Patent ID: 9322503
Filing Date: 2016-04-26
CPC Classification: E03F,F16L

Claim Text:
1. A method for refurbishing an existing expandable pipe, the method comprising the steps of: (a) providing an existing expandable host pipe, the host pipe having an expandable interior wall with a known unobstructed internal diameter; (b) providing an expansion tool having expansion and retraction modes, the expansion tool adapted to generate isolated outward radial force when in expansion mode; (c) moving the expansion tool along a path inside the host pipe, the path having stations at which the expansion tool stops; (d) expanding the host pipe during step (c), step (d) further including, at each station: (e) inserting a rigid liner pipe inside the host pipe, the liner pipe having a rigid tubular profile prior to insertion and deployed to operationally replace the host pipe, an annular space created between the liner pipe and host pipe when the liner pipe is inserted inside the hostpipe; and (f) at least partially filling the annular space with grout.