B - Operations – Transporting – 08 – B
Patent
B - Operations, Transporting
08
B
15/12
B08B 9/04 (2006.01)
Patent
CA 1151820
ABSTRACT A pig for the removal of ferromagnetic debris from the internal surface of a pipeline comprises a plurality of large area pole pieces 11 of hard ferromagnetic material mounted on low reluctance spacers 16 so that the spacing of poles of opposite polarity is approximately equal to the spacing of the pole pieces from the nominal position of the internal surface of the pipeline.
374509
Blake Cassels & Graydon Llp
Pipeline Integrity International Limited
LandOfFree
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