Abstract: Downhole measurement control technology is a core technology in wellbore engineering technology, which includes three main parts - theories and methods related to downhole measurement control, technology for acquisition and transmission of control signals, and downhole control system. Alarge quantity of patented technologies have been currently created both inside and outside China. Based on adoption of international patent classification method and using Derent International Patent Database and the Patent Database of China International Intellectual Property Web for catalog analysis, it is found that the patent applications of downhole control technology worldwide are concentrated in 16 technological areas and the American and European regions, where the quantity of patents after 2000 account for more than 50 percent of the world’s total. China’s big-three oil companies have seen a small quantity of patents in the area of downhole measurement control. The analysis of growth curve indicates that the quantity of patents worldwide in downhole measurement control technologicalarea is still on the rise despite its rapidgrowthfora longperiod of time.It is necessary for Chinato enhancesupervisionandapplicationofpatent information from the main competitors and create its own independent intellectual properties by developing focus patent technologies. China should focus its research efforts on the technological areas with patent blanks and gradually expands the technological territories, starting the research and development work for frontier technological areas ahead of time to acquire the technological advantages.

Key words: oil and gas wells, downhole, measurement, control

摘要： 油气井井下测量控制技术是井筒工程技术的核心技术,其内容包括井下测量控制相关的理论和方法、控制信号采集与传输技术及井下控制系统三大部分。目前国内外已形成了数量众多的专利技术。采用国际专利分类法,通过德温特国际专利数据库和中国知识产权网专利数据库进行检索分析,发现世界井下控制技术领域专利申请主要集中在16个技术领域和美欧等国家和地区,2000年以后的专利数量占据了50%以上的比重。国内三大油公司在井下测量控制领域的专利数量还较少。通过生长曲线分析认为,世界井下测量控制技术领域的专利数量虽然经过了长时期的高速增长,但仍处于上升期。国内要加强主要竞争对手的研发动态和专利信息的监测利用,通过专利热点技术的研发,形成自主知识产权,强化存在较大专利空白技术领域的针对性研发,逐步扩大技术领地,超前部署前瞻技术领域的研发,抢占技术制高点。

关键词: 油气井, 井下, 测量, 控制, 专利