Duct assessment and leak sealing method for ducts...

F - Mech Eng,Light,Heat,Weapons – 16 – L

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F16L 55/48 (2006.01)

Patent

CA 2712869

The present invention relates to a method of assessing the condition of a duct along which a gas is flowing. The method comprises producing one or more sensor carrying elements, wherein the elements are formed to have selected parameters; introducing the sensor carrying elements into the flowing gas; and selecting the parameters of the sensor carrying elements such that the elements are transported along the duct by saltation. The present invention also relates to a method of reducing leakage through a leak in the duct. In this respect, the method comprises producing sealing elements, wherein the sealing elements are formed to have selected parameters; introducing a plurality of the sealing elements into the flowing gas; and selecting the parameters of the sealing elements such that the elements are transported along the duct by saltation and such that, at the locality of the leak, at least one of said sealing elements is captured by a pressure differential associated with the leak and is thereby drawn to and held in position at the leak for stemming or sealing it.

La présente invention concerne un procédé d'évaluation de l'état d'une conduite dans laquelle circule un gaz. Le procédé comprend la production d'un ou de plusieurs éléments dotés de capteurs, les éléments étant formés pour avoir des paramètres choisis; l'introduction des éléments dotés de capteurs dans le gaz en circulation; et la sélection de paramètres des éléments dotés de capteur de sorte que les éléments soient transportés le long de la conduite par saltation. La présente invention concerne également un procédé de réduction de pertes à travers une fuite dans la conduite. À cet effet, le procédé comprend la production d'éléments d'étanchéité, lesdits éléments d'étanchéité étant formés pour avoir des paramètres choisis; l'introduction d'une pluralité d'éléments d'étanchéité dans le gaz en circulation; et la sélection des paramètres des éléments d'étanchéité de sorte que les éléments soient transportés le long de la conduite par saltation et de sorte que, au niveau de l'emplacement de la fuite, au moins un desdits éléments d'étanchéité soit capturé par une pression différentielle associée à la fuite et est donc aspirée et maintenue en position au niveau de la fuite pour la boucher ou l'étanchéiser.

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