1.
n. [Drilling Fluids]
A solvent used with water to
break the
emulsion of an oil-base or synthetic-base
drilling fluid to prepare the sample for chemical titrations to determine lime, calcium or chloride content according to
API testing procedures. PNP is an abbreviation for propylene
glycol normal propyl ether. It is an environmentally friendlier replacement of a
xylene-isopropynol mixture previously used in certain titrations.