Threaded Connections
BEN-EUI-FO™
BEN-EUI-FO™ is a semi-premium alternative to API EUE 8RD with a full-open bore. It retains the BEN-EUI™ integral joint design, eliminating the coupling and J-area, simplifying supply logistics, and providing increased pressure, torque, and bending capacity for deviated and horizontal wells. The modified buttress thread form reduces radial stress. The connection is bored to match the nominal inside diameter (ID) of the tube body. The consistent bore also suits injection and coated-tubing applications, including internally plastic-coated (IPC) and fiberglass-lined tubing.
Performance & Sizes
| Size range | 2.375″ – 4.500″ |
| Tension | 100 % |
| Compression | 79 % – 86 % |
Testing Performed on BEN-EUI™
- API RP 5C5 / ISO 13679 CAL II Modified
- Frac Cycle
- Sealibility
- Limit Load
- Finite Element Analysis
- Field Proven
Key Features
- Full-open bore matches the nominal tube body ID
- Slimmer connection OD than an API coupling
- Integral connection design reduces leak paths compared to API alternatives & eliminates coupling‑based running issues
- Dual shoulders provide smooth OD & ID for consistent running operations with no chance of getting stuck
- Flush inside diameter with mating internal shoulders reduces turbulence & eliminates the “J‑area” along with its associated corrosion, erosion or abrasion tendency
- Low interference thread form reduces hoop stress & allows for multiple make‑and‑breaks without galling