Leak-Tight OCTG Tubing for Reliable Production Performance
Production tubing conveys hydrocarbons from the reservoir to the surface inside the production casing. Our API 5CT OCTG tubing is manufactured from seamless steel with precise dimensional control and machined threads to ensure leak-tight performance. Available in grades J55, N80, L80, and P110 with NUE, EUE, and premium gas-tight connections, it delivers high tensile strength, corrosion resistance to H2S and CO2, and dependable integrity for long-term well service.
Manufactured to API 5CT & ISO 11960 standards for reliable oil and gas production service.
High tensile and pressure capacity ensure tubing integrity during production.
Available with NUE, EUE, and premium gas-tight connections for different well conditions.
Each joint fully inspected by hydrostatic, NDT, and thread gauge tests.
API 5CT OCTG TUBING — Leak-Tight Production & Long-Term Integrity
- High tensile capacity for self-supporting weight and dynamic production loads.
- Pressure integrity ensures safety under high wellhead and flowing pressures.
- Corrosion-resistant grades (e.g., L80-13Cr) suitable for sour service environments.
- Precision threads and stable torque-turn make-up minimize leakage risk.
- Field-ready delivery with couplings fitted and thread protectors installed.
Description
Production tubing is the pipe string that carries hydrocarbons to surface inside the production casing. As the final in-well barrier, tubing integrity is critical to prevent fluid release to the environment. It must sustain its own weight, any attached downhole equipment, and dynamic loads during production, requiring adequate tensile and pressure performance.
Joints are decisive to leak-tight reliability. We supply standard EUE (higher joint strength) and NUE, plus premium gas-tight connections for high-pressure gas wells. Each joint is hydrostatically tested and examined by UT/MT/EMI with dimensional and thread gauging; lengths R1/R2 are delivered field-ready with couplings installed and plastic thread protectors.
- Leak-tight production with stable torque-turn make-up.
- Adequate tensile, burst, and collapse for long and deviated wells.
- Sour-service options (e.g., 13Cr) for H₂S/CO₂ environments.
- Precision machining and gauging for thread concentricity and fit.
- Full traceability and inspection records for quality assurance.
| Product Name | API 5CT OCTG Tubing Pipe |
|---|---|
| Outside Diameter | 2 3/8"–4 1/2" (60.3–114.3 mm) (Extended availability per API 5CT: 1.9"–4 1/2") |
| Length | R1 (6.10–7.32 m) · R2 (8.53–9.75 m) |
| Steel Grades | J55 · N80Q · L80-1 · L80-9Cr · L80-13Cr · C90 · P110 |
| Connections | NUE · EUE · Premium (gas-tight, on request) |
| Ends & Protection | Threaded & Coupled; thread compound and plastic protectors; couplings installed |
| Standard | Steel Grade |
|---|---|
| API SPEC 5CT / ISO 11960 | J55 |
| API SPEC 5CT / ISO 11960 | N80Q |
| API SPEC 5CT / ISO 11960 | L80-1 / L80-9Cr / L80-13Cr |
| API SPEC 5CT / ISO 11960 | C90 / P110 |
Specifications Sheet
Main Applications
API 5CT OCTG tubing pipes serve as the production conduit inside the casing string, carrying hydrocarbons safely from the reservoir to surface. They deliver leak-tight flow, withstand tensile/pressure cycling, and maintain integrity in deviated, horizontal, and sour-service wells across onshore and offshore fields.
Oil & Gas Production Wells
Primary production string providing a sealed flow path during production, completion, and workover operations.
High-Pressure / High-Temperature (HPHT)
Wells requiring stable torque-turn make-up and (where specified) premium gas-tight connections for pressure containment.
Shale & Directional / Horizontal
Extended-reach laterals needing higher tensile capacity, torque resistance, and consistent thread performance.
Offshore & Subsea Operations
Critical sealability and corrosion control to support long service life under harsh marine operating conditions.
Artificial Lift & Workover
Compatible with ESP/rod-lift and periodic interventions where reliable joints and leak-tight sealing are essential.
Advantages
- Leak-Tight Performance: NUE/EUE and premium gas-tight options; stable torque-turn make-up reduces leakage risk.
- Strength & Pressure Window: Adequate tensile, burst, and collapse capacity for long or deviated wells.
- Corrosion Control: Material selections including 13Cr grades for CO₂/H₂S (sour-service) environments.
- Dimensional Precision: Machined and gauged threads for concentric fit and repeatable make-up.
- Quality & Traceability: Hydrostatic, NDT, dimensional and thread inspections with full heat/lot records.
Packing & Transportation
OCTG tubing is packed to preserve thread and surface integrity from mill to well site, with couplings installed, doped, and protected for export handling.
- Bundled / Frame Packing: Steel straps or wooden frames with protective pads; plastic thread protectors and coupling guards fitted.
- Container Shipping: Suitable for R1 and selected cut lengths (e.g., ≤≈6 m for 20′; ≤≈12 m for 40′ HC), depending on project logistics.
- Breakbulk / Bulk Vessel: Recommended for higher volumes; wooden saddles with layered wrapping, tally and labeling per shipment lot.