Soft core pig

B - Operations – Transporting – 08 – B

Patent

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Details

B08B 9/04 (2006.01) F16L 55/26 (2006.01)

Patent

CA 2200792

A pipeline pig suitable for use in cleaning deposits and buildup from a pipeline is also particularly suited for applications wherein the pipeline has a series of bends or even right angle corners. The pig is suitable for bidirectional travel, having front and rear hemispherical noses. The pig is constructed in a manner that facilitates a greater degree of elongation and deformation than is possible with known pipeline pigs, while still providing the radially outward bias that is required to effectively scrape the sidewalls of the pipeline. A cover carries a plurality of metal studs arrayed about the cylindrical middle portion, and encloses an internal core. The core is formed in a mold from a mixture of resin and ISO, resulting in a pig having superior ability to elongate and deform, if needed, while still effectively scraping the sidewalls of the pipeline.

La présente invention a pour objet un râcleur de dépôts de matières accumulées dans les pipelines, notamment dans les applications où le pipeline comporte une série de coudes et même des angles droits. Le râcleur en question est capable de déplacements bidirectionnels, ses extrémités avant et arrière étant de forme hémisphérique. Le râcleur est construit de telle sorte qu'il autorise un degré d'allongement et de déformation supérieur à ce que permettent les râcleurs de pipeline actuellement en usage, tout en continuant d'exercer la pression radiale requise pour râcler efficacement la paroi interne d'un pipeline. Une enveloppe porteuse d'une pluralité de goujons métalliques disposés en réseau autour de la partie cylindrique centrale du râcleur enferme un noyau obtenu par moulage d'un mélange de résine et de matière ISO, procédé dont il résulte un râcleur possédant des capacités d'allongement et de déformation supérieures et qui conserve sa capacité de râcler efficacement la paroi interne d'un pipeline.

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