EMULSIFIER BASED ON POLYAMINES AND FATTY ACID/MALEIC ANHYDRIDE

摘要

The present invention generally relates to a polyamide emulsifier obtainable by reacting a polyamine with a fatty acid and an anhydride, preferably maleic anhydride, to a drilling fluid composition that comprises said emulsifier and to a method of drilling a borehole into a subterranean formation utilizing the drilling fluid composition of the invention.