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Threaded Connections
BEN-EUI-PR™
Integral, Upset, Semi Premium, Injection String, Production Tubing, Special Clearance, Coatable
The BEN‑EUI‑PR is Benoit®’s semi‑premium tubing connection engineered as a high‑performance replacement for API EUE 8RD, with design modifications for the application of Internal Plastic Coatings (IPC). The integral joint design eliminates the coupling and J‑area complications, and a precision‑machined internal groove accommodates protective rings used in IPC installations, ensuring proper make‑up and maintaining coating integrity across the connection. With smooth OD and ID transitions and a consistent internal diameter, the BEN‑EUI‑PR is ideally suited for injection, coated service and other corrosion‑sensitive operations
Performance & Sizes
| Size range | 2.375″ – 4.500″ |
| Tension | 100 % |
| Compression | 60 % – 70 % |
Testing Performed
- API RP 5C5 / ISO 13679 CAL II Modified
- Frac Cycle
- Sealibility
- Limit Load
- Finite Element Analysis
- Field Proven
Key Features
- Flush inside diameter enables easy coating application
- Optimized groove & coating assembly that does not sacrifice tension or internal pressure
- Slimmer connection O.D. than an API coupling
- Integral connection design reduces leak paths compared to API & eliminates coupling based running issues
- Dual shoulders provide smooth O.D. and I.D. for consistent running operations with no chance of getting stuck
- Low interference thread form allows for multiple make‑and‑breaks without galling
- Flush inside diameter with mating internal shoulders reduces turbulence & eliminates “J‑area” along with its associated corrosion, abrasion and erosion tendencies