Magnetizers for pigging tools having rotational elements
AssigneeNovitech Inc.
InventorsRon THOMPSON, Michael YACHNIS, Jaidan BARRETTO
Life of this patent
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Abstract
Circumferential and axial magnetizers for a magnetic flux leakage pig. A magnet bar may comprise at least one magnet and may be configured to collapse radially inward to the shaft. Magnetizers may include a cushion disposed about the shaft and biasing the magnet bar against a pipe wall. A sensor head disposed between circuit poles at each polar end of the magnet monitors magnetic flux. The central shaft of a circumferential magnetizer or axial magnetizer may comprise a joint linking an additional smart pig module. One or more rotational elements may be disposed on the magnet bar.
Claims5
A method for replacing a rotational element on a magnet bar, comprising:
- loosening a securing means on a cover of a magnet bar;
- removing the cover from an insert configured to releasably retain a cover to reveal an axle;
- accessing the axle and removing a rotational element from the axle;
- installing a replacement rotational element onto the axle;
- replacing the cover to the insert;
- and
- tightening the securing means on the cover.
Dependencies are inferred from the claim text.