ADDITIVE TO DRILL FLUID ON OPTIBUR WATER BASE Russian patent published in 2012 - IPC C09K8/35 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to drilling of oil and gas wells, and namely to anti-adhesive additives to drill fluids on water base in order to prevent packing formations at drilling of plastic mine rocks. Additive to drill fluid on water base contains the following components, vol. %: emulsifier 2-10, water-repelling agent 0.2-2, compound ethers of monocarboxylic acids with the number of carbon atoms up to 24 and monoatomic alcohols and/or polyalphaolefms, and/or oil derivatives are the rest. As emulsifier, the above additive can contain hydroxyethylated fatty acid with 6-7 moles of ethylene oxide Stearox-6 or diethanol amide of fatty acids, or hydroxyethylated fatty amine with 6-7 moles of ethylene oxide, or monoalkyl ether of polyethylene glycol based on fatty acid with 6 moles of ethylene oxide, or hydroxyethylated alkyl phenol with 4-9 moles of ethylene oxide, or hydroxyethylated natural higher fatty alcohols of fractions C₁₂-C₁₄ with 2-7 moles of ethylene oxide. As water-repelling agent, the above additive can contain mixture of imidazolins with admixture of aminoamides or alkylbenzyldimethylammonium chloride, or mixture of aminoalkylammonium of chlorides, or monoalkylamines, or mixture of polyalkylpyridons, or benzosulphonate (alkyldioxyethylene)-methylmethyldiethylammonium.

EFFECT: improvement of water-repellent, antifriction and surface active surfaces of drill fluids; formation of environmentally sound non-polar layers on surfaces of elements of layouts of bottom of drill column and mine rock.

2 tbl, 4 ex, 1 dwg