Key words: drilling slurry, polysaccharides, utilization, biodegradation, enzyme.
The authors experimentally studied the possibility of enzymatic split of polymer-containing drilling muds. The depolimerization ability of polysaccharide solutions that are most often used for preparation of drilling fluids is estimated under the influence of enzymes that are released in the process of vital activity of microorganisms. It is also evaluated the effect of the solutions pH on the rate of depolymerization. The efficiency of decomposition of waste drilling muds served as the deposition rate of the mineral. As sources of enzymes we used microorganisms developing at the beer pellet and prepared enzyme product. The results of the experiment show a significant increase in the rate of biodegradation of polymeric structures in solutions of carboxymethyl cellulose, guar gum. The xanthan resin solution was also much more resistant to biodegradation. The increase in the rate of biodegradation of polysaccharide solutions allows to reduce time of deposition of mineral particles by reducing the viscosity of the solution. Reduction of time of division of drilling sludge intensifies the process of their utilization.
