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The Atlas Copco RD20 is a truck-mounted rotary, deep-hole drill designed for oil, gas, and coalbed methane drilling. Mounted on a 380-hp, 5-axle, 10 x 6-ft tridem carrier, with manually controlled Detroit lockers on all three rear axles, it can reach most locations under its own power. The separate truck engine and drive train are designed to move the rig down the road at standard highway speeds and provide ample power for off-the-road maneuverability. From the time the unit arrives on location, it typically can be rigged up and be drilling in 1 to 3 hr, with rig-down equally fast. With a 755-hp rig engine and available air-on-board, the rig can handle air-rotary and DHD drilling. Converting for mud service can take less than 15 min. With an Atlas Copco disconnect box, the compressor can be removed from the power train, saving fuel and wear. The two-cylinder carriage feed system and hydraulic top-head drive are designed to deliver 120,000 lb of pullback and 30,000 lb of pulldown force.

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