The conversion joint connects upper and lower drill tools in rock, anchor, oil, and water well drilling. Made from alloy steels (35CrMo, 42CrMo, 4137H), it undergoes heat treatment and surface processing (phosphating/nitriding) for enhanced wear resistance, preventing thread failure. Precision CNC machining ensures tight fit and interchangeability. Custom sizes and specs are available.
| Generally coupling/adapter sub are API standard thread | |||||
| full-hole (FH) style connection threads | |||||
| 31/2"FH | 4"FH | 41/2"FH | 51/2"FH | 65/8"FH | |
| Internal-flush (IF) style connection threads | |||||
| 23/8"IF | 27/8"E | 31/2"F | 4"IF | 41/2"IF | 51/2"IF |
| Regular (REG) style connection threads | |||||
| 23/8"REG | 27/8"REG | 31/2"REG | 41/2"REG | 51/2"REG | 65/8"REG |
| 75/8"REG | 85/8"REG | ||||
| Number (NC) style connection threads | |||||
| NC16 | NC23 | NC26 | NC31 | NC35 | NC38 |
| NC40 | NC44 | NC46 | NC50 | NC56 | NC61 |
| NC70 | NC77 | ||||
Robust Construction & Durability: Made from high-strength alloy steels (35CrMo, 42CrMo, 4137H) with heat treatment and surface nitriding/phosphating. Ensures wear resistance, prevents thread failure, and eases disassembly.
Precision Machining & Customization: Threads precision-cut using CNC lathes and custom tools for tight fit and interchangeability. Available in various specs (material, size, wall thickness) or fully customized.
Superior Material & Strength: Constructed from high-grade alloy steels (35CrMo, 42CrMo, 4137H) and heat-treated (quenched & tempered) for exceptional toughness and structural integrity under demanding drilling conditions.
Enhanced Durability & Reliability: Features surface phosphating and nitriding on precision threads, drastically reducing failures like gluing, breaking, expansion, and cracking while boosting wear resistance and ease of disassembly.
Precision Engineering & Fit: Threads machined with CNC lathes and custom forming cutters guarantee tight spacing, exact precision, and full interchangeability between components for seamless connections.
Comprehensive Customization: Offers extensive flexibility – available in various materials, lengths, diameters, and wall thicknesses, plus fully customized designs to meet specific customer requirements.
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