API 5CT Tubing Pipe
API 5CT Tubing Pipe is a high-performance steel tubing product designed for oil and gas well production and completion systems. Installed inside the well, it provides a reliable flow path for transporting oil, gas and other produced fluids to the surface while withstanding pressure, mechanical loads and demanding downhole conditions.
Manufactured in accordance with API 5CT, API 5CT Tubing is available in commonly used grades including J55, K55, N80, L80, C90, T95, P110 and Q125. Different steel grades provide different levels of strength, toughness and service performance, allowing the tubing to be selected for conventional production wells as well as deeper and more demanding applications.
Product Specifications
| Item | Details |
| Standard | API 5CT |
| Product Type | Tubing Pipe |
| Available Grades | J55, K55, N80, L80, P110 |
| Manufacturing Process |
Seamless / ERW |
| Tubing Size | Commonly 1.050"–4½" |
| OD Range | Approx. 26.67–114.30 mm |
| End Finish | Plain End / Threaded & Coupled |
| Trade Terms | EXW,FOB,CIF,CFR,DAP |
Chemical Composition
| Grade | C (%) | Si (%) | Mn (%) | P max (%) | S max (%) | Cr (%) | Ni (%) | Cu (%) | Mo (%) | V (%) |
|---|---|---|---|---|---|---|---|---|---|---|
| J55 | 0.34–0.39 | 0.20–0.35 | 1.25–1.50 | 0.020 | 0.015 | ≤0.15 | ≤0.20 | ≤0.20 | - | - |
| K55 | 0.34–0.39 | 0.20–0.35 | 1.25–1.50 | 0.020 | 0.015 | ≤0.15 | ≤0.20 | ≤0.20 | - | - |
| N80 | 0.34–0.38 | 0.20–0.35 | 1.45–1.70 | 0.020 | 0.015 | ≤0.15 | - | - | - | 0.11–0.16 |
| L80 | 0.15–0.22 | ≤1.00 | 0.25–1.00 | 0.020 | 0.010 | 12.0–14.0* | ≤0.20 | ≤0.20 | - | - |
| P110 | 0.26–0.35 | 0.17–0.37 | 0.40–0.70 | 0.020 | 0.010 | 0.80–1.10 | ≤0.20 | ≤0.20 | 0.15–0.25 | ≤0.08 |
Typical Mechanical & Chemical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Carbon (%) |
| J55 | 379 - 552 | ≥ 517 | ≤ 0.35 |
| K55 | 379 - 552 | ≥ 655 | ≤ 0.35 |
| N80 | 552 - 758 | ≥ 689 | ≤ 0.43 |
| L80 | 552 - 655 | ≥ 655 | Controlled by Grade |
| P110 | 758 - 965 | ≥ 862 | Controlled by Grade |
What Oilfield Buyers Usually Care About
Strong load-bearing capability
Suitable for the mechanical demands encountered during tubing installation and well production.
Good toughness and durability
Provides reliable service under continuous pressure and mechanical loading.
Reliable threaded connections
NU, EU and IJ configurations provide different connection solutions for oilfield applications.
Suitable for demanding well environments
Higher-grade tubing can be selected for deeper wells, higher loads and more severe operating conditions.
Proven oilfield application
Widely used in oil and gas production and well-completion systems.
Typical Applications
API 5CT tubing pipe are used throughout the lifecycle of oil and gas wells-from drilling and completion to long-term production. The pipe must withstand extreme downhole environments, including high pressure, corrosive fluids, and mechanical stresses from both the formation and the production process.
Common applications include:
- Oil Well Casing
- Oil Well Tubing
- Onshore Drilling Projects
- Offshore Drilling Platforms
- Natural Gas Wells
- Well Completion Systems
- Production Wells
- Energy Development Projects
FAQ
Q: What is the difference between API 5CT and API 5L?
A: API 5CT is used for casing and tubing inside oil and gas wells, while API 5L is used for transmission pipelines.
Q: Which API 5CT grade is most commonly used?
A: J55, N80, and P110 are among the most frequently requested grades.
Q: Can threaded tubing be supplied?
A: Yes. BTC, LTC, STC, and other connection types are available.
Q: Do you provide API certificates?
A: Yes. API 5CT certification, MTC, and third-party inspection reports can be supplied upon request.
Q: Can you supply casing accessories?
A: Yes. Thread protectors, couplings, and related accessories can be supplied together with the pipe.
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