Multisize bidirectional scraping device
AssigneePetroleo Brasileiro S.A. - Petrobras
InventorsAntonio Carlos Ferreira Lino, Marcelino Guedes Ferreira Mosqueira Gomes, Fernando Borja Pereira
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Abstract
The present invention relates to a device 10 for scraping the inner walls of a pipeline. The device has (i) a flexible shaft 16 of elastomeric material, (ii) a plurality of groups of flexible radial scraping bars 14 which are spaced apart and offset angularly so that the bars are able to scrape substantially the entire inner surface of the pipeline, and (iii) a flexible covering 12 which coats the entire assembly formed by the said flexible shaft and by the bars, with the exception of the outer ends of the bars.
Claims16
A multisize bidirectional scraping device for use in removing material adhering to the inner walls of a pipeline, said device being able to be moved along the pipeline by means of the actual flow of the fluid flowing, wherein it comprises:
- a flexible shaft of elastomeric material having two ends;
- a plurality of groups of flexible radial scraping bars secured to said flexible shaft which are spaced apart and offset angularly so that outer ends of said flexible radial scraping bars are able to scrape substantially the entire inner surface of said pipeline;
- and
- a flexible covering which covers the entire assembly formed by said flexible shaft and by said bars, with the exception of the outer ends of the bars.
Dependencies are inferred from the claim text.