HDD Rigs: Equipment Spotlight

September 2012, Vol. 67 No. 9
TT Technologies Grundodrill 4X

Astec Underground
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The Astec EarthPro Series DD-2024 provides 20,000 pounds of thrust/pullback force with the capability of up to 2,400 foot-pounds of rotary torque. The maximum rotary speed can reach up to 200 rpm. The drill weighs 10,500 pounds, and is 207 inches long by 51.5 inches wide. The DD-2024 is powered by an 85-hp Cummins turbocharged diesel engine. It also has an onboard Triplex mud pump that can produce up to 30 gallons per minute at up to 1500 psi. This drill also boasts the field-proven Quad rack-and-pinion carriage drive and a floating carriage that is capable of two speeds, including a 120 ft/min fast mode for adding and removing rods. 800.527.6020, astecunderground.com

Ditch Witch
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With 100,000 pounds of pullback and 12,000 foot-pounds of torque, the JT100 All Terrain is built for extended-range bores and installations of large-diameter pipe. The machine's 268-hp engine delivers more raw power more efficiently to all machine functions so the installation can be completed faster. And with its exclusive, patented two-pipe drilling system, the JT100 All Terrain can install pipe in most ground formations, including solid rock. A mechanical motor system transfers more power to the bit and its unique shaft-within-a-pipe design features a strong, hex-shaped rod that turns inside an outer pipe. The inner hex shaft works as a mechanical motor that drives the bit during the bore; the outer pipe thrusts the bit forward, steers the drill string, and works to transmit full machine torque during backreaming. 800.654.6481, ditchwitch.com