AMC BORE HOLE STABILISER successfully negated the need for traditional PVC casing, delivering multiple drilling efficiencies, achieving crucial hole stability, and resulting in a 34% reduction in total annual drilling costs in the Goldfields region of Western Australia.
The underground drill site approximately 20km west of Kalgoorlie, Western Australia, was notorious for shear zones and reactive clays, causing stuck rods while drilling. Geology at the deposit includes a sheared contact zone between the porphyritic ‘cat rock’ and volcaniclastic rocks of black flag beds.
The operator was frequently experiencing stuck rods - causing issues almost every shift. Up to 31 rods had been lost in one shift, with an approximate total value of $31,000. The drillers were practicing the traditional method of installing PVC casing to maintain hole stability, but due to the challenging nature of the hole, this method was proving costly and time-consuming. Productivity losses were experienced, rigs stood idle while drill crews manually inserted casing and time was lost through multiple re-drills.
- Total drilling costs reduced by 34%
- Crucial hole stability was achieved – PVC casing no longer required
- Increased productivity, more metres drilled each shift
- Reduced fuel and transport costs
- Reduced drilling consumables – PVC consumables as well as lost drill rods and rod strings
- Reduced driller and service crew time
- Improved hole gauge
- Reduced HSE risks – manual handling and labour to install casing