METHOD OF PREPARING GREASE FOR SEALING THREADED JOINTS Russian patent published in 2002 - IPC

FIELD: lubricants. SUBSTANCE: grease suited to joint-disjoint operations on casings, drill pipes, and tubings, including operations in corrosive hydrogen sulfide-containing media, is prepared by mixing, wt %: viscous lubricant 5-15, graphite 27-69, corrosion inhibitor 0.02- 3, polyfluoroethylene 5-15, and industrial oil 20-40. Homogenization of grease is achieved after continuous stirring observing condition: 60•10³<TtV<150•10³, wherein T is continuous stirring time, sec; t is temperature of grease, 0C; V average linear motion velocity during stirring, m/s. EFFECT: simplified technology when compared with greases on soap thickeners, increased heat resistance within a wide temperature range, and prevented wear and scratching of threaded joints in hydrogen sulfide-containing media. 1 tbl, 4 ex