Pipeline corrosion sensing device and method
US4541278A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1984 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Apr 23, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides a sensing device and method to determine irregularities of a pipeline wall arising from corrosion, pitting, gouges, scale and deposits, and dents causing out of round conditions. This sensing device may be carried through a pipeline by a pipeline pig and comprises radial, movable spring-loaded sensing fingers adapted to continuously contact the pipeline inner surface, said sensing fingers preferably being secured to a fluid-tight drum. The sensing fingers are acoustically connected to one or more microphones, which may be confined within the interior chamber of the fluid-tight drum. The microphones, in turn, are electrically connected to a recording device for recording the audio signal the sensing fingers make as they move through the pipeline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.