SEALING LOW-TEMPERATURE PLASTIC GREASE FOR THREADED CONNECTIONS OF DRILL PIPES Russian patent published in 1999 - IPC

FIELD: drilling equipment. SUBSTANCE: grease increasing wear resistance and tightness of interlocks of drill pipes and casing strings contains, wt %: special-type synthetic oil 5-35, special-type additive 3-7, and sodium plastic grease - the balance, the latter being composed of: sodium soap of synthetic C₅- C₃₀-fatty acids 26, residual raffinate with viscosity 16 cSt at 100 C - 72.5, and graphite 1.5. EFFECT: increased adhesion and reduced coefficient of friction ensuring safer tightness of connections. 2 cl, 3 tbl, 9 ex