Forge welding tubulars
US7774917B2 · kind B2 · utility
17Cited by
54References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2006 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Nov 16, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53996
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Tubular ends are heated to a predetermined temperature above 1200 degrees Celsius and surrounded by a shield gas when the tubular ends are pressed together to form forge welded tubular ends. The forge welded tubular ends are then cooled down rapidly from said temperature above 1200 to at most 600 degrees Celsius within 3 minutes after the forge welding operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.