Geometrical instruments – Area integrators – Electrical
Patent
1974-07-19
1976-03-02
Aegerter, Richard E.
Geometrical instruments
Area integrators
Electrical
33178E, 33178F, E21B 4708, G01B 512, G01B 712
Patent
active
039408558
ABSTRACT:
A pipeline pig is provided which is especially adapted for use in conjunction with laying offshore pipelines in that it detects and indicates dents, and other disconformities in the nominal cross-sectional configuration of the pipeline which may occur as a result of the laying of the pipeline. It employs a plurality of prolate spheroid rollers arranged to secure substantially full circle coverage of the pipeline and yet only a minor portion of the length of the rollers will be normally in contact with the pipeline thereby reducing the wear on the remaining portions of the rollers and increasing the ease with which the pig can be towed along the pipeline. In another aspect, a system is provided in which a pig includes with a means of sensing a condition along the pipeline and a memory means for storing the output of the detecting means. The system also includes a readout means located remotely from the pig and transmission means connecting the memory means to the readout means for periodically reading out the output stored in the memory means within the pig while the latter is within the pipeline.
REFERENCES:
patent: 2030244 (1936-02-01), Cox
patent: 2567548 (1951-09-01), Chaney et al.
patent: 2810203 (1957-10-01), Bachofer
patent: 3685158 (1972-08-01), Planche
Kendall Robert L.
Payne Larry D.
Ver Nooy Burton
Aegerter Richard E.
Eickenroht Marvin B.
Hyer W. F.
Stearne Richard R.
T. D. Williamson Inc.
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