Tool for drilling through loosely-packed materials

Details Tool for drilling through loosely-packed materials Tool for drilling through loosely-packed materials

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 1/036 (2006.01) E21B 7/26 (2006.01)

Patent

CA 2704606

There is described a method of laying pipe (20) through a fill (12) of loosely packed materials, where the pipe is installed between a pointed front section (36) and a rear section (50) of a tool, and the rear section is subjected to a drive force in the longitudinal direction, so that the pointed section and the pipe is pushed into the loosely packed materials. The method is characterized by that in the event that the progress is halted due to an inadvertent hindrance in the loosely packed materials, the tool and the pipe connected thereto is pulled back by exerting a tractive force on a tractive means (80) connected to the pointed front section. Preferably the tractive means is a line (80) in the shape of a wire and/or a chain, fixed to the front section (32), where the line runs within the pipe connected to the rear section (50), and the tractive force is controlled by the tool operator.

L'invention concerne un procédé de pose de tuyau (20) à travers un remblai (12) de matériaux détassés, le tuyau étant installé entre une section avant pointue (36) et une section arrière (50) d'un outil, la section arrière étant soumise à une force motrice qui s'exerce dans la direction longitudinale pour pousser la section pointue et le tuyau à l'intérieur des matériaux détassés. Le procédé se caractérise en ce que, dans le cas où la progression est interrompue par un obstacle inattendu dans les matériaux détassés, l'outil et le tuyau raccordé à celui-ci sont retirés grâce à une force de traction exercée sur un moyen de traction (80) raccordé à la section avant pointue. De préférence, le moyen de traction est une ligne en forme de câble et/ou de chaîne fixée à la section avant (36) et s'étendant à l'intérieur du tuyau raccordé à la section arrière (50); et la force de traction est réglée par le manipulateur de l'outil.

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