基于Citespace的天然气水合物国际专利现状研究与趋势分析

Status Study and Trend Analysis of Natural Gas Hydrate International Patent Based on Citespace

探究各国天然气水合物关键技术专利布局及技术趋势,为各类创新主体的研发、创新活动及知识产权布局提供信息参考。文章以德温特创新索引专利数据库中收录的1970-2019年间天然气水合物相关专利为数据基础,利用科学计量工具Citespace绘制天然气水合物专利科学知识图谱,识别了主要专利权人、技术热点和前沿领域,并对其发展趋势进行了分析。结果表明:中国、日本、美国拥有的天然气水合物专利较多,中国专利在近2年快速增长;主要专利权人呈现小集中、大分散的特点,明显形成以中国和日本为主体的2大研究合作群体;开采方法与技术、计算机控制、环境保护既是热点领域,也是关注度较高的前沿技术领域,是实现天然气水合物商业化开发持续突破的方向。

The research project was conducted to probe into the patent portfolio and technological trend of the key technologies on natural gas hydrate(NGH)in different countries.Thus,it is designed to open up referential ideas for the R&D,innovation and intellectual property portfolio of various innovators.this paper uses the relevant patents on gas hydrate from 1970 to 2019 included in Derwent Innovations Index(DII)as data foundation and plots mapping knowledge domain of patents on gas hydrate with the Scientific measuring tool Citespace.Meanwhile,it identifies the major patentee,technical hot points and frontier fields and analyzes their development tendency.It's found that China,Japan and the United States possess relatively more patents than other countries while China's patents have increased rapidly in the recent two years;the major patentee is centralized in a small area but dispersed in large area,forming two research cooperation groups with China and Japan as their main part respectively;as the hot academic themes and frontier technologies,mining method and technology,computer control and environmental protection are also directions for realizing continuous breakthroughs in the commercial development of natural gas hydrate.