G - Physics
01
B
33/182
G01B 5/20 (2006.01) F16L 55/28 (2006.01) G01B 5/207 (2006.01)
Patent
CA 1294779
BEND DETECTOR PIG Abstract A pipeline bend detector pig for measuring the changes in direction of a pipeline having a first pig body assembly with an imaginary longitudinal axis and spaced apart resilient cups for supporting the pig body assembly in a pipeline so that the axis thereof is at least approximately the axis of the pipeline and for impeding flow of fluid past the pig so that the pig is propelled by fluid flow through the pipeline, and a second pig body assembly also having an imaginary longitudinal axis and means for support thereof within a pipeline so that the axis thereof Is at least approximately the axis of the pipeline, a universal joint connecting the front end of the second pig body assembly to the rear end of the first pig body assembly and an integrator plate and finger assembly with the first pig body assembly arranged so that the fingers are deflected upon the deflection of the internal wall of the pipeline to thereby deflect an integrator plate, an instrument responding to the deflection of the integrator plate, and cables connecting at least three of the fingers to points on the second pig body assembly spaced from the longitudinal axis so, that as the axis of the second pig body is deflected at an angle relative to the axis of thefirst pig body, the cables pull on the fingers, deflecting the integrator plate and providing a record of the angular deflection of the second pig body relative to the first pig body which is indicative of a change of direction of the pipeline.
612070
Smart & Biggar
Tdw Delaware Inc.
LandOfFree
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