135381 ⎘
Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor; Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes; Dust eliminating or dust removing while drilling using exhaust air from the drilling motor for blowing off the dust at the borehole entrance
Composition comprising an alkoxylated amine compound and a carboxylic acid compound, use thereof in water in oil emulsions and process using the composition as or as part of a drilling fluid
#2Composition comprising an alkoxylated amine compound and a carboxylic acid compound, use thereof in water in oil emulsions and process using the composition as or as part of a drilling fluid