Process for lining a steel pipe for the subsea transport of fluids
US10648607B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2018 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Feb 22, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for lining a steel pipe for the subsea transport of fluids comprises machining of an annular cavity in an inner wall of the pipe to be lined. The cavity is set back longitudinally relative to an end of the pipe. The deposition by welding of a first resurfacing layer includes a corrosion-resistant metal alloy on the inside of the cavity. Surface machining of the first resurfacing layer is done to the internal diameter of the pipe. A liner made of corrosion-resistant steel alloy is introduced into the pipe. Deposition by welding includes at least one second resurfacing layer made of corrosion-resistant metal alloy on the inner wall of the pipe between the end of the liner in contact with the first machined resurfacing layer and the corresponding end of the pipe. Surface machining of the second resurfacing layer is done to the internal diameter of the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.