Claim: Dispersants in oil drilling aid in breaking up solids or liquids into smaller mediums, and for dispersing oil into the water, surfactants selected on hydrophilic-lipophilic balance numbers can be used.
Evidence: Dispersants in oil drilling aid in breaking up solids or liquids as fine particles or droplets into another medium. For dispersing (emulsification) of oil into water (or water into oils), surfactants selected on the basis of hydrophilic-lipophilic balance (HLB) number can be used.