The magnetic hammer technology ... rod (rod-inside-rod) drill stem with dual threaded makeup. With a rated rotational torque of 1,500 ft.-lbs., the inner rod powers the downhole tri-cone as ...

Maker claims the pneumatic hammer can drill 6.25-in.-diameter holes at penetration rates of up to 150 ft. per hour HammerHead claims its Roughneck R500 rock drilling system can turn any horizontal ...

TAMPERE, FINLAND, SEPTEMBER 2013: Sandvik Mining has announced a significant performance upgrade to its DL401-series underground top hammer production drills, designed to ensure continued and high ...

Firestick dual-rod technology allows 7-percent downhole steerability and drilling in rock and in other underground construction. The horizontal direction drill’s threaded outer rod has a rotational ...

Mr. Fisher and others lobbied the Chilean government to let them use the drills, known as downhole hammers ... aided by the dry conditions encountered underground in the Atacama region of Chile ...

In the end, the T-130 rig pounded through first. It used a special “downhole hammer” drill, made by Center Rock, a company in western Pennsylvania, that contains pneumatic hammers that pound ...

Atlas Copco has launched two new versions of its well proven COP 1838 hydraulic rock drill – the COP 1838MUX and COP 1838HUX – which are intended for use in underground long-hole drilling.