Threaded element for a threaded seizure-resistant tubular connection, threaded joint and a method for producing a thin layer of a lubricating substance on such threaded element

摘要

In the present invention, there is disclosed a male or female threaded element for a threaded tubular connection that is resistant to galling, comprising a respective male or female threading, a lubricating substance being deposited as a thin layer on at least the surface of the threads of the threading, said surface being treated to adsorb or absorb said lubricating substance, characterized in that the lubricating substance is a homogeneous mixture of: a) a thickening agent; b) at least one extreme pressure additive, the extreme pressure additive or additives being physically and chemically compatible with the thickening agent and comprising at least one extreme pressure additive with a chemical action termed a chemical EP additive which 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 being selected so that said lubricating substance has a consistency capable of ensuring a self-induced and film-forming lubricating process. The invention also discloses a threaded joint and a method of obtaining a thin layer of a lubricant on threaded elements.