摘要
为了研究PDC-牙轮混合钻头的破岩过程及其钻进软硬交错地层时的工作特性,根据Drucker-Prager准则构建软硬交错岩石模型,并对混合钻头和传统PDC钻头进行钻进仿真对比分析。结果表明:钻进过程中距井眼轴心约2/3井眼半径部位的岩石所受应力较大;在软硬交错地层中,混合钻头比PDC钻头的机械钻速高28.8%、钻速波动值低27.0%、径向载荷峰值低27.6%。混合钻头利用PDC切削齿与牙轮切削齿进行协同破岩,相比PDC钻头能够更加快速、稳定地钻进软硬交错地层。
In order to study the rock-breaking process and working characteristics of PDC-cone hybrid bit drilling into soft and hard interbedded strata,a model of soft-hard staggered rocks was constructed based on Drucker-Prager criterion,and comparative analyses of drilling simulation with hybrid bit and with PDC bit were carried out.The results show that the rock about 2/3 wellbore radius away from the borehole axis is subjected to greater stress during the drilling process.When drilling into soft and hard interbedded strata,the hybrid bit has a 28.8%higher rate of penetration(ROP),a 27.0%lower ROP fluctuation,and a 27.6%lower peak radial load than PDC bit.The hybrid bit uses PDC cutters and cone cutters for collaborative rock breaking,enabling faster and more stable drilling of soft and hard interbedded formations than PDC bit.
作者
邓思洪
但斌斌
容芷君
陈刚
樊孝兵
佘运玖
Deng Sihong;Dan Binbin;Rong Zhijun;Chen Gang;Fan Xiaobing;She Yunjiu(Key Laboratory of Metallurgical Equipment and Control of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;Wuhan Branch of Baosteel Central Research Institute (R&D Center of Wuhan Iron and Steel Co., Ltd.), Wuhan 430080, China;Kingdream Public Limited Company of Sinopec Oil Field Equipment Corporation, Wuhan 430223, China)
出处
《武汉科技大学学报》
CAS
北大核心
2022年第1期46-52,共7页
Journal of Wuhan University of Science and Technology
基金
湖北省技术创新专项重大项目(2019AAA013).
