FOERFARANDE FOER FRAMSTAELLNING AV HETEROPOLYSACKARID, PAO DETTA SAETT FRAMSTAELLT HETEROPOLYSACKARID, DESS ANVAENDNING OCH STAM

摘要

Process for preparing a heteropolysaccharide from strain NCIB 11883 and use of the latter e.g. as viscosity modifier in an aqueous system such as completion fluids, work over fluids, stimulation fluids, and preferably in drilling fluids and use in connection with well-treatments, and enhanced oil recovery.