- 责任者：Tian Min (No.4 Geological Exploration Institute ; Henan Geology and Mineral Bureau ; Zhengzhou 450001 ; China) ; Zhao Zhiqiang
- 刊名：Exploration Engineering
- 出版年：2013
- 卷期：40(11)
- 关键词：反循环钻进 ; reverse circulation drilling ; 潜孔锤钻进 ; down-hole hammer drilling
- 页码：p.1-4
- 图表：6 illus., 1 table, 10 refs.
- 分类号：2000
- issnNo：ISSN1672-7428
- isbnNo：CN11-5063/TD
The technology of reverse circulation continuous coring drilling with hollow-through DTH hammer has shown lots of peculiarities, such as the high drilling efficiency, good quality of borehole and low drilling cost, especially the unique a- daptability while drilling in complex strata. In this paper, series of field tests have been conducted on the basis of optimized configuration of reverse circulation drill bits and drilling tools according to Tiancheng gold mine drilling project in Xiaoqin- ling area. The tests results have shown that the modified drilling system with hollow-through DTH hammer could be of high adaptability to drilling in complex conditions, which could effectively solve the problems of drilling in this ore district. What＇s more, the results contribute to the further innovative research on the mechanism theory of hollow-through DTH hammer and the structural design of reverse circulation drilling bits. In addition, it could provide technical supports for the reasonable optimization of hollow-through DTH hammer and drilling tools configuration to achieve the high efficiency, low cost, short period and superior drilling effect in complex geological conditions.