Oil-emulsion mud Definition


Oil-emulsion mud:

A water-base mud in which water is the continuous phase and oil is the dispersed phase.

The oil is spread out, or dispersed, in the water in small droplets, which are tightly emulsified so that they do not settle out.

Because of its lubricating abilities, an oil-emulsion mud increases the drilling rate and ensures better hole conditions than other muds.

Compare oil mud.