HC型环状组合式潜孔锤及取心方法试验研究

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。

Abstract:

The broken processes of borehole bottom rocks under annulus coring or full face drilling, while various arranging patterns of multi-pieces down hole hammers are used, are compared based on the analyses of drilling in hard rocks by down hole hammers. The larger diameter coring method and the case study of coring by down hole hammers patterned in HC annulus are also introduced.