Also useful as polymeric drag reducing units are low molecular weight negatively charged polysaccharides such as carboxymethyl cellulose, carboxymethyl guar, carboxymethylhydropypropylguar and the like as well as low molecular weight, water soluble, maleic anhydride copolymers, such as available under the trade designation Daxad??? 31, or sodium methacrylate polymers and copolymers such as availab