FIELD: various technological processes.
SUBSTANCE: invention is intended for use in drilling, operation of hydrocarbon wells, transportation of oil and gas, transportation or storage of hydrogen, trapping carbon dioxide or geothermal power engineering. Tubular threaded element comprises metal main part (5) and at least one threaded end (3, 4) containing at least one threaded part (14, 15), wherein said threaded end (3, 4) comprises multilayer coating (10) on at least one part of the surface of threaded end (3, 4), characterized by that multilayer coating (10) comprises first layer (11) containing solid zinc-nickel coating electrodeposited on at least one part of threaded end (3, 4) surface, second converted oxalate layer (12) above first layer (11), third layer (13) containing polyurethane or epoxy matrix filled with solid lubricant particles, above second layer (12).
EFFECT: described is a solid lubricant for Zn-Ni coating on a pipe threaded element.
14 cl, 9 dwg
Authors
Dates
2024-10-02—Published
2022-09-06—Filed