Geometrical instruments – Gauge – Internal
Patent
1991-11-20
1993-04-27
Will, Thomas B.
Geometrical instruments
Gauge
Internal
335443, 335445, G01B 520
Patent
active
052050483
ABSTRACT:
A pipeline bend detector pig for measuring a bend in pipeline is disclosed, the pig having an elongated flexible body for transposition through the pipeline. The body has an imaginary central axis that substantially remains coaxial with the pipeline cylindrical axis as the body transverses the interior of the pipeline. First and second length-measuring cables are supported to the body, each in a radial plane of and spaced from the body central axis and spaced angularly from each other. Each length-measuring cable has one end affixed to the body and a free end. Each cable has spring tension applied to the free end thereof to keep the cable taunt. A variable electrical resistance element is actuated by the free end of each cable as the free ends of the cables are moved by bends in the pipeline. An odometer for measuring the distance of travel of the pig is provided. A solid state memory records the distance traveled and the occurrence of bends in the pipeline.
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Manley Johnny M.
Ralls Gene R.
Toomey Danny D.
TDW Delaware Inc.
Will Thomas B.
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