ORGANIC CLAY INHIBITOR FOR DRILLING MUD Russian patent published in 2017 - IPC C09K8/35 

FIELD: oil industry.

SUBSTANCE: invention relates to drilling of oil, gas and expendable wells, namely to organic clay inhibitors for drilling solutions. Organic clay inhibitor for drilling mud contains lubricant additive FK-2000 Plus consisting of fatty acids triglycerides of sunflower, maize, soya bean, rape oil with number of carbon atoms from 14 to 24 in amount of 50–80 wt%, neutralising agent in amount of 3–6 wt%, polyethylene glycol ether of monoizononylphenol with 6–12 monomer links in radical in amount of 5–30 wt% and water as the rest, Protamins 157 and a mixture of vegetable and mineral oils at a ratio from 1:1 to 1:9 with the following ratio of ingredients, wt%: lubricant additive Protamins-2000 Plus 4-8; Diproksamin 157 6–28; mixture of vegetable and mineral oil – the rest.

EFFECT: technical result – increased resistance of clay minerals against hydration and dispersibility when drilling with drilling solutions based on water, prevention of packing formations, reduced colloidal phase and better lubricating and anti-stick properties.

2 cl, 2 tbl