Inline Robot for Inspecting and Repairing Leaks in Pipeline and Preventing Methane Emissions

With a vast network of over 400 thousand miles of transmission pipeline and over one million miles of aging distribution pipeline in the U.S., it is a huge endeavor to continuously monitor pipeline integrity, detect leaks, and repair leaks.Conventional methods to repair leaks are labor intensive and could take many hours during which there are chances for leak propagation, excessive release of methane (greenhouse gas) into the surroundings, and potential loss of property and life due to ensuing dangerous conditions.Pipeline operators are subject to significant revenue losses and increased expenses from these leaks and also from intentional attempts to compromise pipe integrity such as theft.A Leak Detection and Repair Robot will enable pipeline operators to quickly detect and repair leaks from inside their pipelines without having to shut off gas to consumers and without causing public disruption.The robot will detect leaks better than current leak detection solutions due to the proximity of the sensor to the leak; thus, arming pipeline operators with more leak data for improved risk-based decision making.A robot that can also perform instant repairs minimizes the amount of methane released into the environment.In Phase I of this project, leak detection sensors were tested in both high- and low-pressure test environments and the ability to perform leak detection, classification, and characterization from inside the pipe was demonstrated.Repair methods were designed, prototyped, and successfully demonstrated in leaking pipe.The Leak Detection and Repair Robot was conceptually designed, and the feasibility of deploying the robot was assessed.Test results and conceptual designs were shared with several pipeline operator companies that confirmed the feasibility and commercial viability of the robotic system.In Phase II, the leak detection sensing system will be completely designed and optimized.The reliability of the repair methods will be further improved, tested, and optimized.The prototype Leak Detection and Repair Robot will be designed, fabricated, and tested to prove out its functionality and performance.The robotic system will help pipeline operators meet regulations for methane emissions, lower the chances of disruption and harm to the public, and lower the cost of detecting and repairing leaks.Reducing methane emissions positively impacts climate change and in turn the public.