National 110-UE Drawworks

Engine & Power System
• Rated Power: Approximately 1100 HP from a high‑performance diesel engine
• Drive System: Mechanical drive integrated with advanced hydraulic controls for efficient power transmission
Torque & Pullback Capacity
• Pullback Capacity: Designed to provide roughly 110 tons (≈220,000 lbs) of pullback force
• Torque Output: Engineered to deliver approximately 25,000–30,000 lb‑ft of torque, ensuring smooth and consistent cable handling
Drum & Cable Handling
• Drum Diameter: Typically in the range of 24–30 inches, optimized for efficient cable winding
• Cable Speed: Operates at controlled speeds around 40–50 ft/min for smooth, gradual cable movement
• Cable Capacity: Configured to handle long drill strings with high-cycle operation
Clutch & Brake System
• Low‑Speed Clutch: Features a multi‑plate clutch assembly for smooth engagement/disengagement under high load conditions
• Brake Assembly: Integrated friction brakes designed for rapid deceleration and precise control during operation
Hydraulic & Control Features
• Hydraulic System: Designed to operate at pressures up to about 2500 psi with precise control of feed and disengagement functions
• Digital Controls: Includes a digital control panel for real‑time monitoring of key parameters such as drum speed, torque, and hydraulic pressures, plus built‑in safety features like overload protection
Construction & Durability
• Materials: Constructed from high‑strength, heat‑treated alloy steel and other rugged components to ensure a long service life in harsh drilling environments
• Design Focus: Engineered for high‑cycle duty, providing reliability and ease of maintenance to reduce rig downtime
Overall System Dimensions & Weight
• Estimated System Weight: Approximately 20,000–25,000 lbs, ensuring stability during high‑load operations
• Installation: Designed for a compact, rugged footprint that integrates seamlessly into standard rig layouts