FIELD: drilling of wells in petroleum refining and gas industries. SUBSTANCE: carboxymethylated lignocarbohydrate chemical reagent for drilling fluids is used in drilling fluids to regulate their properties. Carboxymethylated lignocarbohydrate chemical reagent comprises (wt %): 27-38 carboxymethylated cellulose; 15- 23 carboxymethylated lignin; 15-22 hemicellulose; 3-7 unsubstituted cellulose, lignin, hemicelluloses; 21-25 sodium chloride; 18.5-33.5 total content of carboxymethyl groups in the resulting carboxymethylated lignocarbohydrate chemical reagent. EFFECT: regulation of properties of drilling fluids and lower cost. 2 tbl
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Authors
Dates
1999-03-10—Published
1997-10-28—Filed