Rotating electromagnetic field defect detection system for tubular goods
US6249119A · kind A · utility
7Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1999 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Oct 6, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/902
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The defect detection system of the present invention includes an encircling coil for providing a saturating DC magnetic fields to tubular goods. Also included is an encircling drive coil for applying a low level AC field using three-phase AC. Encircling pick up coils within the AC drive coils detect uniform, time varying magnetic fields to reveal defects within the tubular goods passing through the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.