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Threaded Connections
BEN-SF™
Integral, Semi Flush Joint, Premium, Refrac Liner, Special Clearance
The BEN‑SF is a semi‑flush connection designed for unconventional wells, including refrac liners and slim‑hole casing operations. It features a metal‑to‑metal seal, mid‑connection torque shoulder and precision‑machined run‑in/run‑out threads to deliver strength, gas‑tight integrity and consistent make‑up. Its galling resistance supports trouble‑free multiple make‑and‑breaks.
Performance & Sizes
| Size range | 3.500″ – 4.000″ |
| Tension efficiency | 86 % |
| Compression efficiency | 86 % |
Testing Performed
- API RP 5C5 / ISO 13679 CAL II Modified
- Frac Cycle
- Sealibility
- Limit Load
- Finite Element Analysis
- Field Proven
Key Features
- Two‑step tapered design offers maximum tension and compression performance.
- Slim connection outside diameter for tight‑clearance wells.
- Center metal‑to‑metal seal optimized and proven 100 % gas tight through deviated wells.
- Center shoulder provides consistent running operations with a positive stop.
- Flush inside diameter with mating internal shoulders minimizes turbulence.
- Low interference threadform enables multiple make‑and‑breaks without galling.