... that solvent co-injection potentially reduces bitumen recovery efficiency compared to steam-only methods. We wonder that the solvent co-injected with steam increases bitumen-water interfacial tension, increases slip velocity at bitumen-water interface and reduces Darcy permeability of bitumen. Experimental...

... to study the impact of each force on hole cleaning. Experimental results show that increase in drillstring rotational speed reduces apparent slip velocity but increases drag coefficient on the transported cuttings. Optimized values of the ratio of the pressure loss across the bit nozzles...