As an unconventional natural gas resource, shale gas was first extracted in America. The evaluation method and exploitation technology for shale gas have been developed maturely and push the shale gas industry grows rapidly in North America. In this paper, the exploitation technology patents on shale gas from Derwent database of Thomson Reuters by 2013 were analyzed based on the quantity and key words from countries and institutions, as well as the focus themes. It reveals the key mining technology and development trends of shale gas, and then proposes countermeasures and suggestions for the shale gas development in China.

At present, China has established the world’s largest high-speed railway network. This article interprets the innovation status quo of China’s high-speed railway industry in view of patent statistics. The global innovation of high-speed railway technology shows stable pace. Main countries or regions are active on abroad patent filing, but the filing concentration degree is low. Comparatively, China’s high speed railway technology develops quickly with the emerging of superior companies and balanced development in each field, but due to the lack of patent deployment, Chinese enterprises is facing complicated and fierce competitions.