GALLING-RESISTANT THREADED ELEMENT FOR THREADED PIPE CONNECTION

摘要

A THREADED ELEMENT FOR A THREADED PIPE CONNECTION IS DESCRIBED IN WHICH A LUBRICATING SUBSTANCE IS DEPOSITED AS A THIN LAYER AT LEAST ON THE SURFACE OF THE THREADS OF THE THREADING, THIS SURFACE BEING TREATED TO ADSORB OR ABSORB SAID LUBRICATING SUBSTANCE.THE LUBRICATING SUBSTANCE IS CONSTITUTED BY A HOMOGENEOUS MIXTURE OF:A) A THICKENING AGENT;B) A SET OF EXTREME PRESSURE ADDITIVES THAT ARE PHYSICALLY AND CHEMICALLY COMPATIBLE WITH THE THICKENING AGENT AND COMPRISE AT LEAST ONE EXTREME PRESSURE ADDITIVE WITH A CHEMICAL ACTION TERMED A CHEMICAL EP ADDITIVE THAT IS CAPABLE OF USE AT HERTZ PRESSURES OF 1000 MPA OR MORE; AND C) AN OIL.THE PROPORTIONS OF THE CONSTITUENTS OF THE LUBRICATING SUBSTANCE ARE SELECTED. SO THAT THE LUBRICATING SUBSTANCE HAS A CONSISTENCY THAT ENSURES A SELF-FED LUBRICATION REGIME AND A FILMFORMING NATURE.A METHOD FOR PRODUCING THE THIN LAYER IS ALSO DESCRIBED.(FIG 10)