High-Performance API 5CT Oilfield Tubing: Precision-Engineered for Harsh Well Conditions.
Designed to Optimize Production & Resist Downhole Stresses
API 5CT-compliant oilfield tubing pipes provide a corrosion-resistant conduit for oil, gas, and geothermal fluid transport. Available in 1.050″–5.5″ OD (26.7–139.7 mm) with wall thicknesses from 0.134″–0.508″ (3.4–12.9 mm), these seamless/welded tubes withstand pressures up to 15,000 psi (API TR 5C3) and temperatures from -50°F to 350°F.
Key Specifications & Certifications
- Standards: API 5CT, ISO 11960, NACE MR0175 (sour service).
- Material Grades: H40 (40 ksi yield) to Q125 (125 ksi yield).
- Connections: NUE, EUE, Premium (VAM®, Hydril, TMK).
- Length Ranges:
Range Length (ft) Common Applications 1 20–24 Shallow Vertical Wells 2 28–32 Offshore Gas Lift Systems 3 38–42 HPHT Carbon Capture Wells
Material Grades & Applications
1. Carbon Steel Tubing
| Grade | Yield Strength (ksi) | Key Features |
|---|---|---|
| J-55 | 55 | Cost-effective for shallow sweet wells |
| L-80 | 80 | SSC-resistant for H₂S ≤15 ppm |
| P-110 | 110 | High-pressure fracking (>10,000 psi) |
2. Corrosion-Resistant Alloys (CRA)
- 13Cr L-80: CO₂ corrosion resistance (30,000 ppm).
- Duplex 2205: Chloride stress cracking protection (150,000 ppm Cl⁻).
Connection Types: Sealing Integrity Matters
| Type | Pressure Rating | Key Advantage |
|---|---|---|
| NUE | 5,000 psi | Slim profile for tight clearances |
| EUE | 7,500 psi | Enhanced tensile strength |
| Premium | 15,000 psi | Gas-tight seal for sour service |
Thread Standards:
- API Round: 4–8 TPI (threads per inch).
- Buttress: 5 TPI for high torque (ISO 10422).
Quality Assurance & Testing
- NDT Inspections: UT (ASTM E317) + hydrostatic (API 5C5).
- Chemical Composition Control:
- Sulfur (S): ≤0.015%
- Phosphorus (P): ≤0.030%
- Dimensional Tolerances:
- OD: ±0.5% | Wall Thickness: ±10%
Applications by Industry
- Oil & Gas:
- Hydraulic Fracturing: P-110 grade for 12,000 psi slurry.
- Gas Lift Systems: EUE tubing with Hydril CSF™ threads.
- Geothermal:
- 13Cr L-80 tubing for 300°F brine (pH 3–10).
- CCUS (Carbon Capture):
- Q125 tubing for supercritical CO2 injection.
Performance Comparison
| Grade | Max Temp (°F) | H₂S Tolerance | Cost per ft |
|---|---|---|---|
| J55 | 250 | Not Rated | $8–12 |
| L80 | 350 | ≤15 ppm | $18–25 |
| P110 | 300 | ≤5 ppm | $30–40 |
Logical Connectors:
- Contrast: While NUE is economical, Premium threads offer superior sealing.
- Example: For instance, Duplex 2205 is used in North Sea wells.
- Cause-Effect: Tighter wall thickness control reduces failure rates by 22%.
Packing And Delivery
