Experimental Study of Local Air-lift Inverse Circulation Rotary Drilling Technology With Large Diameter Hollow-through DTH Hammer

Yi Zhenhua; He Longfei; Hu Zhihai

doi:10.3969/j.issn.1007-2993.2013.01.002

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Yi Zhenhua, He Longfei, Hu Zhihai. Experimental Study of Local Air-lift Inverse Circulation Rotary Drilling Technology With Large Diameter Hollow-through DTH Hammer[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2013, 27(1): 5-8. doi: 10.3969/j.issn.1007-2993.2013.01.002

Citation:

Yi Zhenhua, He Longfei, Hu Zhihai. Experimental Study of Local Air-lift Inverse Circulation Rotary Drilling Technology With Large Diameter Hollow-through DTH Hammer[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2013, 27(1): 5-8. doi: 10.3969/j.issn.1007-2993.2013.01.002

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Experimental Study of Local Air-lift Inverse Circulation Rotary Drilling Technology With Large Diameter Hollow-through DTH Hammer

doi: 10.3969/j.issn.1007-2993.2013.01.002

1. China Shipbuilding Industry Institute of The Engineering Investingation & Design Co. Ltd, Shanghai 200063, China;
2. Shanghai Jintai Engineering Machinery Co. Ltd, Shanghai 201805, China

Received Date: 2012-08-23

Abstract

Abstract

Through actual drilling tests in the 50 meters wells, the SH25H hydraulic pneumatic impact drill was trial manufactured with the pneumatic DTH and local inverse circulation rotary drilling technology, and continuous footage was ensured by retractable drill pipe. The multi-techniques drilling technique is developed with high drilling efficiency and high quality of borehole.
- large diameter,
- local inverse circulation,
- hollow—through DTH hammer,
- hydraulic and pneumatic impact drill,
- retractable drill pipe