Precision-engineered lock joints/drill pipe joints crafted from 35CrMo or 42CrMo alloy steel. Feature quenched/tempered heat treatment and phosphating/nitriding surface finishes on threads to prevent galling, breaking, and cracking. CNC-machined with custom cutters for tight spacing, flawless precision, and full interchangeability—ensuring wear-resistant, easy-disassembly performance in demanding drilling operations.
| External Diameter | Inside Diameter | Tool Joint Thread | Matching Drill Pipe | Joint Material | |
| mm | mm | Pitch | Taper | mm | |
| 57 | 22 | 6 | 1:5 | 42 | 40Cr |
| 65 | 28 | 6 | 1:5 | 50 | 35CrMo/42CrMo |
| 68 | 28 | 6 | 1:5 | 50 | 35CrMo/42CrMo |
| 75 | 38 | 6 | 1:5 | 60 | 35CrMo/42CrMo |
| 78 | 38 | 6 | 1:5 | 60 | 35CrMo/42CrMo |
| 86 | 44.5 | 4 | 1:6 | 60 | 35CrMo/42CrMo |
| 105 | 50.8 | 4 | 1:6 | 73 | 35CrMo/42CrMo |
| 121 | 68 | 4 | 1:6 | 89 | 35CrMo/42CrMo |
| 127 | 65 | 4 | 1:6 | 89 | 35CrMo/42CrMo |
| 140 | 57 | 4 | 1:6 | 102 | 35CrMo/42CrMo |
| 152 | 83 | 4 | 1:6 | 114 | 35CrMo/42CrMo |
| 168 | 95 | 4 | 1:6 | 127 | 35CrMo/42CrMo |
| 178 | 95 | 4 | 1:6 | 140 | 35CrMo/42CrMo |
High-Performance Material & Treatmen: Made of 35CrMo or 42CrMo alloy steel, heat-treated (quenching/tempering), with phosphating/nitriding on threads. Prevents thread gluing, breaking, and cracking while boosting wear resistance and disassembly ease.
Precision-Engineered Threads: Threads machined via CNC lathes and custom cutters ensure tight spacing, exact precision, and full interchangeability between drill pipes and joints for reliable, seamless connections.
High-Strength Material Construction: Made from premium alloy steels (35CrMo or 42CrMo), ensuring robust structural integrity and reliability under demanding drilling conditions.
Advanced Surface Treatment for Durability: Threads undergo phosphating and nitriding post-finishing, significantly reducing failures (galling, breaking, expansion, cracking) while enhancing wear resistance and disassembly ease.
Precision Thread Machining: CNC lathes and custom forming cutters guarantee tight thread spacing, exceptional precision, and full interchangeability between drill pipes and joints for seamless connections.
Optimized Heat Treatment Process: Quenching and tempering after rough machining provide superior toughness and fatigue resistance, directly contributing to joint longevity and operational safety.
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