Importance

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Abstract

A metal brush useful in pipeline pigs, for example, in magnetic flux leakage tools or cleaning tools, a method of making the brush and pipeline pig comprising the brush. The brush has a metal bristle holder and a plurality of metal bristles, the ends of which are held in the bristle holder by being welded to each other and to the bristle holder by fusion welding. The bristle holder may be a tube, or a large metal structure with a hole or cavity. In one embodiment, the brush has a flat bottom surface, and is therefore particularly useful in MFL tools. The brush is not made with solder and therefore avoids many of the problems associated with using solder in pipeline applications, for both MFL and other pipeline applications.

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First Claim