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AssigneeInsituform (Netherlands) B.V.
InventorsEric Wood, deceased, Miranda J. Bull, administrator
Estimating the term…
An assembly which can be inserted into a pipeline or passageway on which a curable resin impregnated flexible lining is placed about an inflatable bladder is provided. The bladder is mounted to one end of a core pipe and folded over on itself. Medium flowing in the pipeliner passageway can pass through the core pipe during a lining operation. The core pipe is of sufficiently rigid nature to withstand inflation pressure to move the lining tube into the pipeliner passageway surface by inflation of the bladder, but yet is sufficiently flexible and bendable so as to bend enabling it follow curbs and falls in the pipeliner passageway into which it is inserted. Temporary holding means restrain the liner during insertion.
A method of lining a section of a pipeline or passageway by a "cured in place" system comprising providing a length of lining tube which is impregnated with a curable synthetic resin and carrying that lining tube on an assembly including an annular inflatable bladder to the inside of which is provided a core tube, transporting the assembly to the section of pipeline or passageway to be lined, inflating the annular inflatable bladder to press the length of lining tube to said section of the pipeline or passageway and effecting the cure of same, the core tube being a flexible unitary continuous hollow tube of sufficient rigidity to support the air pressure and sufficiently bendable to enable it to bend round curves and corners around which the assembly must pass in travelling along the pipeline or passageway to said section with the bladder deflated during the said transportation, and the bladder and lining tube being folded to a collapsed condition and held in such condition by temporary holding means which release their hold upon the bladder when inflated and allows the liquid flowing medium, normally accommodated by the pipeline, to continue to flow through the core while the assembly is being inserted and curing of the length of the lining tube is taking place.
An assembly for introduction into a pipeline or passageway and for the application to a section of said pipeline or passageway of a "cured in place" lining tube, said assembly comprising a flexible unitary hollow core tube having at least one aperture and an annular inflatable bladder surrounding said core and aperture, said core tube being of sufficient rigidity to support the bladder when inflated without collapse of the core tube and also being sufficiently bendable to enable it to bend round curves in the pipeline or passageway into which it is inserted, an annular inflatable bladder surrounding said core, wherein the bladder is defined by a length of inflatable tubular material turned in upon itself to form an inner side and an outer side, and the adjacent free ends of the inner and outer sides are connected at one end to the core tube on opposite sides of the aperture enabling the insertion of air under pressure in order to inflate the bladder.
A method of providing an assembly whereby a section of a pipeline or passageway may be lined by a "cured in place" lining system wherein a length of lining tube impregnated with synthetic resin is arranged end to end with an annular inflation bladder tube, which in turn is laid end to end with a core pipe to which the inflation tube is attached, and wherein the inflation tube is everted into the lining tube by pushing the core tube into the centre of the inflation tube so that in the final assembly the inflation tube surrounds the core tube and the lining tube surrounds the inflation tube, followed by deflation of the inflation tube to form the assembly for insertion in the pipeline or passageway.
A method for lining a section of a pipeline or passageway with a cured in place liner segment, comprising:
A device for lining a section of a pipeline or passageway with a cured in place liner segment, comprising:
Dependencies are inferred from the claim text.