Drilling muds effective at high temperature

Details Drilling muds effective at high temperature Drilling muds effective at high temperature

C - Chemistry, Metallurgy

09

K

C09K 8/22 (2006.01) C09K 8/20 (2006.01) C09K 7/02 (1990.01)

Patent

CA 2093726

Aqueous drilling muds effective at high temperature containing complexes, preformed or formed in situ, of tetravalent zirconium with one or more organic acids, or relative salts, of general formula (I) (see formula I) where R1 and R2, which can be the same or different, represent -H, -COOH, -CH3, -CH2COOH or -CH(OH)COOH, or R1 and R2 jointly represent an oxo group (=O).

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