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Global Geology 2011, 14(4) 259-264 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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Reverse Circulation DTH Hammer Drilling Technique |
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BO Kun, YIN Kun and PENG Jianming |
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College of Construction Engineering，Jilin University，Changchun 130026，China |
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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． |
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Keywords：
Hollow-through DTH hammer
reverse circulation
reverse circulation bit
simulation
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Received Revised Online: |
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