石油钻采工艺2023，Vol.45Issue(4)：455-462,8.DOI:10.13639/j.odpt.202303002
川东北沙溪庙组硬质砂岩地层斧形PDC齿设计及破岩性能
Design and rock-breaking performance of axe-shaped PDC cutter for hard sandstone of Shaximiao Formation,northeastern Sichuan Basin
摘要
Abstract
Axe-shaped PDC cutter is well performed in rock breaking owing to its unique structure,but its rock-breaking performance and optimal working angle remain unclear.An evaluation method of total specific energy for rock breaking by cutting combining with pressing was established.By using the rock-breaking simulation model,the working angle optimization of axe-shaped PDC cutter was investigated,and a simulation was conducted on the axe-shaped PDC cutter with optimized working angle.The results show that the composite rock-breaking specific energy of the axe-shaped PDC cutter changes in an"N"pattern as the working angle increases.The axe-shaped PDC cutter with the working angle of 130° is excellently performed in hard sandstone,with the cutting force,cutting rock-breaking specific energy,pressing rock-breaking specific energy,and composite rock-breaking specific energy of 35%,20%,5.9%and 10.5%lower respectively than that of conventional PDC cutter.Laboratory experiment shows that the cutting rock-breaking specific energy of the axe-shaped PDC cutter reduces by 35.2%and shows a greater penetration.The research provides a theoretical foundation for customization of PDC cutter for hard sandstone of Shaximiao Formation in northeastern Sichuan Basin.关键词
川东北沙溪庙组/硬质砂岩/破岩工具/斧形PDC齿/齿刃角/破岩比能Key words
Shaximiao Formation in northeastern Sichuan/hard sandstone/rock-breaking tool/axe-shaped PDC cutter/working angle/rock-breaking specific energy分类
能源科技引用本文复制引用
荣准,张航,陶垒,马亚超,张琦,颜爽,曾皓..川东北沙溪庙组硬质砂岩地层斧形PDC齿设计及破岩性能[J].石油钻采工艺,2023,45(4):455-462,8.基金项目
国家自然科学基金"热力复合作用下PDC钻头动态磨损机理与引磨力平衡布齿理论研究"(编号:51904263) （编号:51904263）
企事业单位委托科技项目"川东北气矿 2022年五宝场区块沙溪庙组硬塑性岩石破碎机理与高效个性化钻头方案设计研究"(编号:XNSJS2022-54). （编号:XNSJS2022-54）
