Products Description
Equipment Parameters
| Specification | Value |
|---|---|
| Model | YNJQ-470 |
| Bore Diameter | ￠470mm |
| Centre Height | 1570mm (Customizable, available for larger or smaller sizes) |
| Application | 60mm - 460mm (2-3/8" to 18") |
| Speed Range | Air-cooled hydraulic power, manual stepless speed control; Rotating head speed: 0.5-5.5r/min |
| Make-up/Break-out Torque | Max. make-up/break-out torque: 150,000 ft.lb (205 kN.m) @ 20MPa pressure |
| Application Scenarios | Make-up, break-out or verify connection integrity of high-torque threaded connections in tubulars (oil tubings, casing pipes, etc.), downhole tools/bottomhole assemblies including drilling tools and accessories (drill pipe, drill collar, drill bit, stabilizer, dowhole motors, etc.), completion tools and accessories (nipples, packer, tubing hanger, etc.), wellhead, fittings, and more. |
| Torque Display | The computer can display, record and control the torque and turns |
| Control Mode | Simens S7-1200 PLC + 15" all-in-one computer, operation with buttons; The machine will stop automatically reaching the setting torque |
| Torque Accuracy | 150 ft.lb |
| Dies Marking | According to API standards, no damage to pipe accuracy; Optional no-marking dies (Fe-free for special materials like chrome, and no marking on pipe surface) |
| Motor Power | 37kW (Customizable), ABB Frequency converter control |
| Hydraulic System | Max. pressure: 20MPa; Flow rate: 50-240L/min |
| Dimensions | Main machine: 6m × 1.77m × 2.26m (Customizable, available for larger or smaller sizes) |
| Total Weight | Approx. 20T |
| Power Tong | 360° full rotation |
| Connections | API (Round & BTC) and Premium connections (TS3SB, VAM, BDS, SEC, AB, ANTARES, T Blue, etc.) |
| Turns Accuracy | Resolution: 1/1000 |
| Torque Control Accuracy | Torque ≤ 3120N.m: ±5%; 3120N.m ≤ Torque ≤ 7800N.m: ±156N.m; Torque ≥ 7800N.m: ±2% |
| Qty. of Cylinders | 6 clamping cylinders for each power tong and backup tong |
| Eccentricity Range (Optional) | 0-200mm (Horizontal Offset) |
| Push/Pull (Optional) | Max. force: 15T-30T |
| Top-opening Tailstock (Optional) | Optional for supporting extra-long, heavy-load or large-diameter workpieces |
Note: The conversion for 205 kN.m to ft.lb is approximately 151,200 ft.lb.
I. Structures and Features
The YNJQ470 hydraulic bucking machine (also called as hydraulic makeup and breakout unit) is equipped with 6 hydraulic cylinders. During operation, the pipe remains fixed while the 6 cylinders work in sync to clamp the coupling and rotate continuously. Each cylinder controls one jaw, and the reliable synchronizer is imported from Italy. The backup tong can float slightly to automatically adjust its center. The clamping force is controlled by the hydraulic system.
This design offers several key advantages: broad application range, high mechanical strength, reliable clamping with no slippage, minimal pipe damage, small die marking in accordance with API standards, and high automation. Additionally, the machine features automatic speed regulation via a frequency converter, making it suitable for premium connections.
Main Parts of YNJQ470 Fully Rotational Bucking Machine:
Power Tong Assembly
Backup Tong Assembly
Electrical-hydraulic Control System
Control System (PLC + Upper Computer)
Key Parts Images
Control Cabinet and Torque-turn Curve of Bucking Unit
Non-marks Dies
II. Scope of Supply
| No. | Name | Qty. (set/pcs) | Remarks |
|---|---|---|---|
| 1 | Bucking machine | 1 set | Includes power tong assembly, backup tong assembly, basement, and two moving supports. |
| 2 | Hydraulic unit | 1 set | Includes hydraulic pump, valves, integrated package, oil tank, motor, fan cooler, and pipeline. |
| 3 | Control cabinet | 1 set | Includes control panel, computer, and control box. |
| 4 | Dies | 10 pcs | — |
| 5 | Micro-dies | 10 pcs | — |
| 6 | Documents | 1 set | Includes QC certificate, warranty certificate, operation & maintenance manual, installation drawing, and e-drawing. |
III. Reference Images of YNJQ470 Bucking Unit
1. YNJQ470 Bucking Unit with Push/Pull Exported to Iran
2. Standard YNJQ470 Bucking Unit
3. YNJQ470 Bucking Unit with Top-opening Tailstock Exported to Qatar
The backup tong (Tailstock) adopts an top-opening structure for clamping the pipe body. The opening mechanism is driven by a hydraulic cylinder, allowing the top jaw to lift and open, which facilitates quick hoisting of the workpiece at the open position. The backup tong is mounted on a sliding trolley and can move along with the threads during make-up and break-out operations. And it is also equipped with a lock mechanism, which secures the top-opening structure when the opening function is not in use, effectively providing safety protection.
4. YNJQ470 Bucking Unit with Eccentric Mechanism Exported to Russia
5. YNJQ470 Bucking Unit for CNOOC
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