Lubricating coating composition suitable for lubrication of...

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

2005-03-22

2005-03-22

Bochna, David (Department: 3679)

Pipe joints or couplings

Particular interface

Tapered

C285S094000

Reexamination Certificate

active

06869111

ABSTRACT:
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 5-40 micrometers.

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