Description
Our inventory covers the critical size range required for light-utility bores up to maxi-rig crossings: 51/2’βto 17 5/8”. We provide only certified Bit Thread engineered for maximum Rate of Penetration (ROP) and exceptional wear resistance across medium, hard, and extremely abrasive rock formations.
Mastering Hard Rock: IADC 537 to 737
The International Association of Drilling Contractors (IADC) code is the global standard for Bit Thread material. We specialize in the TCI series (IADC 5 through 7) essential for complex HDD rock drilling:
| IADC Code Range | Formation Hardness Profile | Key Technical Feature | Application Focus |
|---|---|---|---|
| IADC 537 | Medium-Hard Formations | Aggressive, chisel-shaped TCI inserts for rapid penetration. | Sandstone, Medium Shale, Soft Limestone, Dolomite. |
| IADC 617 / 637 | Hard Formations | Robust, blunt TCI inserts; increased spacing for greater rock crushing force. | Hard Limestone, Dolomite, Medium Granite. (The industry standard for general hard rock HDD). |
| IADC 737 | Very Hard & Abrasive Formations | Highly durable, spherical TCI inserts; maximum wear resistance. | Quartzite, Chert, Volcanic Rock, Basalt. |









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