Lubricating coating composition suitable for lubrication of...

Details Lubricating coating composition suitable for lubrication of... Lubricating coating composition suitable for lubrication of...

F - Mech Eng,Light,Heat,Weapons

16

N

F16N 15/00 (2006.01) C09K 3/10 (2006.01) C10M 103/06 (2006.01) C10M 107/00 (2006.01) C10M 111/04 (2006.01) C10M 159/20 (2006.01) E21B 17/042 (2006.01) F16L 15/00 (2006.01) F16L 55/00 (2006.01)

Patent

CA 2430533

A lubricating coating composition in which at least one basic lubricant selected from a basic sulfonate, a basic salicylate, and a basic phenate is dissolved in a volatile solvent is applied to the frictional surface of a box and a pin constituting a threaded joint for oil well pipes. The composition may further contain one or more of a thermoplastic resin powder, another lubricant, and an extreme pressure agent. The surface roughness of the frictional surfaces preferably has an Rmax in the range of - -40 micrometers.

L'invention se rapporte à une composition de fabrication d'un film lubrifiant, qui comporte une base dans laquelle est dissoute au moins une huile basique sélectionnée parmi les sulfonates basiques, les salicylates basiques et les phénates basiques. On applique cette composition sur la surface de frottement d'une partie femelle et/ou d'une partie mâle d'un assemblage par vissage de manière à former un film lubrifiant. Ladite composition peut par ailleurs contenir une ou plusieurs résines thermoplastiques particulaires, d'autres huiles et des additifs extrême pression. Les pièces à coupler possèdent de préférence une rugosité de surface comprise entre 5 et 40 mu m en terme de Rmax.

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