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Author: Admin | 2025-04-28
New hole.A mud called liqui-pol is mixed with water and pumped into the rod string, down the hole. This helps to bring up the sample to the surface by making the sand stick together. Occasionally, ‘super-foam’ (AKA ‘quik-foam’) is also used, to bring all the very fine cuttings to the surface, and to clean the hole. When the drill reaches hard rock, a collar is put down the hole around the rods which is normally PVC piping. Occasionally the collar may be made from metal casing. Collaring a hole is needed to stop the walls from caving in and bogging the rod string at the top of the hole.Collars may be up to 60 metres deep, depending on the ground, although if drilling through hard rock a collar may not be necessary. RC drilling equipment has come long way from this method of drilling angle holes in the mid 1960s. Reverse Circulation Drill Rod SuppliersFor the supply of RC drilling rods and equipment please visit our sponsors, Harlsan Industries at www.harlsan.com.au
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