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Title: Robotic Internal Pipe Repair System
Author: James Carter, Robert Torbin
Source: American Gas Association 2004
Year Published: 2004
Abstract: The gas industry spends over 150 million per year repairing gas mains. Gas leakage results in unsafe operating conditions for the working crew and the general public. An internal repair technique that could minimize and/or eliminate some of the problems and costs associated with external repairs of pipelines would be of significant benefit to the gas industry. A repair technology is needed that can be inserted into the pipe through a small keyhole excavation. The technology should also be adaptable to several possible delivery platforms including autonomous robots, snakes and crawlers. The internal pipe repair system is designed to address the many technical issues associated with pipeline problems including sealing leaks in pipe joints from the inside of the pipe and/or reinforcing the pipe wall from either mechanical dents or corrosion induced pitting. The concept consists of a self-expanding, narrow band of composite material that contains (and ultimately confines) a bead of sealant.

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