Harlsan Deviation When Drilling Deep RC Holes 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...
Harlsan > Drilling Program Drilling Program – Grade Control Reverse Circulation is the most commonly used drilling method for grade control in open pit mining operations. Grade control is used to define the ore grades and ore blocks in the pit and also...
Harlsan > Drilling Program Drilling Program – Exploration Reverse Circulation is used in drilling programs for initial exploration & also for resource definition. There are two types of RC drilling. One is RC with hammer, used in medium and hard rock that...
Harlsan 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 underground (UG) mining....
Harlsan PRODUCT UPDATE – DRILL ROD ROBOT WELD, CLASS 1 PRESSURE VESSEL RATING Our 4½” drill rods are now certified at the Class 1 pressure vessel rating (AS1210 – 2010) for weld quality. HARLSAN PRESSURE VESSEL RATING The Harlsan Industries 4½” drill rod weld has been...
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