Method and apparatus for repair-lining of short sections of pipe
AssigneeInsituform Licensees B.V.
InventorsF. Thomas Driver, Jeff P. Wells
Life of this patent
Estimating the term…
Abstract
To facilitate the repair of short sections of pipe by providing a lining in situ, a repair carrier containing the repair lining is moved into position adjacent the pipe length to be lined, the lining is forced out of the carrier into position in the pipe where it is fixed in position and the carrier is then removed from the pipe leaving the lining in place. A flexible tube forming a part of the carrier is used to initially position the lining in the carrier and then to force the lining out from the carrier and urge it against the interior of the pipe, preferably by eversion.
Claims11
The method of effecting repair of a length of pipe remote at both ends from an access opening to said pipe by applying a lining to said length which comprises putting said lining inside a carrier, locating said carrier within said pipe with one end of said carrier adjacent one end of said length, extending said lining from said carrier and causing it to be located along the inside of said pipe length, fixing said lining in position within said pipe length and removing said carrier from said pipe, including the steps of initially locating a flexible tube within said carrier, securing the leading end of said tube to said carrier adjacent said one end thereof, positioning said lining remote from said carrier, extending said tube from said carrier and engaging said lining with said extended tube, then moving said tube back into said carrier, thereby pulling said lining into said carrier, and thereafter extending said tube from said carrier to thereby cause said lining to extend from the carrier with said tube inside said lining.
The method of effecting repair of a length of pipe remote at both ends from an access opening to said pipe by applying a lining to said length which comprises putting said lining inside a carrier, locating said carrier within said pipe with one end of said carrier adjacent one end of said length, extending said lining from said carrier and causing it to be located along the inside of said pipe length, fixing said lining in position within said pipe length and removing said carrier from said pipe, including the steps of initially locating a flexible tube within said carrier, securing the leading end of said tube to said carrier adjacent one end thereof, positioning said lining within said tube, securing one end of said lining to said one end of said carrier by a length of material having a region weakened so as to be frangible, and removing said carrier from said pipe by pulling it away from said positioned lining with a force sufficient to break said weakened region, thus enabling said carrier to be removed from said pipe while leaving said lining in position within said pipe.
A carrier for a length of pipe lining to be applied to the interior of a pipe comprising a substantially cylindrical hollow body with one end open and the other end closed, said body providing a substantially closed fluid communication path between said ends, a flexible tube within said carrier, one end of said tube being secured to the open end of said carrier and having a diameter substantially equal to that of the open end, the other end of said tube being located within said carrier, and a fluid conduit passing through said closed end of said carrier, said conduit being secured to the exterior of said tube adjacent said other end thereof to thereby close said other end of the tube and provide an enclosed space within the hollow body, said conduit in fluid communication with said enclosed space, said conduit being mounted on said closed carrier end so as to be axially movable therethrough as said tube moves out from said carrier.
A carrier for a length of pipe lining to be applied to the interior of a pipe comprising first and second end members comprising substantially cylindrical hollow bodies with ends exposed at the ends of said carrier, said end members being separated and connected by a tubular element providing a substantially closed fluid communication path between the hollow interiors of said bodies, a flexible tube within said carrier, one end of said tube being secured to the second of said end members and having a diameter substantially equal to that of said second end member, the other end of the said tube being located within said carrier remote from said second end member, the exposed end of said second end member being open, the exposed end of said first end member being closed, and fluid conduit passing through said closed end, said fluid conduit being secured to the exterior of said tube adjacent to said other end thereof to thereby close said other end of the tube and provide an enclosed space within the hollow interiors of said bodies, said conduit in fluid communication with said enclosed space, said tube being adapted to be engaged with and manipulate the lining for said pipe.
Dependencies are inferred from the claim text.