金刚石与磨料磨具工程2011，Vol.31Issue(4)：5-9,5.DOI:10.3969/j.issn.1006-852X.2011.04.002
提高胎体式PDC钻头保径性能的研究
Improving radius retention performance of matrix-type PDC bit
摘要
Abstract
In order to remedy the problems of poor stability of radius retention and no targeted design for particular stratum during the manufacture of matrix-type PDC drilling bits, this research work designed 8 PDC bits by 4 kinds of radius retention methods . The radius retention performances of these drill bits were tested through field experiments. The mechanism of improvement of radius retention by hybrid grit sized diamonds was analyzed. The results showed that, PDC drilling bits manufactured with concentration 15 % coarse size diamond ( 20/30 ) and 10 % fine size diamond ( 50/60 ) as radius retention materials performed better wear resistance and free- cutting performances , which was superior to the case of using square PDC as radius retention material, especially in case of drilling in medium-hard and hard stratum , meanwhile the drilling efficiency was also increased.关键词
PDC钻头/钻探/金刚石/保径Key words
PDC bit / drilling/ diamond / radius retention分类
化学化工引用本文复制引用
张绍和,杨昆,杨期祥,王佳亮,施莉..提高胎体式PDC钻头保径性能的研究[J].金刚石与磨料磨具工程,2011,31(4):5-9,5.基金项目
湖南省自然科学基金资助,项目编号07JJ6089. （）
