Lining of pipelines or passageways using a push rod adhered to rod and liner
AssigneeInsituform B.V.
InventorsEric Wood, deceased, by Miranda Jane Bull, legal representative, by William A. Martin, legal representative
Life of this patent
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Abstract
The lining of lateral pipelines is effected from the service end by inserting a resin impregnated lining tube into the lateral using a push rod. The leading end of the push rod is attached to the liner by a relaeasble device so that once the liner is in place, and the rod pulled back, the liner detaches and remains in the lateral. The liner is held in folded state by straps which are broken as the rod is pulled back in that a rope attached to the leading end of the rod is trapped under the straps and breaks them one by one as the rod is retracted.
Claims21
A method of lining a pipeline or passageway by means of a tubular liner, comprising:
- a) attaching one end (the leading end) of the tubular liner to one end (the leading end) of a push rod means by a a length of an adhesive retaining strip adhered to the leading end of the push rod means and to the leading end of the liner;
- b) inserting the liner in the pipeline or passageway by pushing the rod means leading end first into and along the pipeline or passageway from a near end to a distal end of the pipeline or passageway so that the rod means pulls the liner into the passageway,
- c) pulling the rod means in an opposite direction to release said adhesive retaining strip whereby the rod means is pulled from the pipeline or passageway and the liner remains in position, and
- d) inflating the liner into the pipeline or passageway to line same.
Apparatus for inserting a tubular liner having a leading end and a trailing end in a pipeline or passageway comprising:
- a) rod means having a leading end and a trailing end
- b) a length of adhesive retaining strip adhered to the leading end of the rod means and to the leading end of this liner, said rod and strip adapted to pull the liner into the pipeline or passageway when the rod means is pushed into the pipeline or passageway and to release the liner, to leave it in the pipeline or passageway when the rod means is pulled from the pipeline or passageway.
Apparatus for use in lining a pipeline or passageway comprising:
- a) a length of tubular liner having a leading end and a trailing end, said liner folded lengthwise and held folded by strap means round about the liner at spaced intervals along the length thereof;
- b) rod means having a leading end and a trailing end, said liner and rod means lying side by side,
- c) releasable attachment means connecting the leading end of the rod means with the leading end of the liner, said releasable attachment means adapted to pull the liner into the pipeline or passageway when the rod means is pushed into the pipeline or passageway and to release the liner, to leave it in the pipeline or passageway when the rod means is pulled from the pipeline or passageway;
- and
- d) a fracturing rope extending along the liner and positioned under the strap means, the rope connected to the rod means at the leading end thereof.
Dependencies are inferred from the claim text.