With less than 1% hole deviation, water-well drill nails target on first pass
By Jason Lamb
Boart Longyear has multiyear contracts with the largest iron ore mining operations in the Pilbara region of northern Western Australia (WA) to undertake water-well drilling at active and future mine sites. The company uses a fleet of dual-tube flooded reverse circulation (DTFR) water-well drill rigs to service the contract. Mounted on a highly mobile platform, these rigs can accommodate casing diameters of up to 28 inches (in.) and attain deep drill targets with a powerful 130,000-lb pullback. These rigs also use a closed-circulation mud system with a proprietary mud tank.