Harlsan > Article Library Look for quality and experience when purchasing a new RC drill string There is no substitute for quality and experience in RC drilling consumables. Choosing a supplier with extensive industry knowledge and a proven track record will save...
Harlsan > Article Library How underground RC drilling turned around a Gold Mine Using underground reverse circulation (RC) drilling at underground operations is a relatively new technique in the mining industry In Australia, diamond drilling is synonymous with...
Harlsan > Articles by: harlsan How to us a spiral stabilizer sub. The drilling industry is always looking for improvements in tools and techniques for quality, efficiency, and cost improvements. Problems with hole deviation arise from time to time but can be...
One of the common problems associated with Reverse Circulation Inner Tubes was the premature wear and grooving caused by the traditional O-ring sealing system. Inner Tubes with O-rings were also prone to bouncing and spinning that further reduced the overall life of...
Back in 2011, Harley Hollier at Harlsan was approached by a customer regarding a problem they had drilling 360m deep Reverse Circulation holes. Some of the holes had deviated more than 5 degrees off the intended azimuth when measured at the bottom of the hole. As the...
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