Underwater corrosion locater
US5992246A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Apr 7, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for identifying, locating and marking an underwater pipeline anomaly such as excessive pipe wall corrosion. An inspection tool is pulled through the pipeline with a cable. The cable length is precisely measured when a pipeline anomaly is detected, and a transmitter generates a signal representing the pipeline anomaly location. This measurement provides an accurate positioning system for deploying a mobile receiver, and the receiver identifies the transmitter signal for facilitating precise marking of the pipeline anomaly from the pipeline exterior. Accurate cable measurements are taken by a controller which monitors the magnitude and variations in cable tension and length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.