01How does Kaiyue control the raw material quality of RC reverse circulation drill pipe?
All steel materials are purchased from qualified large steel mills, and each batch is inspected after arrival before it is released for production.





A professional-grade RC double-wall drill bit designed specifically for mineral exploration and hydrogeological sampling. Its superior thread seal and high wear resistance ensure continuous, stable, and high-precision coring operations even under extremely harsh geological conditions.

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All steel materials are purchased from qualified large steel mills, and each batch is inspected after arrival before it is released for production.
Kaiyue drill pipe bodies use R780 steel, selected for strength and durability in demanding drilling conditions.
The upset ends increase the friction-welding contact area, helping improve joint strength and reduce the risk of connection fracture.
All friction-welded areas are tempered after welding to reduce internal stress and improve long-term structural stability.
The coupling is made from 42CrMo steel and processed through overall heat treatment and deep nitriding.
The coupling core hardness is about HRC 34, while the nitrided surface hardness can reach about HRC 57 for a balance of toughness and wear resistance.
Quality control runs from rough machining through welding, heat treatment, nitriding, threading, and final inspection before shipment.
Stable raw materials, strengthened pipe ends, treated welds, and inspected couplings help lower the risk of equipment failure during drilling operations.
Yes. Kaiyue is a source manufacturer that can provide factory-direct pricing, stable production control, and practical after-sales support.
Yes. Trial orders are welcome so customers can inspect machining quality, connection strength, packaging, and onsite performance before larger purchases.
Please provide diameter, length, thread or coupling type, quantity, drilling rig model, working depth, formation condition, and destination port.
Yes. As the original manufacturer, Kaiyue can support model confirmation, production follow-up, shipment coordination, and after-sales communication.
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Send product and working condition details to our engineer for matching and quotation.