Systems and methods for pipeline rehabilitation
AssigneeFiberspar Corporation
InventorsPeter Quigley, Michael Feechan
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Abstract
The present disclosure is directed to methods and systems for pipeline rehabilitation. The methods and systems disclosed herein permit the rehabilitation of long lengths of previously installed pipe and minimize the need for creating multiple access points to the pipeline. The disclosed systems and methods are particularly suited for rehabilitating buried and undersea pipelines or pipelines installed in areas of restricted access.
Claims19
A method of rehabilitating a pipeline comprising a first pipe, the method comprising inserting a second pipe into said first pipe;
- and
- pushing and pulling a length of said second pipe through said first pipe.
The method of claim 2, further comprising flooding the first pipe with a fluid.
The method of claim 3, further comprising providing said second pipe with a buoyancy control layer.
The method of claim 4, wherein providing said second pipe with a buoyancy control layer includes extruding a layer on the exterior of said second pipe.
A method of rehabilitating a pipeline comprising a first pipe, the method comprising:
- inserting a second pipe having a buoyancy control layer into said first pipe, said buoyancy layer comprising a layer of material having a density selected to provide a desired buoyancy to said second pipe;
- and
- pushing and pulling a length of said second pipe through said first pipe.
Dependencies are inferred from the claim text.