Products Description
The YNJG230 Wedge Roller Bucking Unit is a professional hydraulic-pneumatic oilfield bucking machine designed for precision makeup and breakout of oilfield tubing and casing. It supports pipe O.D. 60–230mm (2‑3/8" to 7") and delivers a maximum torque of 30kN·m at 20MPa. Equipped with Siemens S7‑1200 PLC control, it ensures accurate torque and turns monitoring, automatic operation, and stable performance. Adopting API-standard clamping structure, this tubing casing bucking machine provides reliable gripping without damaging pipe threads, widely used in OCTG production and repair lines.
Equipment Parameters
| Specification | Value |
|---|---|
| Model | YNJG-230 |
| Bore Diameter | Φ 230m (~Φ 9'') |
| Centre Height | 1000mm |
| Application | O.D. 60-230mm (Φ 2-3/8"-2-7/8"-3-1/2"-4-1/2"-5-1/2"-7") |
| Speed Range | Rotation speed: Low gear 1-7r/min, High gear 1-21r/min (Empty load can reach 40r/min) |
| Make-up Torque | Max. make-up torque: 22,127 ft-lb (30kN.m for low gear; 10kN.m for high gear) @ 20MPa pressure (Customizable, available for higher torque) |
| Application Scenarios | Mainly used in production and repair lines for tubular products such as casing and tubing, etc. |
| 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 | 15kW (Customizable), ABB Frequency converter control |
| Hydraulic System | Max. pressure: 20MPa; Flow rate: 40-180L/min |
| Dimensions | Main machine: 3m × 1.35m × 1.65m (Customizable, available for larger or smaller sizes) |
| Total Weight | Approx. 4.5T (Customizable) |
| Operation | Auto/Manual |
| Connections | API (Round & BTC) and Premium connections (TS3SB, VAM, BDS, SEC, AB, ANTARES, T Blue, etc.) |
| Turns Measurement Resolution | 1/1000 |
| Torque Control Accuracy | Torque ≤ 3120N.m: ±5%; 3120N.m ≤ Torque ≤ 7800N.m: ±156N.m; Torque ≥ 7800N.m: ±2% |
| Air Pressure | 0.4-0.8MPa (Provided by user) |
| Production Speed | For pipe ≤ 5-1/2'', 3-4 threads remained, 60-70 pieces/hour |
| Load Table (Optional) | Also called as auxiliary machine, handling system or transmission line to feed pipes |
Note: The conversion for 30 kN.m to ft.lb is approximately 22,127 ft.lb.
I. YNJG230 Wedge Roller Bucking Unit Structures and Features
Model YNJG230 bucking machine is a special-purpose equipment used to make up and breakout the coupling and pipe (oil tubing, casing pipe, etc.).
The power tong assembly is responsible for initiating rotation and making up (or breaking out) the coupling, while the backup tong assembly is used to clamp the pipe body. The power tong is driven by a hydraulic motor, and the clamping and shifting of the backup tong are powered by pneumatic cylinders. The make-up/break-out torque is measured by a load sensor located at the lower end of the backup tong and is displayed on the computer at the operation console, with automatic control managed by the PLC system. This machine can finish the work of 2-3/8"-7" diameter casing and tubing , corresponded jaw plate includes: Φ 2-3/8"-3-1/2"-4''-4-1/2"-5''-5-1/2"-6-5/8''-7".
The Structure Features
1) Driven and controlled by hydraulic and pneumatic system, and easy and convenient to operate.
2) Controlled by pneumatic, except for the power tong which driven by hydraulic motor, it can greatly reduce the oil leakage.
3) The power tong uses closed structure, it is driven by hydraulic motor, the clamp head has 3 jaw plates with 120 º distributing, every jaw plate has 3-4 dies, totally 9-12 dies contacting the coupling surface, the die marks are according to API standard, the clamp head can reset automatically.
4) The power tong and backup tong can regulate their center in one line automatically to meet the requirements of using.
5) Backup tong is similar to the power tong, but it is driven by the pneumatic cylinder.
6) The backup tong is equipped with load sensor used to measure torque (unit:ft-lb or N.m). The control system will contrast the torque value and screw turns with the set value, control the working automatically.
7) Easy to change dies.
This design offers several key advantages: high and low gear rotating, efficient operation, simple controls, and stable performance. It allows for quick die replacement, with a design that ensures reliable clamping and API-compliant die marks. An automatic positioning mechanism enables fast and accurate tong head reset after bucking. Additionally, the power tong and backup tong can automatically center, accommodating slightly bent tubing, casing, and couplings.
Main Parts of YNJG230 Bucking Machine
1) Power Tong Assembly
2) Backup Tong Assembly
3) Electrical-hydraulic Control System
4) Control System (PLC + Upper Computer)
5) Frame Base
6) Pneumatic System
List of Jaw Plates
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 | 1 set | Material: 20CrMnTi |
| 5 | Jaw Plate | 1 set | According to technical agreement |
| 6 | Documents | 1 set | Includes QC certificate, warranty certificate, operation & maintenance manual, installation drawing, and e-drawing. |
III. Reference Images of YNJG230 Bucking Unit
1. Standard YNJQ230/30 Bucking Unit
2. YNJG230/30 Bucking Machine to Shandong, China
3. YNJG240/30 Bucking Machine Exported to India
4. YNJG230/30 Bucking Unit Exported to Kazakhstan
5. YNJG230/30 Bucking Unit Exported to Iran
6. YNJG230/30 Bucking Unit with Loading Table
FAQ
Q1. What pipe sizes does YNJG230 Wedge Roller Bucking Unit fit?
A1. The YNJG230 Wedge Roller Bucking Unit supports pipe O.D. 60–230mm (2‑3/8" to 7"), covering most commonly used tubing and casing sizes in oilfield applications.
Q2. What is the maximum torque of this tubing casing bucking machine?
A2. This oilfield bucking machine offers a maximum makeup/breakout torque of 30kN·m (22,127ft‑lb) at 20MPa hydraulic pressure, with customizable high-torque options available.
Q3. Is YNJG230 API pipe bucking unit compliant with API standards?
A3. Yes, this API pipe bucking unit fully meets API specifications. It uses standard dies and supports optional non-marking dies to protect premium and chrome pipes.
Q4. What control system does YNJG230 oilfield bucking machine use?
A4. It adopts Siemens S7‑1200 PLC + 15" industrial computer for auto/manual operation, real-time torque-turn recording, and automatic stop at preset torque values.
Q5. What is included in the standard supply of YNJG230?
A5. The standard package includes the main YNJG230 Wedge Roller Bucking Unit, hydraulic unit, control cabinet, full set of dies and jaw plates, plus complete operation, warranty and technical documents.
Boyu Petroleum Equipment owns over 30 years of professional experience in R&D and manufacturing of hydraulic bucking units, steel pipe hydrostatic testing machines, and pipe straightening machines.
If you need professional pipeline hydrotesting equipment and oilfield bucking unit solutions, please contact us for detailed parameters and quotation.
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