API 5CT Casing Pipe
Our mill manufactures premium, API 5CT-certified seamless casing pipes engineered for high-pressure downhole drilling environments, oilfield structural stabilization, and critical gas extraction networks. We guarantee precise drift alignment, high collapse resistance ratings, verified thread integrity tolerances, and superior yield strength boundaries under immediate [2-Hour Rapid Quote] mill terms.
Terrified of downhole structural collapse or expensive cross-threading delays while your critical drilling project deadline closes in? Eliminate casing failures and secure your mill-verified testing certificates right now.
PRODUCT DETAILS
Premium API 5CT Casing Pipe Three-Standard Cross Matrix
| American Standard (API 5CT / ASTM) | European Standard (EN 10210 / ISO) | Japanese Standard (JIS G3445) | Min Yield Strength (Rpa) | Min Tensile Strength (Rm) |
|---|---|---|---|---|
| API 5CT J55 / K55 | ISO 11960 L55 | JIS G3445 STKM19 | 379 MPa | 517 MPa |
| API 5CT N80-1 / N80-Q | ISO 11960 N80 | JIS G3445 STKM22 | 552 MPa | 689 MPa |
| API 5CT P110 | ISO 11960 P110 | JIS G3445 STKM24 | 758 MPa | 862 MPa |
Technical QA/QC Verification
• 100% Traceable API MTC Records: Every shipment is backed by verified EN 10204 3.1 Mill Test Certificates (MTC) outlining hydrostatic burst testing pressures, hardness profiles, and magnetic particle inspection (MPI) data. Full inspection access for SGS, BV, or Intertek is fully integrated.
• Capital Security Guarantee: We eliminate international transactional exposure completely by supporting major industrial casing procurement arrangements via 100% Irrevocable Letters of Credit (L/C) at sight.
Anti-Rust Packaging & Ocean Logistics
• Fortified Heavy-Load Ocean Bundling: Hexagonal bundles are bound securely using high-tensile steel bands with heavy rubber lifting slings to avoid metal-to-metal chafing, engineered for maximum ocean freight weight distribution safety.
• Extended Port Demurrage Allocation: Our logistics coordinators secure 14 to 21 days of complimentary container or breakbulk demurrage at your destination port to ease custom clearance operations and inland dispatch steps.
Casing is used for lining the complete borehole which has been dug into the ground to procure oil. Similar to the drill pipe, the oil well casing pipe is also subjected to axial tension, therefore they are required to be made from high-quality strong steel material. OCTG casing is large diameter pipe which are held in place in the borehole using cement.
The diameters of OCTG casing pipe range from 4.5″ to 36″. The well-cemented pipe acts as the structural component of the well and offer hole integrity. They prevent the well from collapsing when the drilling process is on. Good quality, well cemented casing can stay in place for the whole life of the well.
The oil well casing pipe are further divided into:
Conductor Casing – Conductor casing is the first boundary between the surface and the subsurface. It helps prevention of well collapse; it keeps away the groundwater and most importantly provides structural support. Conductor casing is installed in the ground by either drilling it or hammering it down. They are available in sizes ranging from 18″ to 36″.
Surface Casing – The purpose of Surface casing is primarily environmental and to ensure safety. It helps in separating the freshwater zones, offering protection from blowout and supporting the wellhead and blow out prevention equipment. Therefore surface casings are required to maintain very high safety standards. They are responsible for supporting the next casing in line. They may vary in size depending on their purpose, but the most common size of surface casing is 13 3/8”.
Intermediate Casing: Intermediate casing is not always required in all types of oil and gas production. If used, they are placed between the surface and the production casing. They are available in sizes ranging from 13 3/8” to 16”.
Production Casing – Production casing help provide structural integrity and pressure control of the hydrocarbon-bearing sections mainly during the production of oil.
Production Liner – Production liners can be suspended from the production casing or one of the previous casings. They help in reducing the cost significantly as the liner is not required to run through the full depth of the well. Liners can be pre-perforated to help save time and cost.
More casing pipes and their colors
Specification
API 5CT Well Casing Length:
| Product | Range 1 (m) | Range 2 (m) | Range 3 (m) |
|---|---|---|---|
| API 5CT Casing | 4.88~7.62 | 7.62~10.36 | 10.36~14.63 |
Dimension
| Labels | OD (mm) | WT (mm) | J55/K55 | N80 | L80 | C90/T95 | P110 | Q125 | |
|---|---|---|---|---|---|---|---|---|---|
| 4 1/2 | 9.5 | 114.3 | 5.21 | PS | – | – | – | – | – |
| 10.5 | 114.3 | 5.69 | PSB | – | – | – | – | – | |
Packing and shipping
Our company has passed ISO9001 quality management system certification, Our Mill product with CE/EN10204 / ASTM/Classification society certificate/CASO/BIS etc certificate.All the customers give good appreciation to our products.We are glad to be your good partner.
Application Areas
Steel is widely used in steel structure workshops, bridge frames, main structures of high-rise buildings, and infrastructure construction (such as highways, oil and gas pipelines). Its high strength properties ensure load-bearing stability and seismic performance. In ship manufacturing, steel is used to build hull structures, decks, and internal components. Hot-rolled coils rely on their load-bearing capacity to adapt to harsh environments.
Factory workshop
With a commitment to excellence, innovation, and sustainability, the company has established itself as a trusted partner in the international steel industry.After nearly two decades of relentless endeavour, our client base now spans over 110 countries and regions across Europe, the Middle East, South America, and Southeast Asia.
Free Downhole Casing Blueprint Audit & Structural Yield String Optimization Analysis
Submitting field development blueprints for oilfield drilling, geothermal wells, or complex downhole pipeline installations? Upload your exact casing depth requirements, wall thickness fields, thread connection criteria, or technical Bill of Materials (BOM) schematics below. Our engineering team will run a calculation model to optimize coupling compatibility and maximize your project margins.
