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Threaded Connections

BEN-EUI™

Integral, Upset, Semi Premium, Production Tubing, Special Clearance

The BEN‑EUI is Benoit®’s semi‑premium tubing connection engineered as a high‑performance replacement for API EUE 8RD. Its integral joint design eliminates the coupling and J‑area complications and simplifies supply chain logistics while delivering increased pressure, torque and bending capacity for deviated and horizontal wells. A modified buttress thread form reduces radial stress, and the connection’s smooth OD and ID transitions make it ideal for jet pump or annular flow operations. With a consistent internal diameter, the BEN‑EUI is well‑suited for injection and coated applications, including IPC and fiberglass‑lined tubing

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Performance & Sizes

Size range2.375″ – 4.500″
Tension100 %
Compression79 % – 86 %

Testing Performed

  • API RP 5C5 / ISO 13679 CAL II Modified
  • Frac Cycle
  • Sealibility
  • Limit Load
  • Finite Element Analysis
  • Field Proven

Key Features

  • 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