Harlsan Article Library
Keep up with Harlsan news, product releases and information on how to get the most out of your gear.
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What is RC Drilling?
What Is Reverse Circulation Drilling? An Introduction To The Benefits Of RC Drilling Things we’re covering in this article: A Short History of RC Drilling How Does RC Drilling Work? How Is RC Drilling Applied? The Benefits & Advantages of RC Drilling The...
What Is Air Core Drilling?
What Is Air Core Drilling? An introduction to the benefits of Air Core drilling What is air core drilling? Air core drilling uses three-bladed steel or tungsten drill bits to bore holes into unconsolidated ground and is used when safe and clean removal of sample...
Reverse Circulation Drilling Programs
Reverse Circulation Drilling Programs How reverse circulation drilling is effectively used in exploration drilling programs. Reverse Circulation is used in drilling programs for initial exploration and also for resource definition. There are two types of RC drilling....
Harlsan Deflector Box Wear Bend Design Breakthrough Boosts Safety and Durability, Reduces Maintenance and TCO
Harlsan Deflector Box Wear Bend Design Breakthrough Boosts Safety and Durability, Reduces Maintenance and Total Cost per Metre Don’t have time to read the full article? Here’s a summary of benefits of the new Harlsan Wear Bend: Maintenance intervals up to 5 x...
Premature RC Inner Tube Wear
Problem – Premature RC Inner Tube Wear 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...
Deviation When Drilling Deep RC Holes
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 when...
Drilling Program – Grade Control
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 provide knowledge for mine planning and...
Drilling Program – Exploration
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 can reach depths up to 800m. Rods...
How Underground RC Drilling Turned Around a Gold Mine
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. This...
Harlsan 4½” Tool Joint Weld Pressure Vessel Rating (AS1210 – 2010 Class 1)
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...
Reverse Circulation Drill Pipe Weights
Reverse Circulation Drill Pipe Size & Weights Need to work out the weight of your drill rod or drill string? Use our tools. When it comes to dealing with Harlsan, and our products, we always strive to make it as easy as possible for you. In recent months we’ve...
Why You Should Use 316 Stainless Steel Rods and Steer Clear of 304
304 vs 316 Stainless Steel The Difference Between 316 Stainless Steel Rods and 304. Did you know that if your RC drill rig is currently equipped with 304 stainless steel drill rods there’s a good chance your client’s hole survey is going to produce false data and that...