SMART DRILLING TECHNOLOGIES AND THEIR DEVELOPMENT
Zhang Shaohuai · Tianranqi gongye · 2008
While drilling through complex geological formations,a large number of issues will have to be encountered like anisotropy,uncertainty,non-structural and non-numerical practicality and the so-called smart drilling technology is urgent needed to solve those problems.Combining theory with practice,this paper discusses the history,process and technical value of the first and the second generation of the smart drilling technology,and concludes that the second generation will be the main trend of the near future drilling technology with better features of integrating the state-of-the-art techniques and the advanced RD results from drilling and logging,and the essential part of this technology is to research and design on the electric drill string.On the other hand,this paper investigates into basic theory and technical features of the smart drilling technology and analyzes how the smart drilling technology develops in the future.Focusing on a kind of smart drilling technology with an electric drillstring based on a reliable electrical connector integral with a premium drill pipe thread,which is still under research and development,it introduces the main interests and technical difficulties and points out this special smart drilling technology will be expected to solve many bottlenecking issues unsettled by the first generation smart drilling technology.