Underwater corrosion locater

Details Underwater corrosion locater Underwater corrosion locater

1998-04-07

1999-11-30

Williams, Hezron

Measuring and testing

Inspecting

73623, 738665, G01M 1900

Patent

active

059922460

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.

REFERENCES:
patent: 4888745 (1989-12-01), Walther et al.
patent: 4951263 (1990-08-01), Shope
patent: 5084764 (1992-01-01), Day

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