Underwater pipelines

Details Underwater pipelines Underwater pipelines

1975-12-01

1976-11-23

Queisser, Richard C.

Measuring and testing

With fluid pressure

Leakage

G01M 324

Patent

active

039929230

ABSTRACT:
Leaks in gas filled pipelines are detected by moving a transmitter and receiver of ultrasonic pulses externally of the pipeline along a path 100 to 500 feet from the axis of the pipeline, transmitting pulses of 20 to 250 kilohertz and detecting the pulses reflected by gas bubbles with the receiver.

REFERENCES:
patent: 2997689 (1961-08-01), Johnson et al.
patent: 3222635 (1965-12-01), Simpkins et al.
patent: 3261200 (1966-07-01), Long
patent: 3289465 (1966-12-01), Parker
patent: 3409897 (1968-11-01), Bosselaar et al.
patent: 3622958 (1971-11-01), Tucker et al.

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