REAGENT FOR AQUEOUS AND HYDROCARBON-BASED MUDS Russian patent published in 1994 - IPC

FIELD: boring of wells. SUBSTANCE: the oil-containing additive to muds has multifunctional properties. It is free of negative properties typical of petroleum, diesel fuel or CMAД, reduces stickiness of the mud cake in the clay mud; decreases subdivision of rock in the clay mud as regulate viscosity, static shear stress and filtration losses of the hydrocarbon-based reagent for mud within the wide range. An aqueous and hydrocarbon-based reagent for muds reduces stickiness of the mud cake in the clay mud; decreases the deformation of rock in the mud by 10.6 times; reduces the disjoining pressure in argillite in the mud by 1.96 times and increases the barite content in the hydrocarbon-based mud by 1.3 times (due to which fact density increases from 2200 tо 2520 kg/m³); reduces Engler viscosity by 2.3 times; reduces static shear stress by 23.5 times; cut down filtration losses at 80 C by 11.4 times. The reagent comprises 80.83-90.93 wt % a resin smudge extract derived form selective oil purification ; 18.21-8.30 wt % diesel fractions of petroleum; 0.96-0.77 wt % depressor such as calcium alkylphenolate. EFFECT: improved properties of the reagent.