Petroleo Brasileiro S.a. - Petrobras

Antonio Carlos Ferreira Lino

Ricardo Wagner Capllonch

Fernando Borja Pereira

Carlos Alberto Dias Da Silva

Enio Costa Nunes

Marcelino Guedes Ferreira Mosqueira Gomes

A multi-diameter elastic sealing module for pigs, which operates in pipes having diameter changes, by being sent through the inside of a flexible or rigid pipe to move or draw various fittings and remove internal incrustations from the pipe, impelled by a fluid which flows inside said pipe. The sealing module comprises a sealing/impelling element (), a flexible core () covered by the sealing/impelling element (), a first clamping element (), a second clamping element (), a first fastening element () and a second fastening element ().

Multi-diameter elastic sealing module for pigs

The present invention relates to a device intended to be passed through a pipeline of variable diameter, propelled by a liquid flowing inside said pipeline. The device has an elongated cylindrical body () made of polymer foam, with a number of deep channels () equally spaced from each other, coiled around the length of the cylindrical body () of the pig (), beginning close to one end of the body () and ending close to the other end. These ends have a basically bulled-nosed shape, conferring a symmetrical aspect. Structural cleaning elements (), not interconnected, are inserted inside the cylindrical body () of the pig. They are made of elastomeric material and have a central core () with spiral scraping extensions () of the same number as the deep channels () in the body () of the pig (). The spiral scraping extensions () are at an angle to the axis of the cylindrical body () of the pig () as well as to the scraping extensions () of the adjacent modules, inasmuch as they follow the configuration of the spiral channel ().

Structured foam pig

The present invention relates to a device for scraping the inner walls of a pipeline. The device comprises a flexible shaft, a plurality of groups of flexible radial scraping bars which are spaced apart and offset angularly so that the said bars are able to scrape substantially the entire inner surface of the said pipeline, and at least one flexible sealing module.

Modular multisize bidirection scraping device

The present invention relates to a device,for scraping the inner walls of a pipeline. The device has (i) a flexible shaft,of elastomeric material, (ii) a plurality of groups of flexible radial scraping bars,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,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.

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Rio de Janeiro, Brazil

Antonio Carlos Ferreira Lino