Systems and methods for installation inspection in pipeline rehabilitation

Abstract

Embodiments of methods for pipeline rehabilitation include deploying a tubular liner along an inside of a pipeline, deflating the tubular liner to form a trough, and injecting grout into the pipeline by injecting grout into the trough. Other embodiments include deploying a tubular liner along an inside of a pipeline, inserting a first swab into the front end of the pipeline, the first swab havinga core hole, placing the tubular liner through the core hole, injecting grout into the pipeline between the tubular liner and the inside of the pipeline, and advancing a second swab through the tubular liner to distribute the grout between the tubular liner and the pipeline and to advance the first swab ahead of the second swab from the front end to the back end of the pipeline.

Description

technical field [0001] This application claims the benefit of US Provisional Patent Application Serial No. 60 / 823,085, entitled "Systems and Methods for Pipeline Rehabilitation," filed August 21, 2006, which is hereby incorporated by reference in its entirety for all purposes. Background technique [0002] Embodiments of the present invention relate generally to pipeline rehabilitation, and more particularly to improved injection and distribution of grout in pipeline lining installations. [0003] Over time, pipes often suffer from inner diameter corrosion and / or micro-cracks and / or leaks. Such pipes must often be replaced or repaired. Replacement often involves moving or destroying above-ground structures, such as driveways or sidewalks. Rehabilitation, on the other hand, may allow the use of existing pipe as the outer casing to create a new pipe inner diameter, which may eliminate the need to dig out much of the existing pipe and / or water main, and provide significant co...

AI Technical Summary

Problems solved by technology

However, the slurry injected between the tubular liner and the main pipe may have a tendency to slide over the tubular liner and flow under the tubular liner, thereby inhibiting the formation of ideal slurry in the uppermost region between the tubular liner and the pipe cover

Additionally, as the grout is distributed between the liner and the pipe, entrained or entrained air due to lack of sufficient back pressure can cause defects or gaps in the grout coverage

Images