In oil and gas drilling operations, bucking units (pipe threading machines) are essential for achieving secure, API-compliant threaded connections. Boyu Petroleum Equipment offers three distinct technologies – Wedge Roller (WR), Fully Rotational (FR), and Planetary Clamping (PC) – each engineered for specialized operational requirements.
1. Wedge Roller (WR) Series: YNJG
Core Technology: Roller Ramp Clamping Mechanism
Key Advantage: High-speed operation & API compliance
Optimized for oil casing/tubing manufacturing and repair in high-RPM environments. The roller-based system maintains precise torque control while achieving over 30 RPM make/break speed, eliminating pipe slippage while ensuring full compliance with API 5CT/5B thread standards. The WR series features:
· Dual-roller clamping system with automatic centering
· Integrated torque monitoring (±2% accuracy)
· API-compliant thread protection system
Ideal For: Tubing mill production lines, high-volume repair shops requiring batch processing of API standard connections.
2. Fully Rotational (FR) Series: YNJQ
Core Technology: Hydraulic Cylinder Clamping + 360° Continuous Rotation
Key Advantage: Extreme torque capacity & tool-free operation
Designed for downhole tools, drill pipes, and large-diameter casings. The FR series delivers up to 150,000 N·m torque output with continuous rotation capability, featuring:
· Self-locking jaws adapt to Ø60-340mm pipe diameters
· Rexroth hydraulic system with 40% energy saving
· No need for jaw changes during operation
Ideal For: Rig floor tool assembly, heavy-duty rental tool providers handling large-diameter connections.
3. Planetary Clamping (PC) Series: YNJX
Core Technology: Multi-jaw Planetary Gripping System
Key Advantage: Universal adaptability & simplified operation
Specialized for sucker rods, thick-wall pipes, and downhole pumps. The PC series features:
· Self-centering jaws automatically adjust to Ø25-180mm diameters
· Handles non-cylindrical profiles (including pump squares)
· Reduces operator training time by 50% compared to conventional units
Ideal For: Well service operations, pump maintenance facilities requiring versatile pipe handling.
Technical Comparison Matrix
Feature | WR Series (YNJG) | FR Series (YNJQ) | PC Series (YNJX) |
Clamping Method | Roller Ramp | Hydraulic Cylinder | Planetary Jaws |
Performance | High-speed (≥30 RPM) | Full rotation + 150kN·m torque | Tool-free diameter adaptation |
Typical Pipe | API OCTG/Casing | Drill Pipe/Heavy Tools | Sucker Rods/Thick-wall Pipe |
Efficiency Gain | 30% faster batch processing | 90% jaw change reduction | Zero setup time for mixed pipes |
Standards | API 5CT/5B | API 7-1/7-2 | API 11B/11AX |
