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Application filed by Sumitomo Metal IndfiledCriticalSumitomo Metal Ind
Publication of MX2007011935ApublicationCriticalpatent/MX2007011935A/en
A threaded joint for steel pipes for use in an oil well which has improved galling resistance and which is protected from rusting comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal<i/>contact portion. The contact surface of at least one of the pin and the box has a lower layer of a viscous liquid or semisolid lubricating coating comprising at least wax and a fatty acid alkaline earth metal salt and not containing a harmful heavy metal such as lead and an upper layer of a dry solid coating formed from an aqueous resin coating composition, an organic solvent type coating composition, or an ultraviolet curing coating composition.
MX2007011935A2005-03-292006-03-29Threaded joint for steel pipes.
MX2007011935A
(en)
Method of using intrinsically conductive polymers with inherent lubricating properties, and a composition having an intrinsically conductive polymer, for protecting metal surfaces from galling and corrosion
Lubricant oil compositions containing GTL base stock(s) and/or base oil(s) and having improved resistance to the loss of viscosity and weight and a method for improving the resistance to loss of viscosity and weight of GTL base stock(s) and/or base oil(s
Anti-corrosion composition comprising solvent, colloidal particles and at least one polyvalent metal ion where the weight ratio of metal ion to colloidal particle is greater than 0.001 to 0.1; and corrosion resistant material.