Trial of and Research on Down Hole Hammers Patterned in HC Annulus and Their Coring Methods
-
摘要: 在分析硬岩地层中采用潜孔锤钻进基础上,重点从多头潜孔锤组合形式,对比了环状取心或全断面破碎孔底过程,并对大直径硬岩取心方法和HC型环状潜孔锤取心实钻试验作了简要介绍.
-
-
计量
- 文章访问数: 136
- PDF下载数: 4
- 施引文献: 0