Composition, and threaded connection for pipes or tubes including lubricant coating layer formed from the composition
AssigneesNippon Steel Corporation, Vallourec Oil and Gas France
InventorKunio Goto
Life of this patent
Estimating the term…
Abstract
The composition according to the present embodiment is a composition for forming a lubricant coating layer on a threaded connection for pipes or tubes, and contains Cr2O3, a metal soap, a wax and a basic metal salt of an aromatic organic acid. The threaded connection for pipes or tubes according to the present embodiment includes a pin and a box. The pin and the box each include a contact surface including a threaded portion. The threaded connection for pipes or tubes includes, as an outermost layer, a lubricant coating layer formed from the aforementioned composition on at least one of the contact surfaces of the pin and the box.
Claims20
A composition for forming a lubricant coating layer on a threaded connection for pipes or tubes, the composition containing:
- Cr2O3,
- a metal soap,
- a wax, and
- a basic metal salt of an aromatic organic acid.
Dependencies are inferred from the claim text.