The use of selected fatty alcohols and mixtures thereof with...

Details The use of selected fatty alcohols and mixtures thereof with... The use of selected fatty alcohols and mixtures thereof with...

C - Chemistry, Metallurgy

09

K

C09K 8/20 (2006.01)

Patent

CA 2272252

The invention relates to the use of straight chain and/or branched fatty alcohols with at least 12 C-atoms in the molecule and/or the use of the mixtures of such fatty alcohols with carboxylic acid esters as an additive with a lubricant effect in water-based drilling fluid systems for the use thereof in soil exploration. The fatty alcohol based lubricant or lubricant systems are especially suited for use in water-based alkaline silicate drilling fluid systems, characterized in a manner known per se by relatively high pH values of the aqueous drilling fluid system. The inventive additives combine a lubricant effect with antifroth action or prevention of undesired foam formation.

L'invention concerne l'utilisation d'alcools gras à chaîne linéaire et/ou ramifiée comportant au moins 12 atomes de C dans la molécule et/ou l'utilisation des mélanges de tels alcools gras avec des esters d'acide carboxylique comme additifs à effet lubrifiant dans des systèmes de fluide de forage à base d'eau, pour leur utilisation dans l'exploration de sous-sols par sondage. Les lubrifiants à base d'alcools gras ou les systèmes de lubrifiants s'utilisent notamment dans des systèmes de fluide de forage au silicate alcalin à base d'eau, qui se caractérisent de manière connue en soi par un pH comparativement élevé du système de fluide de forage aqueux. Les additifs obtenus selon l'invention allient l'effet lubrificateur à l'action antimousse ou à l'inhibition de la formation indésirable de mousse.

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