Testing of the Air Reverse Circulation Drilling Process in Geo-physical Blast hole Drilling

Abstract:

This paper describes the theory, features and testing results of the air reverse circulation drilling process used in geo-physical blast hole drilling, It is concluded through the testing that the process provides high penetration rate, deeper depth and explosive installation without tripping drilling tools; and its application is of good prospect.

Key words:air reverse circulation; geo-physical blast hole; dual wall tube