| 摘要 |
"AQUEOUS DRILLING MUDS FLUIDIFIED BY MEANS OF ZIRCONIUM AND ALUMINUM COMPLEXES" Aqueous drilling muds are disclosed which contain, as fluidifier agent, one or more complexes, which may be either pre-formed or produced in situ, selected from: -- tetravalent zirconium and one or more organic acids, or their salts, having the general formula (I) (I) wherein R1 and R2, which may be the same or different from each other, represent -H, -COOH, -CH3, -CH2COOH, -CH(OH)COOH; -- aluminum citrate.
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