Patent ID: 7094308

Claim:
A method for sealing an annular space created between a rehabilitative conduit liner and a surrounding, coaxial conduit, said method comprising the steps of: (a) restricting the flow of liquid through a conduit section; (b) inserting a remote sensing device in said conduit section; (c) moving said remote sensing device through said conduit section to locate a lateral line connection; (d) applying an expandable material to an interior surface of the conduit at the location of said line connection; (e) withdrawing the remote sensing device from said conduit section; (f) inserting the rehabilitative conduit liner into said conduit section; (g) causing the expandable material to expand and form a substantially waterproof pressure seal between said rehabilitative conduit liner and said interior surface of the conduit; (h) inserting a conduit liner cutting device into said rehabilitative conduit liner; (i) cutting an opening in the rehabilitative conduit liner at the location of the lateral line connection; (j) removing said conduit liner cutting device form said rehabilitative conduit liner; (k) terminating the restriction of the flow of liquid through the conduit section.