Progress in Underground Gas (Hydrogen) Well Inspection Technology in China

Underground gas storage wells are widely used for large-scale gas storage and high-pressure gas storage at automotive refueling stations. Based on a review of relevant literature on gas storage wells, and incorporating the latest scientific research findings and inspection engineering practices, the current status of major inspection and testing technologies, as well as regulatory standards for gas storage wells are summarized. The technological development of hydrogen storage wells/hydrogen storage facilities, the technical challenges in inspecting and testing for hydrogen storage wells, and feasible testing technologies, and proposes recommendations regarding inspection and testing technologies for hydrogen storage wells are analyzed and discussed also.