Joining expandable tubulars
US7181821B2 · kind B2 · utility
12Cited by
52References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2003 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Mar 15, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4994
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of joining expandable tubulars includes joining the tubulars by forge welding and flushing a reducing flushing gas around the heated tubular ends during at least part of the forge welding operation such that oxides are removed from the forge welded tubular ends and the amount of irregularities between the forge welded tubular ends is limited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.