New Progress and Development Trends of PDC Bits in China and Abroad
PDC bits have developed rapidly in recent years.The new progress of PDC bits used in oil and gas wells in China and abroad was reviewed,and CNPC's efforts in the research and application of new bits were intro-duced.Furthermore,the situation and challenges for PDC bit research and development in China were elaborated,and the new trends in the development of PDC bits were forecasted.The results show that under the background of oil and gas resource exploration advancing towards a depth of tens of thousands of meters,there are still serious challenges such as low rock-breaking efficiency of bits due to poor formation drillability,early damage of bits caused its shaking by gravel layers and long drilling cycles of large-sized wellbores.Technology and material inno-vation type efficient bits,hybrid bits and adaptive bits can significantly improve drilling efficiency and bit life.The abundant downhole data provided by smart bits can enhance understanding of deep rock-breaking mechanisms and rock properties,and is of great significance for further optimizing bit structures and identifying potential oil and gas reservoirs.The results of hybrid,adaptive and intelligent bits should be actively used for reference and transplan-ted,so as to successfully develop high-end durable bits suitable for deep oil and gas exploration or deep geological scientific drilling as soon as possible.The research findings provide reference for the localization and serialization of high-end PDC bits as well as related researchers.
NETL
NSTL
万方数据
维普
