Method and apparatus for removal of utility line and...

Details Method and apparatus for removal of utility line and... Method and apparatus for removal of utility line and...

E - Fixed Constructions

03

F

E03F 3/06 (2006.01) E21B 7/20 (2006.01) E21B 7/28 (2006.01) E21B 10/28 (2006.01) F16L 55/165 (2006.01)

Patent

CA 2219642

The present invention is directed to a method for removing a utility pipe or main and replacing the main with a polyolefin pipe. More specifically, the unique apparatus or system of the present invention includes a rotating head connected to a plurality of pipe joints to remove the old pipe, usually concrete or tile, by cutting, chipping and grinding. The head has an outer periphery of roller bits which cut, chip and grind the old pipe or earth into pieces which pass inwardly through the head. Behind the head is a non-rotating member which opens and packs the hole formed by the head for the replacement polyolefin pipe which is pulled into the hole by the member.

La présente invention concerne un procédé d'enlèvement d'un tuyau ou d'une canalisation d'amenée et de remplacement de ceux-ci par un tuyau en polyoléfine. Plus particulièrement, l'équipement ou système, qui est unique, de la présente invention, comprend une tête rotative reliée à plusieurs raccords de tuyau, pour enlever le vieux tuyau, qui est habituellement en béton ou en grès, par découpe, déchiquetage et broyage. La tête a un périmètre extérieur pourvu de trépans à molettes qui coupent, déchiquettent et broient le vieux tuyau ou la terre, donnant des morceaux qui traversent cette tête vers l'intérieur. Derrière elle se trouve un élément non rotatif qui ouvre et compacte le trou pratiqué par la tête pour le tuyau de remplacement en polyoléfine, et tire ce dernier dans le trou.

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