Pipe flow of water-in-crude oil emulsions: Effective viscosity, inversion point and droplet size distribution

► Effective viscosity of six crude oil based emulsions was measured using a flow loop. ► Inversion point and in-situ droplet sizes were measured for flow induced emulsions. ► Measurements are analyzed based on the physicochemical properties of the crudes. ► Influence of crude properties on droplet formation, inversion and effective viscosity. ► Results about different behaviors that crude emulsions present during pipe flow.