Abstract
The results of an experimental study of the effect of additives of the original and chemical by modified hydrolysis lignin on the rheological characteristics of water-based clay polymer drilling fluids are presented. The content of lignin in solutions varied from 0 to 5 wt. %. It was established by the method of X-ray fluorescence analysis, that the concentrations of toxic elements in the studied components of drilling fluids are at the level of background values and the highest static exchange capacity is observed for lignin samples converted into the sodium form during the modification process. It is shown that the introduction of modified hydrolysis lignin additives into clay based drilling fluids has a significant diluting effect. Therefore, the use of modified hydrolysis lignins as components of drilling fluids is a promising way of utilizing large-tonnage waste from biochemical plants.
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