DRILLING COMPLEX REAGENT FOR WATER-BASED FLUIDS Russian patent published in 2016 - IPC C09K8/35 

FIELD: oil and gas industry.

SUBSTANCE: drilling complex reagent for drilling fluids on water base is prepared by mixing light tall oil, glycols, flotation reagent-oksal, alkali, oxyethylated fatty alcohols C₁₂-C₁₄, head impurities concentrate and intermediate fraction of ethyl alcohol from food raw material at temperature 60-65°C for 2-2.5 h, with the following ratio of components, wt%: light tall oil 40-45; polyglycols 21-28; flotation reagent-oxal 11-14; alkali 3-7; oxyethylated fatty alcohols of fraction C₁₂-C₁₄ 3-6; head impurities concentrate and intermediate fraction of ethyl alcohol from food raw material 10-15.

EFFECT: improved antifriction, anti-sticking, water-repellent, anticorrosion and surface-active properties of clay and clay-free irrigating solutions, higher quality of opening of oil and gas producing formations due to improvement of permeability of porous space of collectors.

1 cl, 2 tbl, 2 ex