| 摘要 |
The invention describes the use of esters, which are fluid at room temperature and have flashpoints above 80 DEG C, selected from C1-15 monocarboxylic acids and/or mono or multifunctional alcohols as the oil phase or a component thereof in invert drilling muds which are suitable for the environmentally favourable extraction of petroleum or natural gas deposits and, in a closed oil phase, contain a dispersed aqueous phase together with emulsifiers, fillers, fluid loss additives and, if desired, other customary additives. In a further embodiment the invention relates to invert drilling muds of the aforementioned kind in which the oil phase contains esters of C1-15 monocarboxylic acids with mono and/or multifunctional alcohols mixed, if desired, with other components from the class of ecologically acceptable compounds. |
