Threaded component for seizure-resistant tubular threaded joint
AssigneesVallourec Mannesmann Oil & Gas France, Condat S.A.
InventorDaniel Petelot
Life of this patent
Estimating the term…
Loading patent…
AssigneesVallourec Mannesmann Oil & Gas France, Condat S.A.
InventorDaniel Petelot
Estimating the term…
The invention concerns a threaded component for a seizure-resistant tubular threaded joint wherein a lubricating substance is deposited in a thin film on at least the surface of the threads of the threading, said surface being treated to adsorb said lubricating substance. The lubricating substance consists of a homogeneous mixture of a) a thickening agent; b) a set of extreme-pressure additives physically and chemically compatible with the thickening agent and comprising at least an extreme-pressure additive with chemical action called chemical EP additive and capable of being used at Hertz pressures not less than 1000 Mpa's; c) an oil. The proportions of the constituents of the lubricating substance are selected such that said lubricating substance has a consistency capable of ensuring a self-induced and film-forming lubricating process. The invention also concerns a method for producing the thin film.
A male or female threaded element (2) for a threaded tubular connection that is resistant to galling, comprising a respective male or female threading (104, 204), a lubricating substance being deposited as a thin layer (22) on at least the surface (14, 16, 18, 20, 54, 56, 58, 60) of the threads (12, 52) 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 method for producing a thin layer of a lubricating substance on a male or female threaded element for a galling-resistant threaded tubular connection, the threaded element comprising a respectively male or female threading, the lubricating substance having an adhesive pasty consistency, a film-forming nature and being capable of ensuring a self-fed lubricating regime, in which:
Dependencies are inferred from the claim text.