Rebuilt National 1320-UE Drawworks

Engine & Power System
• Engine Rating: 2000 HP diesel engine
• Drive System: Combines robust mechanical and hydraulic elements for efficient power transmission and improved fuel efficiency
Torque & Pullback Capacity
• Pullback (Line Pull) Capacity: Typically in the range of approximately 180–220 tons (roughly 360,000–440,000 lbs), designed to manage heavy drill strings and cable loads
• Torque Output: Delivers high torque—often around 35,000–40,000 lb‑ft—to ensure smooth, controlled cable handling during drilling operations
Drum & Cable Handling
• Drum Diameter: Usually configured with a drum diameter in the 30–36 inch range for optimal cable capacity and efficiency
• Cable Speed: Operates at controlled speeds (generally between 40–60 ft/min) for precise cable movement and minimal shock loading
• Cable Capacity: Engineered for high-cycle operations, supporting extended drilling runs
Clutch & Brake System
• Low‑Speed Clutch: Features a multi‑plate clutch system designed for smooth engagement/disengagement at low speeds under heavy torque
• Brake Assembly: Integrated friction brakes provide rapid, controlled deceleration and effective cable control
• Heat Dissipation: The clutch and brake components incorporate thermal management features to maintain performance over extended cycles
Hydraulic & Control Features
• Hydraulic System: Typically operates at pressures up to about 2500–3000 psi to deliver precise control over feed and disengagement functions
• Digital Control Interface: Includes a digital control panel that monitors key parameters—drum speed, torque, and hydraulic pressure—and provides safety features such as overload protection and emergency shutdown
Construction & Durability
• Materials: Constructed from high‑strength, heat‑treated alloy steel and other rugged components designed to endure harsh drilling environments
• Overall Weight & Footprint: The complete system generally weighs between 25,000–30,000 lbs, with a design that integrates seamlessly into standard rig layouts
• Maintenance: Engineered for long service intervals and ease of maintenance, reducing downtime in high‑cycle drilling operations