and side shafts with horizontal and inclined sections under conditions of normal temperature. Backfill composition as binding alumina cement and additionally contains quartz sand, unslaked lime, superplasticiser S-3, reagent-stabiliser and water loss reducer - 1 % solution of hydroxyethyl cellulose, antifoaming agent Penta-465 and water in following ratio, wt%: portland cement - 55-65, alumina cement - 10-20, unslaked lime - 5-10, quartz sand - 15-20, said superplasticiser - 1-1.3, hydroxyethyl cellulose - 0.2-0.3, said antifoaming agent - 0.05-0.1, water - balance.

EFFECT: technical result is improved quality and offshoots.

1 cl, 1 tbl, 6 ex