Products Description
The YNJX160 Planetary Clamping Bucking Unit is a professional hydraulic bucking machine designed for precision make-up and break-out of oilfield tubing, casing, perforating gun assembly line, and downhole tools. It supports pipe O.D. 60–140mm (2‑3/8" to 5‑1/2") and delivers a maximum torque of 20 kN·m (14,751 ft·lb) at 20MPa. Equipped with Siemens S7‑1200 PLC and 15" industrial computer, it ensures accurate torque and turns monitoring, automatic operation, and stable performance. The power tong adopts a planetary cam clamping mechanism with four-point uniform clamping, featuring automatic dual-speed shifting and automatic reversing for make-up and break-out operations. The backup tong uses three hydraulic cylinders positioned at 120° intervals for non-marking clamping. Optional non-marking dies are available for chrome and premium threads. Widely used in perforating gun assembly, tubing and casing production and repair lines. Custom solutions available.
Key Features & Specs
High Torque & API Compliance
Delivers up to 20 kN·m (14,751 ft·lb) maximum makeup torque at 20MPa pressure. Meets API standards with reliable clamping and die marking.
4-Point Planetary Cam Clamping System
Power tong adopts planetary cam clamping mechanism with four cams driven by planetary gears, forming four-point uniform clamping around the 360° circumference of the coupling. Clamping force is automatically proportional to applied torque.
Automatic Dual-Speed Operation
Features automatic two-speed shifting and automatic reversing for make-up and break-out operations. Power tong is driven by dual hydraulic motors, capable of bidirectional rotation.
Intelligent Control & Data Traceability
Configured with Siemens S7-1200 PLC and 15" industrial computer, supporting auto/manual operation. All torque and turn data are automatically recorded for complete traceability.
Equipment Parameters
| Specification | Value |
|---|---|
| Model | YNJX-160 |
| Bore Diameter | Φ 160m (~Φ 6-1/4'') |
| Centre Height | 950mm (Customizable, available for larger or smaller sizes) |
| Application | O.D. 60-140mm (Φ 2-3/8'' to 5-1/2'') |
| Speed Range | Rotation speed: 1-20r/min (automatic gear shifting and reversing) |
| Make-up/Break-out Torque | Max. make-up/break-out torque: 14,751 ft.lb (20 kN.m) @ 20MPa pressure |
| Application Scenarios | Perforating gun assembly line and make-up, break-out tubulars including tubing, casings, and downhole tools or assemblies |
| 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: 16-20MPa; Flow rate: 20-120L/min |
| 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% |
| Air Pressure | 0.4-0.6MPa (Provided by user) |
Note: The conversion for 50 kN.m to ft.lb is approximately 36,878 ft.lb.
I. YNJX160 Planetary Clamping Bucking Unit Structures and Features
The YNJX160 bucking machine，as a professional hydraulic bucking machine and oilfield bucking unit, adopts a planetary jaw (cam) clamping mechanism in the power tong. Four sets of planetary gears drive four cams arranged at 90° intervals, and the cams are clamped through friction bands. This structure provides a wide clamping range, high overall strength, and requires no tooling changes. The backup tong uses three hydraulic cylinders positioned at 120° intervals for make-up and break-out operations. It also features a wide clamping range, high structural strength, no need for tooling replacement, and can achieve clamping without leaving marks.
Power Tong Assembly
A. The power tong adopts an enclosed tong head to clamp the coupling. It is fixed to the base and does not move with the threads.
B. The power tong is driven by dual hydraulic motors, capable of bidirectional rotation. It supports automatic two-speed shifting and automatic reversing for make-up and break-out operations.
C. Clamping mechanism: Four cams are driven by planetary gears to perform clamping. Each cam is equipped with a die, forming four-point uniform clamping around the 360° circumference of the coupling. The clamping force is automatically proportional to the applied torque — the greater the torque, the deeper the dies bite into the coupling, and vice versa. This design ensures minimal die marks on the coupling while achieving the required torque.
Backup Tong Assembly
A) The backup tong adopts a three-cylinder enclosed clamping mechanism to grip the pipe body. It is mounted on a sliding carriage and can move along with the threads during make-up and break-out operations.
B) Clamping is achieved through synchronized actuation of the three cylinders, controlled by a synchronous motor. The motor ensures synchronization but does not rotate.
C) A tension/compression sensor is installed on the backup tong support to accurately measure the torque during make-up and break-out. Torque is calculated by multiplying the measured force by the length of the moment arm.
D) The forward and backward movement of the backup tong is driven by a pneumatic cylinder, with a maximum stroke of 0.8 meters.
E) The backup tong has a slight floating capability to accommodate fine threads and minor bending of the workpiece.
F) The maximum pass-through diameter of the backup tong is Ø180 mm.
Main Parts of YNJX160 Planetary Clamping Bucking Machine:
1) Power Tong Assembly
2) Backup Tong Assembly
3) Electrical-hydraulic Control System
4) 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 YNJX160 Bucking Unit
1. Standard YNJX160/20 Bucking Unit
2. YNJX160/20 Bucking Unit to CNPC, China Image Set 1
3. YNJX160/20 Bucking Unit to CNPC, China Image Set 2
4. Perforating Gun Assembly Line (YNJX160 Bucking Unit)
5. Traditional YNJX160/20 Bucking Unit
FAQ
Q1. What pipe sizes does the YNJX160 planetary clamping bucking unit handle?
A1. The YNJX160 planetary clamping bucking unit supports pipe O.D. 60–140mm (2‑3/8" to 5‑1/2"), covering oilfield tubing, casing, and perforating gun assembly components.
Q2. What is the maximum torque of this tubing perforating gun assembly machine?
A2. It provides a maximum make-up and break-out torque of 20 kN·m (14,751 ft·lb) @ 20MPa pressure.
Q3. What clamping technology does this API makeup breakout unit use?
A3. The power tong adopts a planetary cam clamping mechanism with four-point uniform clamping. The backup tong uses three hydraulic cylinders positioned at 120° intervals for non-marking clamping.
Q4. What control modes does it support?
A4. It supports manual operation, automatic button control, and microcomputer automatic control. The machine features automatic two-speed shifting and automatic reversing for make-up and break-out operations.
Q5. Do you support customized solutions?
A5. Yes. We provide personalized custom services and complete oilfield equipment solutions. Contact us to get the latest quotation and technical parameters.
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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