Rebuilt National 1320-UE Drawworks

Description

National 1320‑UE Drawworks – Typical Specifications

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

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