石油钻采工艺2018，Vol.40Issue(1)：44-51,8.DOI:10.13639/j.odpt.2018.01.008
深部及复杂地层中PDC钻头综合改进方法
A comprehensive method to improve the performance of PDC bits in deep and complex formations
摘要
Abstract
The rocks in deep and complex formations are commonly characterized by high hardness, strong heterogeneity, poor drillability and high abrasiveness, so low rate of penetration (ROP), short service life and high cost have always been the main technical bottlenecks that restrict the efficient application of PDC bits in deep and complex formations. Obviously, it is of great practical signif-icance to study further the methods to improve PDC bits. The latest PDC bits and the related technologies at home and abroad were investigated, and the comprehensive PDC bit improvement method for deep and complex formations was put forward from four aspects, i.e., increasing ROP, prolonging service life, enhancing stability and optimizing steerability. Then, by virtue of this method, six PDC bits were designed to drill different types of hard formations (e.g. granite, competent sandstone and conglomerate) in Huabei and Northeast Oilfields. It is shown that these improved PDC bits are superior to conventional PDC bits and cone bits in terms of rock breaking effi-ciency and service life. It is indicated that this comprehensive improvement method has good applicability and use value. The research results provide the theoretical and practical guidance for the optimal design of PDC bits in deep and complicated formations.关键词
超深井/抗研磨地层/PDC钻头/结构改进/破岩效率Key words
ultra-deep well/abrasive resistance formation/PDC bit/structure improvement/rock fragmentation efficiency分类
能源科技引用本文复制引用
王滨,邹德永,李军,杨宏伟,黄涛..深部及复杂地层中PDC钻头综合改进方法[J].石油钻采工艺,2018,40(1):44-51,8.基金项目
国家科技重大专项"海上油气田关键工程技术"子课题"岩石研磨性评价及钻头磨损方程研究"(编号:2016ZX05033-004-006) （编号:2016ZX05033-004-006）
国家科技重大专项"高效复合冲击破岩技术研究及工具研制"(编号2016ZX05021003). （编号2016ZX05021003）
