Carboxymethyl guar based drilling fluids
作者： Robert Rein Flat No. Pas , Cheng-Fa Lu , Carl Andrew Lukach
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摘要: Disclosed are (1) drilling fluid compositions consisting essentially of an aqueous medium selected from the group fresh and tap water, natural synthetic sea brine, carboxymethyl guar having a degree substitution (D.S.) 0.1 to 0.4; (2) D.S. 0.4, metal salt water-soluble carbonates bicarbonates; (3) bicarbonates, noncarbonate polyvalent salt.
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