reduced drilling fluids needed by 50%, eliminated the need for a costly, time consuming cementing/grouting and improved the average bit life used. The new solution delivered significant productivity improvements to the operation at the Resolution Copper site in Arizona, USA.
After a successful trial on another hole at the Resolution Copper Mine in Arizona, AMC was assigned a dedicated hole to trial of the AMC Borehole Optimisation System™ (AMC BOS™)
to improve efficiencies across the full course of drilling.
The crew had been facing a variety of issues in the region with sections of the whitetail conglomerate formation breaking free and causing constant reaming and excessive wear on bits. Drilling through the other troubling formation; cretaceous volcanic sediment, resulted in excessive clay leaching and swelling of the ground, causing the rods to stick and pinch. These unpredictable and unstable formations contributed to excessive drill bit wear from the repeated reaming and rod tripping. The increase in rod tripping increased exposure to hazards for the crew on site.
- Eliminated cost of cementing/grouting, vacuum truck and displacement of contaminated drilling fluids
- Improved rig productivity by 4 days, contributing to considerable cost savings
- 50% reduction in drilling fluids used on-site, allowing drillers to focus on drilling and not mixing mud
- Improved site safety – less exposure to injury due to unnecessary rod trips for prematurely worn drill bits
- Significant torque reduction – up to 27%
- Over 50% improvement in bit life, only 4 bits used from the cut-out wedge at 3,428ft to the bottom of the 6,770ft borehole.