关键词: 油气井, 井下, 测量, 控制, 专利

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