Internal geometry tool

Details Internal geometry tool Internal geometry tool

1981-09-23

1984-04-24

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33178F, G01B 712, G01B 728

Patent

active

044439482

ABSTRACT:
A pig for monitoring the internal surface profile of a pipeline carries a plurality of sensors to trace the surface as the pig traverses the pipeline. Output signals from the sensors are compared with an expected value and a reference signal generated when they differ by more than a predetermined amount. The sensor signals are recorded simultaneously with the reference signal.

REFERENCES:
patent: 2497990 (1950-02-01), Huber et al.
patent: 2649786 (1953-08-01), Goble
patent: 2815578 (1957-12-01), Broussard
patent: 2908085 (1959-10-01), Price et al.
patent: 3755908 (1973-09-01), Ver Nooy
patent: 3940855 (1976-03-01), Ver Nooy et al.
patent: 4186494 (1980-02-01), Edouard et al.

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