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Priority to OA59178ApriorityCriticalpatent/OA08648A/en
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E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
E21B21/06—Arrangements for treating drilling fluids outside the borehole
E21B21/068—Arrangements for treating drilling fluids outside the borehole using chemical treatment
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OA59178A1987-08-141987-08-14Electrochemical method for reducing the viscosity of polymer viscosified, halide containing,aqueous solutions.
OA08648A
(en)
Hyaluronic acid associates, composition containing them, process for preparing the composition, process for preparing zinc hyaluronate aqueous solution