| 摘要 |
FIELD: oil and gas industry.SUBSTANCE: in reagent preparation method for chemical treatment of drill mud tannin-containing substance is grinded up to size within range of 1-2 mm and mixed up during 2 hours in the closed oven at temperature of 90±5°C with sodium bicarbonate and water with the following ratio of components, by wt %: tannin-containing substance 64-73, sodium bicarbonate 20-30, water - the remaining share, thereupon at temperature of 100±5°C it is dried in the oven up to humidity level of 5-10%, and the obtained reagent is grinded up to size of 0.25-0.30 mm.EFFECT: improved efficiency in regulation of basic indices for drill mud, nonavailable negative impact on environment.2 tbl, 13 ex |
