Products Description
The YGJ168 Oil Tubing and Casing Straightening Machine is a professional steel pipe straightening equipment specially developed to repair bent oil tubing, casing and round bars in oilfield industries. It is applicable to pipes with outer diameter of Φ73–168mm, featured with 7-roll inclined quick-open structure in 2-2-1-1-1 layout.
The front five rollers complete rough straightening work, while the rear three staggered rollers finish fine straightening. Supported by frequency conversion speed control system, it runs at 5-20m/min and reaches straightening accuracy within ≤1.5mm/m. Adopting hyperbolic roller structure, it increases pipe contact area, lowers residual stress, protects pipe surface and removes attachments as well as oxide skin efficiently. It is widely applied in oilfield pipe maintenance, steel pipe production and metal processing fields, and customized services are available.
Key Features & Specs
7-Roll Inclined Design for High Precision
Adopts 2-2-1-1-1 seven-roll inclined structure. Front 5 rollers for rough straightening and rear 3 staggered rollers for fine straightening, ensuring stable straightening accuracy ≤1.5mm/m.
Oil Tubing & Casing Specialized Design
Purpose-built for oilfield tubing and casing straightening work. Suitable for pipes within Φ73–168mm, capable of straightening pipes with initial straightness deviation up to ≤50mm/m.
High Efficiency & Wide Application Range
Supported by stepless frequency conversion speed regulation, the working speed ranges from 5 to 20m/min, which can meet diverse straightening demands for different pipe specifications.
Hyperbolic Roller Technology
Hyperbolic roller design optimizes contact area with pipes, effectively improving straightening effect, reducing residual stress, avoiding pipe surface damage and stripping surface attachments and oxide layers easily.
Intelligent PLC Control System
Equipped with Siemens S7-1200 PLC and 15-inch industrial PC, supporting automatic and push-button operation. Straightening pressure can be adjusted freely according to pipe diameter and wall thickness. Configured with two 55kW main motors and one 15kW hydraulic unit motor.
Equipment Parameters
| Specification | Value |
|---|---|
| Model | YGJ168 |
| Number of Straightening Rolls | 7 rolls (4 top rolls, 3 bottom rolls) |
| Straightening application | Ø73-Ø168mm |
| Roll Configuration | 2-1-2-1-1 seven-roll inclined arrangement |
| Straightness tolerance before being straightened | ≤ 50mm/m |
| Working speed | 5~20m/min |
| Straighten accuracy | ≤ 1.5mm/m |
Roll Drive System | Electrically drive |
| Main motor power | 55kW×2 |
| motor power of hydraulic unit | 15kW |
| working pressure of hydraulic system | 10MPa |
Control System | Siemens S7-1200 PLC + 15" industrial PC control ,PLC auto control / Push-button operation |
| Equipment Weight | 35T |
Note: The conversion for 10 MPa to psi is approximately 1,450 psi.
I. YGJ168 Oil Tubing and Casing Straightening Machine Structures and Features
1. Overview
YGJ168 straightening machine is designed for straightening bent pipes and bars ranging from 60mm to 132mm. It adopts a 2-2-1-1-1 seven-roll inclined structure with hyperbolic rollers to ensure stable contact and efficient straightening.The front five rolls complete rough straightening, and the rear three rolls achieve precision straightening up to ≤0.5mm/m straightness. Driven by a frequency conversion motor, pressure can be adjusted flexibly based on pipe diameter and wall thickness.It features high efficiency, good straightening quality, low residual stress and smooth surface, effectively extending service life while removing scale and attachments inside and outside the pipe.
