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The Oil Drill Pipe, Joint & Coupling Lathe Machine is a specialized CNC solution engineered for the high-precision machining of pipe threads in compliance with API and international standards. This equipment is specifically configured to handle the rigorous demands of heavy-duty oilfield tubular goods (OCTG) processing, ensuring structural integrity and leak-proof connections for drill pipes, tool joints, and couplings used in deep-well drilling operations.
Technical Design and Structural Characteristics
The machine features a large-bore spindle design with a double-chuck system, allowing for the stable clamping of long-axis workpieces. The bed is constructed from high-grade cast iron with a wide, induction-hardened guideway structure, providing the static and dynamic rigidity required to withstand heavy cutting forces during the threading of high-strength alloy steels. The integration of precision ball screws and high-torque servo motors ensures accurate pitch control, which is critical for tapered thread consistency and surface finish quality.
Core Technical Capabilities
- API Thread Profiling: Capability to execute precise threading for API 5DP, API 5CT, and premium connections including specialized tool joint profiles.
- Automated Tool Turret: Equipped with a high-speed indexing turret that facilitates rapid tool changes between turning, facing, and threading cycles.
- Workpiece Support Systems: Includes heavy-duty hydraulic pipe rests and rollers to maintain axial alignment and prevent vibration during the machining of extended drill pipe sections.
- CNC Control Precision: Advanced control systems provide real-time compensation for thermal expansion and tool wear, maintaining tight tolerances over long production runs.
Technical Specifications
| Parameter Description | Unit | Technical Value |
| Max. Swing Over Bed | mm | Φ630 - Φ1000 |
| Spindle Bore Diameter | mm | Φ130 / Φ200 / Φ225 / Φ280 |
| Spindle Speed Range | rpm | 10 - 600 (Variable) |
| Processing Pipe Diameter | inch | 2-3/8" - 10-3/4" |
| Turret Positions | pcs | 4 / 6 / 8 Vertical or Horizontal |
| X/Z Axis Positioning Accuracy | mm | 0.02 / 0.03 |
| Main Motor Power | kW | 15 / 18.5 / 22 |
Operational Advantages in Petroleum Equipment Manufacturing
Implementing this CNC pipe threading lathe into a production line significantly reduces cycle times for drill pipe tool joint refurbishment and new coupling manufacturing. The machine's architecture is optimized for high-precision drilling collar threading and the processing of wear-resistant belt surfacing areas. By utilizing a closed-loop feedback system, the lathe ensures that every joint meets the stringent safety requirements of the oil and gas industry, minimizing the risk of downhole failures.
Frequently Asked Questions
Q1: How does this machine ensure the precision of API standard threads over long-term continuous operation?
The precision is maintained through a combination of high-rigidity bed design and the specialized engineering expertise of Jiangsu Taiyuan CNC Machine Tool Co., Ltd. Established in 2003 in Taixing City, our company operates a 24,800 ㎡ facility dedicated to national petroleum equipment manufacturing. Our lathes feature a long precision retention time and minimal failure points due to our GBT and ISO-certified quality systems. The use of premium transmission components ensures that even under the high driving power required for drill collar thread machining, the equipment maintains the necessary pitch accuracy and taper consistency demanded by international users like Shanghai Baosteel and various global oilfields.
Q2: Can this lathe handle a variety of OCTG components beyond standard drill pipes?
Yes, the equipment is designed for high specificity and versatility. Jiangsu Taiyuan CNC Machine Tool Co., Ltd. produces a wide range of specialized tools, and this lathe can be integrated into a broader drill pipe production line. It is capable of processing couplings, drill collar outer circles, and tool joints. Furthermore, our product portfolio includes specialized machinery for screw pump rotor milling, bent shell turning, and mandrel threading. This wide application range in oil fields, geology, and mining industries is a result of our focus on "specialization, refinement and strengthening" in energy equipment manufacturing.
Q3: What level of technical support and reliability can international buyers expect?
Our products are recognized as "national quality trustworthy" and are currently utilized by major enterprises in the United States, Japan, South Korea, and Azerbaijan. Jiangsu Taiyuan CNC Machine Tool Co., Ltd. provides equipment characterized by simple structures for ease of maintenance and high production efficiency. Located beside the Yangtze River's golden waterway, we leverage our strategic location and decades of manufacturing experience to offer robust technical support and reliable delivery. We adhere to the concept of looking at global peers to ensure our machinery meets the evolving technical demands of the global energy sector.
