Research and application of downhole blowout prevention system while drilling: A review

Abstract With the advantages of blowout prevention technology while drilling, such as “early discovery, early control, rapid killing of overflow and stifling overflow in budding state”, it has gradually become the hot research direction of safe drilling well control in sensitive formation. This paper introduces the definition and function of blowout prevention system while drilling. The development history of sealing module, overflow monitoring and rapid early warning module, downhole communication module and post-sealing well killing module of blowout prevention system while drilling is investigated respectively, and the technical development trend of each module is analyzed and summarized. The application research of blowout prevention technology in drill pipe and outer ring air blowout technology of drill pipe while drilling is carried out, and the feasibility of industrial application of air blowout prevention technology in outer ring of drill pipe is analyzed. It is predicted that the blowout prevention system while drilling will advance towards intelligence, automation and high efficiency in the future.