POLYMER-EMULSION DRILLING MUD Russian patent published in 2017 - IPC C09K8/08 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry. The polymer-emulsion drilling mud comprises an integrated reagent Unidrill, consisting of organic acids, being plasticizers, water-repellents and inhibitors, where plasticizers are oxalic acid salts together with oxides of amphoteric metals, and water-repellents are oxalic acid salts together with oxides of amphoteric metals and salts of hydrobromic acid, and inhibitors are microgels, with the following ratio of mud ingredients: wt % rheology-Xhantan Gum 0.2-0.5;. filtering-Fitter Check 2-2.5; filtering-PAC-LV 0.5-1; inhibitor-MgO 0.5-2; calcium carbonate, 5-50; integrated reagent Unidrill 25-30; dispersion medium-water, the rest; lubricant SBU-DR-5-10 from the whole volume.

EFFECT: invention provides for reduction in drilling time, maintaining the stability of the drilling mud, environmental protection while reducing the cost of the drilling mud.

1 tbl, 1 dwg