US Patent 10537861 In-line well fluid eduction blending

A system and method of wellbore operations that uses an eductor unit for introducing additives into a moving fluid stream to form a mixture. The mixture is used as a completion drilling fluid for drilling through plugs installed in a wellbore. Example additives include polymers, such as friction reducers, viscosifiers, potassium chloride, polysaccharide, polyacrylamide, biocides, lubricants, long chain polymer molecules, and the like. The fluid is primarily fresh water and/or brine water, and acts as a motive fluid in the eductor unit for drawing the additive into the eductor unit. Forming the mixture in the eductor unit which is injected into the wellbore.