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Threaded Connections
BTS®-8 FO FGL
Integral, Upset, Premium, Injection String, Production Tubing, Special Clearance, Coatable
The BTS®‑8 FO FGL is a gas‑tight, two‑step premium connection featuring a bored, full open (FO) connection ID and a precision‑machined ring groove to accommodate liner rings and flanges for Fiber Glass Liner (FGL) or Glass Reinforced Epoxy (GRE) systems. It maintains the sealing reliability and field‑proven performance of the BTS®‑8 while enabling the installation of corrosion‑resistant liner systems in demanding downhole environments
Performance & Sizes
| Size range | 2.375″ – 4.500″ |
| Tension | 86 % – 94 % |
| Compression | 53 % – 59 % |
Testing Performed
- API RP 5C5 / ISO 13679 CAL III Enhanced
- Sealibility
- Limit Load
- Thermal Cycles
- Field Proven
Key Features
- Flush inside diameter enables easy lining operations
- Optimized groove & flange assembly that does not sacrifice internal pressure and eliminates “J‑area” along with its associated corrosion, abrasion & erosion tendency
- Two‑step with internal & mid‑wall torque shoulders allows for deep stabbing, providing consistent field make‑up for reliable liner assembly compression
- Integral connection design reduces leak paths compared to API & eliminates coupling‑based running issues
- Non‑interference threadform nearly eliminates galling even after repeated make‑ups
- Metal‑to‑metal seal designed to be stronger than the pipe body & proven to be +100 % gas tight through deviated wells