G - Physics – 01 – B
Patent
G - Physics
01
B
33/161
G01B 3/26 (2006.01) G01B 5/12 (2006.01) G01B 5/28 (2006.01) G01N 19/08 (2006.01)
Patent
CA 1081941
A B S T R A C T An apparatus for measuring internal dimensions of a pipeline, consisting of a pig carried along by the flow of matter through the pipeline, fitted with a circular array of probes protruding outwards and spring-loaded, which can be pressed against the inner wall of the pipeline, in a radial direction, which probes are fitted with displacement pickups and which pig is equipped with apparatus for processing the signals from the displacement pickups and for recording the results of such processing, characterized in that the probes are arranged in pairs, one probe having a needle-shaped and the other a shoe-shaped extremity, each of which probes can move independently of the other in a radial direction, the extremities of each pair being near to each other, the two probes of a pair being spring-connected with the body of the pig and with each other, one displacement pickup being located between the body and the needle-shaped probe and one displacement pickup being located between the shoe-shaped and the needle-shaped probe.
283337
Bosselaar Hendrik
Oltmans Frank
Shell Canada Limited
Smart & Biggar
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