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Hardware & tools
23/8 API IF Box to REG Box Sub Adapters China Factory Suppliers
Leading China factory and suppliers of high-precision 2-3/8 API IF Box to REG Box sub adapters. Made from 42CrMo alloy steel for water well, mining, and HDD oil and geological exploration. Durable drill connectors with superior mechanical properties.
SupplierHEJIAN YINRUH DRILL BIT MANUFACTURE CO., LTD.www.yhrockdrill.com
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About this product
Product information from the supplier.
The 2-3/8” API IF Box to 2-3/8” API REG Box Sub Adapter is a high-precision connection component engineered for seamless integration between drill bits and drill rod joints. Specifically designed for the rigorous demands of well drilling and geological exploration, this adapter ensures a secure, leak-proof transition between different thread standards, maintaining structural integrity under extreme torque and pressure.
Manufactured from premium 42CrMo/35CrMo alloy steel, our sub adapters provide exceptional mechanical strength and wear resistance. By adhering to strict API standards and implementing a rigorous multi-stage quality control process, we provide drilling operators with a reliable solution that minimizes downtime and optimizes the efficiency of drilling rig operations in challenging subterranean environments.
Detailed Parameters
| Thread Type | Box-to-Box | Connection Size | 2-3/8” API IF box to 2-3/8” API REG box |
|---|---|---|---|
| Material Grade | 42 CrMo / 35CrMo Alloy Steel | Product Length | 50-70mm |
| Primary Application | Well Drilling & Geological Exploration | Compatible Tools | NC26, NC31, NC38, NC40, NC46, NC50 |
| Manufacturing Standard | API Standard Compliant | Inspection Method | Non-destructive Testing (NDT) |
| Surface Treatment | Cleaned and Breach Oil Coated | Quality Certification | API, SGS, or Third-Party Verified |
Key Advantages
Premium Material
Forged from 42CrMo/35CrMo steel for superior hardness and fatigue resistance in deep-hole drilling.
Extended Service Life
Precision machining and heat treatment reduce wear and tear, lowering the frequency of tool replacements.
API Standard Fit
Guaranteed compatibility with API IF and REG thread specifications for a perfect, secure seal.
Versatile Integration
Compatible with a wide range of NC connections (NC26-NC50), making it ideal for various rig setups.
Rigorous QC Testing
Every unit undergoes nondestructive inspection to ensure zero defects before leaving the factory.
Third-Party Verified
Supports quality audits from SGS and other internationally recognized certification bodies.
Product Gallery
Management Platforms
Raw Material Sourcing
Materials are booked exclusively from renowned large-scale steel enterprises in China to ensure base metal purity.
Lab Testing
Internal factory laboratories conduct stress and hardness tests on every batch of tool joints.
NDT Inspection
100% nondestructive testing is performed to detect internal cracks or surface flaws prior to finishing.
Surface Protection
Professional cleaning and breach oil application prevent corrosion during transit and storage.
QC Validation
Dedicated QC staff verify all dimensional tolerances against API technical drawings.
Client Audit Support
Open-door policy for client-appointed third-party inspectors such as SGS for final quality sign-off.
Investment Return Comparison
| Performance Metric | Standard Adapters | Premium API Sub Adapters |
|---|---|---|
| Operational Lifespan | Short to Medium | Extended (High-Durability) |
| Thread Precision | General Tolerance | API Tight-Tolerance Fit |
| Material Strength | Basic Carbon Steel | 42CrMo/35CrMo Alloy |
| Downtime Risk | Moderate (Frequent Wear) | Low (Reliable Performance) |
| Total Cost of Ownership | Higher (Due to Replacements) | Lower (Long-term Efficiency) |
Frequently Asked Questions
Q: What is the primary difference between API IF and API REG boxes?
API IF (Internal Flush) and API REG (Regular) differ in their thread taper, pitch, and strength profiles. Our sub adapter allows you to transition between these two standards without needing to replace your entire drill string.
Q: Why is 42CrMo/35CrMo used for these adapters?
These chromium-molybdenum alloys provide a superior balance of toughness, hardenability, and strength, which is essential for resisting the high torque and compressive loads encountered in petroleum and geological drilling.
Q: Can these sub adapters be used for HDD (Horizontal Directional Drilling)?
Yes, provided the thread specifications match. Our adapters are designed for a variety of specialized drilling applications, including well drilling and heavy-duty geological exploration.
Q: How do you ensure the quality of the threads?
We use precision CNC machining and follow API standards. Every joint is checked by our QC staff and subjected to nondestructive inspection to ensure there are no micro-cracks in the thread roots.
Q: Is third-party inspection available before shipment?
Absolutely. We welcome clients to send their own QC representatives or appoint third-party agencies such as SGS to verify the quality and specifications of the products before delivery.
Q: What is the typical length of these sub adapters?
Our standard 2-3/8" API sub adapters typically range from 50mm to 70mm in length, providing a compact yet strong connection point.
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HEJIAN YINRUH DRILL BIT MANUFACTURE CO., LTD.
