VERWENDUNG AUSGEWAEHLTER EMULGATOREN AUF ETHERBASIS FUER OELBASIERTE INVERT-EMULSIONEN

摘要

New N-free emulsifiers for use in oil-based invert emulsions are partial ethers of lower polyfunctional alcohols with monofunctional alcohols containing at least 8 carbon atoms and/or their alkoxylates, preferably glycerin partial ethers. These emulsifiers can be used to make ecologically improved invert drilling fluids of the indicated type which are suitable for non-polluting extraction of geological deposits and have a closed oil phase containing a disperse aqueous phase together with usual additional adjuvants, such as emulsifiers, loading agents, thickeners, fluid-loss additives and alkali reserves.