Abstract: A method for lining a passageway which comprises providing a plurality of tube sections connected end to end, pulling a first tube section through the passageway in a collapsed condition and thereafter everting a second tube section into the interior of said collapsed first tube section to cause it to expand outwardly toward the interior walls of said passageway.

Abstract: A method and apparatus for forming sealed and reinforced holes through the end of a flexible, resin-impregnable, tubular pipe liner for securing a cable thereto and for sealing the end of the liner. The liner is installed into an existing conduit either by pulling a cable secured to holes at the front end of the liner or by eversion of the liner while securing a hold-back cable to holes at the trailing end of the everting liner. Holes are cut through the liner, and resin is impregnated into the region about each hole and hardened to form an integral grommet or reinforcement. A mold for impregnating the region about the hole includes a lower mold body with a projecting spigot and a groove thereabout. An upper mold body has a central opening with a groove thereabout, the upper mold body fitting over the spigot.

Abstract: A method and apparatus for forming sealed and reinforced holes through the end of a flexible, resin-impregnable, tubular pipe liner for securing a cable thereto and for sealing the end of the liner. The liner is installed into an existing conduit either by pulling a cable secured to holes at the front end of the liner or by eversion of the liner while securing a hold-back cable to holes at the trailing end of the everting liner. Holes are cut through the liner, and resin is impregnated into the region about each hole and hardened to form an integral grommet or reinforcement. A mold for impregnating the region about the hole includes a lower mold body with a projecting spigot and a groove thereabout. An upper mold body has a central opening with a groove thereabout, the upper mold body fitting over the spigot.

Abstract: A leaking joint in a pipeline is sealed by locating a separable mould around the joint to form in conjunction with the pipeline a mould chamber enclosing the joint. Sealant is injected into the mould chamber and the volume of the mould chamber is reduced by deforming a flexible wall of the chamber to pressurize the sealant to a pressure above that inside the pipeline until the sealant has solidified around the joint.