Hughes H-90 Special Laydown Threading Inserts – 22U / 27U Series
Ideal for: Heavy Drill Pipe, Tool Joints, Oil & Gas Exploration.
- Product Standard: Hughes H-90 Special Threading laydown threading inserts.
- Specialized Profile: Engineered specifically for the Hughes H-90 drill pipe connection standard.
- Heavy Duty Capacity: Large U-Type format handles the demanding 3.5 TPI and 3.0 TPI coarse pitches.
- Connection Range: Covers connection sizes from 2-3/8″ up to 8-5/8″.
- Stability: Large 1/2″ (22U) and 5/8″ (27U) I.C. sizes provide superior rigidity compared to standard 16er threading inserts.
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Versatility: Premium carbide threading inserts for lathe operations, available in External and Internal profiles.
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Product Overview
Manufacture reliable drill stem connections with our Hughes H-90 Special laydown threading inserts. Designed for the oil and gas industry, these tools produce the proprietary H-90 thread form used on heavy-duty drill pipes and tool joints.
Featuring a robust U-Type design, these carbide threading inserts are built to withstand the extreme cutting forces of machining coarse 3 TPI and 3.5 TPI threads on heat-treated alloy steel. The specialized geometry ensures the thread profile meets strict connection specifications for torque transmission and sealing.
Key Features & Benefits
- Drill Pipe Specialist: Specifically tailored for H-90 connections, ensuring proper makeup and joint strength in downhole environments.
- U-Type Stability: The large insert size (up to 5/8″ I.C.) eliminates chatter during deep cuts, a capability beyond standard 16er threading inserts.
- Connection Coverage: Specific models designed for different pipe ranges, from smaller 2-3/8″ joints to massive 8-5/8″ connections.
- Optimized Grade: Tough carbide substrate resists chipping and wear during the interrupted cutting often found in re-threading operations.
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System Options: Our range includes high-performance threading inserts for lathe setups, with standard right-hand and custom left hand thread insert options available for specialized tooling needs.
Hughes H-90 Special Laydown Threading Inserts Technical Specifications
| Type | I.C. | Pitch (TPI) | Model (Right-hand) | Application Size | L | X | Y |
|---|---|---|---|---|---|---|---|
| External | 1/2″ U | 3.5 | 22UER3.5H902 | 3 1/2″ ~ 6 5/8″ | 22 | 4.2 | 11 |
| External | 1/2″ U | 3.5 | 22UER3.5H903 | 7″ ~ 8 5/8″ | 22 | 4.2 | 11 |
| External | 5/8″ U | 3 | 27UER3H90 | 2 3/8″ ~ 3 1/2″ | 27 | 5.5 | 13.5 |
| Internal | 1/2″ U | 3.5 | 22UIR3.5H902 | 3 1/2″ ~ 6 5/8″ | 22 | 4.2 | 11 |
| Internal | 1/2″ U | 3.5 | 22UIR3.5H903 | 7″ ~ 8 5/8″ | 22 | 4.2 | 11 |
| Internal | 5/8″ U | 3 | 27UIR3H90SL | 2 3/8″ ~ 3 1/2″ | 27 | 5.5 | 13.5 |
Machining Guidelines
- Holder Compatibility: These are U-Type threading inserts. They require specialized U-Type tool holders (22U or 27U pocket size) and will not fit standard holders for 16er threading inserts.
- Model Selection: Pay close attention to the specific connection size range (e.g., H902 vs. H903) as the thread profile details may vary slightly for different pipe diameters.
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Machine Setup: Machining 3 TPI threads on hardened pipe joints requires a rigid laydown threading inserts setup and a machine with sufficient torque at low RPM.
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