Anvendelsen av utvalgte esteroljer i vannbaserte borespylinger av typen olje/vann-emulsjoner samt tilsvarende borespylevæsker med forbedret ökologisk godtagbarhet

摘要

The description relates to the use of water-emulsifiable esters of saturated and/or unsaturated carboxylic acids with up to 36 C atoms, which are liquid or at least plastically deformable at the working temperature and have flash-points of at least 80 DEG C, and mono and/or polyvalent alcohols as at least the major component of the dispersed oil phase of water-based O/W emulsion drilling fluids which are suitable for the environmentally acceptable exploitation of geological formations and may, if desired, contain insoluble, finely divided fillers to form water-based O/W emulsion drilling muds and/or further additives like emulsifiers, fluid-loss additives, wetting agents, alkaline reserves and/or aids for the inhibition of highly water-sensitive drilled rock.