Threaded joint for pipes
US9321982B2 · kind B2 · utility
4Cited by
5References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 4, 2010 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Mar 17, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2080/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.