Method and apparatus for restoring a pipe or tunnel

Details Method and apparatus for restoring a pipe or tunnel Method and apparatus for restoring a pipe or tunnel

1994-12-05

1998-01-20

Taylor, Dennis L.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

138 97, 405156, F16L 100, F16L 5518

Patent

active

057095035

ABSTRACT:
A device for reducing deformation of a pipe or tunnel has a body portion having a surface for moving along and entirely inside an undeformed pipe. The surface tapers inwardly from a main body portion having a maximum transverse extent to a fore end. Attached to the fore end of the device is a towing eye for attachment to a towing cable so that the device may be moved through a pipe. Movement of the device through the pipe urges the deformed portion towards an undeformed configuration. In an embodiment of the device it draws a lining through the pipe so that simultaneous re-rounding of a pipe and lining is performed. In yet another embodiment a pre-liner is simultaneously deployed with the lining, the pre-liner being disposed in use between the pipe and the lining.

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