ENVIRONMENTALLY FRIENDLY ESTER-STRUCTURES AS VISCOSIFIER FOR OIL BASED DRILLING FLUIDS

摘要

The present invention relates to a mixture of esters obtainable by reacting components of an esterifiable composition with each other, wherein the esterifiable composition comprises at least one trimer fatty acid, at least one fatty acid and at least one hydroxy monocarboxylic acid and a production process of the mixture of esters. Furthermore, the present invention relates to environmental friendly, preferably oil based, drilling fluids comprising the above- mentioned mixture of esters, water and an organic phase and the use of said mixture as viscosifier for drilling fluids.