2. Process Workflow
Feeding Pipe → Pipe Flipping → Conveying by Transmission Rollers → Rough Straightening → Fine Straightening → Collar Bypass Handling → Reciprocating Straightening → Discharge to Output Rack → Next Cycle
3. Main Parts of YGJ120 Pipe Straightening Machine
(1) Main machine
1) Machine Frame
2) Upper Straightening Rollers System
3) Upper Rollers Slope Angle Regulating System
4) Bottom Straightening Rollers System
5) Pressing Down Adjusting Cylinder Assembly
(2) Traightening Roller
(3) Charging & discharging table
(4) Hydraulic system
1) Hydraulic Unit
2) Valves
3) Integrated Block
4) Pipelines
5) Fan Cooler or Water Cooler
(5) Electrical Control System
1) Electric control cabinet
2) Ampere Meter
3) Voltage Meter
4) Indicator Light
5) Switches and Buttons
II. Scope of Supply
1.Main machine
| No. | Equipment Name | Quantity (Set) |
|---|---|---|
| 1 | Machine Frame | 1 |
| 2 | Upper Straightening Rollers System | 1 |
| 3 | Upper Rollers Slope Angle Regulating System | 1 |
| 4 | Bottom Straightening Rollers System | 1 |
| 5 | Pressing Down Adjusting Cylinder Assembly | 1 |
| 6 | Charging Table with Turn-Over Plates | 1 |
| 7 | Discharging Table with Saving Rack | 1 |
| 8 | Point Straightening Device (for blind areas) | 1 |
2. Hydraulic System
| No. | Equipment Name | Quantity (Set) |
|---|---|---|
| 1 | Hydraulic Unit | 1 |
| 2 | Valves | 1 |
| 3 | Integrated Block | 1 |
| 4 | Pipelines | 1 |
| 5 | Fan Cooler or Water Cooler | 1 |
3. Electrical Control System
| No. | Equipment Name | Quantity (Set) |
|---|---|---|
| 1 | Electric Control Cabinet | 1 |
| 2 | Ampere Meter | 1 |
| 3 | Voltage Meter | 1 |
| 4 | Indicator Light | |
| 5 | Switches and Buttons | 1 |
III. Referenced Images of YGJ120 Pipe Straightening Machine
1. YGJ120 Pipe Straightening Machine to Hebei Province
FAQ
Q1. What pipe sizes can the YGJ168 oil tubing and casing straightening machine handle?
A1. The YGJ168 oil tubing and casing straightening machine is suitable for steel pipes and round bars with outer diameter from Φ73mm to Φ168mm, perfectly matching daily straightening work of oilfield tubing and casing.
Q2. What is the straightening accuracy of this 7-roll pipe straightening machine?
A2. This 7-roll pipe straightening machine can achieve straightening accuracy of ≤1.5mm/m, and it is able to straighten pipes with initial bending degree up to ≤50mm/m efficiently.
Q3. What is the working speed of the YGJ168 steel pipe straightener?
A3. The working speed of the YGJ168 steel pipe straightener is adjustable between 5m/min and 20m/min via advanced frequency conversion control system.
Q4. Why choose a 7-roll design instead of a 5-roll straightening machine?
A4. The 2-2-1-1-1 seven-roll inclined structure integrates rough straightening and fine straightening in one process. Compared with traditional 5-roll straightening machine, this 7-roll straightening machine owns higher straightening precision, better pipe surface protection effect and more obvious effect on reducing internal residual stress.
Q5. What are the power requirements of the YGJ168 oil tubing and casing straightening machine?
A5. The YGJ168 oil tubing and casing straightening machine is configured with two 55kW main drive motors and one 15kW hydraulic station motor, delivering sufficient power support for continuous high-load oilfield pipe straightening production.
Boyu Petroleum Equipment has more than 30 years of rich experience in independent research, development and production of oilfield equipment. Our main products cover oil tubing and casing straightening machines, steel pipe hydrostatic testing machines, hydraulic bucking units and other professional oilfield equipment.
If you are in need of reliable oilfield pipe straightening equipment and complete oil tubing & casing repair solutions, please feel free to contact us to obtain detailed technical parameters and official YGJ168 product quotation.
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