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API 5CT Oil Well Pipe - Durable Casing and Tubing
China
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
Product details
Technical Specifications of API 5CT Oil Well Pipe
| Property | Parameter | Description |
|---|---|---|
| Product Name | API 5CT Oil Well Pipe | OCTG casing and tubing for oil and gas wells |
| Standard Compliance | API 5CT / ISO 11960 | Primary international standard for well casing and tubing |
| Steel Grades | J55, K55, N80, L80, P110, C90, T95 | Multiple grades for varying downhole conditions |
| Manufacturing Process | Seamless / ERW | Hot-rolled seamless or electric resistance welded |
| Carbon (C) | ≤0.35% (J55/K55), ≤0.50% (P110) | Varies by grade per API 5CT specification |
| Manganese (Mn) | ≤1.65% | Enhances strength and hardenability |
| Sulfur (S) | ≤0.030% | Controlled for SSC resistance and toughness |
| Phosphorus (P) | ≤0.030% | Restricted for improved ductility |
| Yield Strength (J55) | 379 - 552 MPa | Minimum to maximum yield range per API 5CT |
| Yield Strength (N80) | 552 - 758 MPa | Higher strength for deeper wells |
| Yield Strength (P110) | 758 - 965 MPa | High-strength grade for demanding applications |
| OD Range | 2-3/8" - 20" (60.3 - 508 mm) | Standard casing and tubing sizes available |
| Wall Thickness | 3.18 - 16.13 mm | Per API 5CT dimensional tables |
| Length | R1 (4.88-7.62m), R2 (7.62-10.36m), R3 (10.36-14.63m) | Three standard range lengths |
| Thread Type | STC, LTC, BTC, Premium Connections | Short, long, buttress, and proprietary threads |
| Application | Oil & gas well casing, tubing, drilling operations | Onshore and offshore well construction |
| Certification | API 5CT, ISO 11960, EN 10204 3.1 | Mill test certificate with full traceability |
| Packaging | Bundled with steel strips, thread protectors, plastic caps | Standard export packaging for OCTG products |
| MOQ | 10 tons | Minimum order quantity |
API 5CT Oil Well Pipe - Durable Casing and Tubing
API 5CT oil well pipe is an essential tubular product engineered for downhole operations in the petroleum and natural gas industry. Manufactured in strict compliance with the American Petroleum Institute Specification 5CT (ISO 11960), these pipes serve as the structural backbone of well construction—providing wellbore integrity, pressure containment, and corrosion protection across demanding subsurface environments. Whether you require casing strings for well stabilization or tubing for hydrocarbon extraction, our mill-direct API 5CT oil well pipe delivers reliable performance at factory-competitive pricing for global operators, drilling contractors, and OCTG distributors.
What Is API 5CT Oil Well Pipe?
API 5CT oil well pipe refers to seamless or welded steel tubular goods—primarily casing and tubing—designed for use in oil and gas well drilling and completion. Governed by API Specification 5CT / ISO 11960:2020, this standard defines requirements for chemical composition, mechanical properties, thread profiles, and non-destructive testing to ensure safe, long-term service under high-pressure, high-temperature downhole conditions.
API 5CT Oil Well Pipe Technical Specifications
Our API 5CT casing and tubing products cover the full range of grades and dimensions specified by the standard. Below are key parameters:
| Property | Specification Details |
|---|---|
| Standard | API 5CT / ISO 11960:2020 |
| Steel Grades | J55, K55, N80-1, N80-Q, L80, C90, T95, P110, Q125 |
| Outer Diameter | Tubing: 1.050″–4.500″ (26.67–114.30 mm); Casing: 4.500″–20.000″ (114.30–508.00 mm) |
| Wall Thickness | Per API 5CT Table C.23 / E.23, tolerance +12.5% / −12.5% |
| Yield Strength (P110) | 758–965 MPa minimum to maximum |
| Yield Strength (J55) | 379–552 MPa minimum to maximum |
| Thread Types | STC (Short Thread Coupling), LTC (Long Thread Coupling), BTC (Buttress Thread), Premium Connections |
| Length Range | R1 (4.88–7.62 m), R2 (7.62–10.36 m), R3 (10.36–14.63 m) |
| Testing | Hydrostatic test, full-length ultrasonic inspection, drift test per API 5CT Section 10 |
Key Applications of API 5CT Casing and Tubing
- Surface Casing: Protects freshwater aquifers and provides structural support for the wellhead using grades J55 or K55.
- Intermediate Casing: Isolates unstable formations and abnormal pressure zones, commonly employing N80 or L80 grade pipe.
- Production Casing: Lines the productive interval to withstand reservoir pressures; P110 and Q125 grades find extensive application in deep and high-pressure wells.
- Production Tubing: Conveys hydrocarbons from the reservoir to the surface; L80 and C90 grades offer exceptional durability against corrosive H₂S and CO₂ environments.
Why Choose Our API 5CT Oil Well Pipe
- Full API Licensing: Manufactured under API Monogram Program per API Q1 quality management system.
- Comprehensive Grade Coverage: From J55 through Q125, including sour-service grades (L80, C90, T95) conforming to NACE MR0175 / ISO 15156.
- Rigorous Quality Control: Each pipe undergoes hydrostatic testing to 100% of API-specified pressures, full-body electromagnetic or ultrasonic inspection, and dimensional verification.
- Global Supply Capability: Readily accessible inventory with export packaging and third-party inspection coordination for projects worldwide.
Frequently Asked Questions
What is the minimum order quantity (MOQ)?
Our standard MOQ for API 5CT oil well pipe is 20 metric tons per grade and size combination. For less common specifications such as Q125 or premium connections, please contact us for project-specific arrangements.
Do you provide material test certificates?
Yes. Every shipment includes Mill Test Certificates (MTC) per EN 10204 Type 3.1, documenting chemical analysis, mechanical test results, hydrostatic test pressures, and NDE inspection records in full compliance with API 5CT requirements.
What is the typical delivery time?
Standard grades such as J55, N80, and P110 in common sizes are typically dispatched within 15–25 days from order confirmation. Sour-service grades and non-standard dimensions may require 30–45 days depending on mill scheduling.
Can you supply pipes with premium threaded connections?
Absolutely. Beyond standard STC, LTC, and BTC threads, we offer premium gas-tight connections engineered for high-torque, high-pressure, and deviated well applications—ensuring superior seal integrity under extreme downhole conditions.
Get a Competitive Quote for API 5CT Oil Well Pipe
Ready to secure top-tier OCTG products for your next drilling program? Contact our technical sales team today with your well design specifications—including grade, diameter, wall thickness, thread type, and quantity. We deliver value-driven pricing, rapid logistics, and dedicated project support from inquiry through final delivery.
Ratings & Reviews
Know your supplier
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
