Global Geology 2011, 14(4) 259-264 DOI:     ISSN: 1673-9736 CN: 22-1371/P

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Keywords
Hollow-through DTH hammer
reverse circulation
reverse circulation bit
simulation
Authors
BO Kun
YIN Kun and PENG Jianming
PubMed
Article by BO Kun
Article by YIN Kun and PENG Jianming

Reverse Circulation DTH Hammer Drilling Technique

BO Kun, YIN Kun and PENG Jianming

College of Construction Engineering,Jilin University,Changchun 130026,China

Abstract

The technical characteristics and operational principal of the reverse circulation DTH hammer drilling technology is integrated introduced in this paper. Using simulation technology to assist the drilling tool design, the optimum designed DTH hammer gets stable performance,and the bit has reverse circulation ability,and further more,it has already developed serial products. The reverse circulation DTH hammer drilling technique has been fully applied in field such as the geological core exploration in complex strata,water well drilling,and large diameter rock embedding piles drilling in hard rock,and obviously,it is achieved favorable economic and social benefits.

Keywords Hollow-through DTH hammer   reverse circulation   reverse circulation bit   simulation  
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