C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/34 (2006.01)
Patent
CA 2047706
-27- The invention describes the use of selected esters, fluid at room temperature and with flash points above 80°C, from monocarboxylic acids of synthetic and/or natural origin with 6 to 11 carbon atoms and mono- and/or polyfunctional alcohols as the oil phase or a component of the oil phase of invert drilling mulls, which are suitable for environment- friendly development of petroleum and natural gas deposits and in a continuous oil phase contain a dispersed aqueous phase together with emulsifiers, weighting agents, fluid-loss additives and preferably further conventional additives. In a further embodiment the invention relates to invert-drilling fluids of the types mentioned, which ara characterized in that the oil phase contains esters of monocarboxylic acids of synthetic and/or natural origin with 6 to 11 carbon atoms and with mono- and/or polyfunctional alcohols preferably in admixture with other components from the class of ecologically acceptable compounds.
Burbach Frank
Herold Claus-Peter
Mueller Heinz
Neuss Michael
von Tapavicza Stephan
Borden Ladner Gervais Llp
Cognis Deutschland Gmbh & Co. Kg
Henkel Kommanditgesellschaft Auf Aktien
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