Recently, the Science and Technology Management Department of CNPC held a scientific and technological achievement appraisal meeting to appraise the "CG-STEER Rotary Steerable Drilling System" jointly completed by Chuanqing Drilling Engineering Company Limited (CCDC), China Aerospace Science and Industry Corporation Limited (CASIC), and China University of Petroleum (East China). According to the appraisal committee, the CG-STEER rotary steerable drilling system has reached the international advanced level with remarkable social and economic benefits and broad application prospects.
Rotary steerable drilling system is a new cutting-edge automatic drilling technology, which represents the highest level of drilling technology development in the world. It has become a necessary technology for directional wells, horizontal wells and extended reach wells in complex formations. Over the years, China's independently developed rotary steerable drilling system has made important progress, but there is still a big gap with foreign advanced technologies in terms of build-up rate, downhole work safety and reliability, and the comprehensive performance is insufficient, making China's rotary steerable drilling system long-term dependence on imports.
Since 2010, CCDC, CASIC and China University of Petroleum (East China) have jointly carried out the research and development of "CG-STEER rotary steerable drilling system", and jointly undertaken the 13th five-year-plan major national science and technology project "Development of Rotary Steerable Drilling System" (2016ZX05022002). In view of one of the core research tasks in the project, "improving the build-up rate technology", Professor Guan Zhichuan's group proposed a "balanced trend" prediction theory and control method of build-up rate based on the coupling effect of drill string, drill bit and formation, and made a key innovation of the new generation of CG-STEER rotary steerable drilling system in the field of build-up rate prediction and control. The build-up rate increased from less than 6.0°/30m to more than 10°/30m, which is equivalent to the advanced level of similar technology in foreign countries. The research results provide strong theoretical and technical support for the improvement of the reliability and stability of the new generation of CG-STEER rotary steerable drilling system. Since 2019, the new generation of CG-STEER rotary steerable drilling system has completed drilling operations in four highly difficult shale gas horizontal wells, with a cumulative footage of 7758m, setting multiple records of domestic rotary steerable system such as the maximum build-up rate of 11.2°/30m, the longest life of single run of 297h, and the footage of 1090m, breaking the technical blockade of western developed countries.
Prof. Guan Zhichuan’ group have carried out a long-term research on the effective rock breaking method and speed-up technology in deep complex formation, the theory and technology of directional drilling, the risk assessment and control of drilling engineering, the wellbore integrity assessment, et al. They have achieved a series of original results. They have obtained more than 60 invention patents of China, the United States, Canada, Russia and the European, published more than 300 high-level papers, and received more than 10 national and provincial scientific research and teaching achievement awards, and formed important influences on oil and gas drilling engineering.
The research and development of CG-STEER rotary steerable drilling system is inseparable from the efforts of Prof. Guan Zhichuan's group and the strong support of the university. In recent years, China University of Petroleum (East China) has been complying with the development requirements of China's petroleum industry, continuously carrying out personnel training, discipline construction, resource exploration, industrial development and other tasks, and has made many contributions to the development of various aspects of the petroleum industry. In the future, the university will continue to strive towards the goal of "high-level research university with the world-class petroleum discipline and multi-disciplinary coordinated development"!