Spiral Welded Casing Pipe for Oil And Gas
For demanding oil and gas well construction projects, selecting the right casing is paramount for structural integrity, longevity, and operational safety. Our premium Spiral Welded Casing Pipe offers a robust and reliable solution engineered specifically for these challenging environments. Utilizing the spiral submerged arc welding (SSAW) process, we manufacture high-strength, large-diameter pipes ideal for surface, intermediate, and production casing strings. This advanced manufacturing technique ensures superior dimensional accuracy and uniform wall thickness, resulting in exceptional collapse resistance and pressure containment capabilities. Our production adheres to stringent international standards, including API 5CT specifications, ensuring consistent performance under high pressures and corrosive conditions. We source high-grade steel to meet various grades such as J55, K55, N80, L80, and P110, providing optimal material properties for specific wellbore conditions. The spiral weld design inherently offers excellent resistance to bending stresses, making it suitable for directional and horizontal drilling applications. Furthermore, our extensive quality control protocols, from raw material inspection to non-destructive testing (NDT) of the finished weld, guarantee a product you can depend on for the life of your well. Our expertise extends to supplying related large-diameter and specialized spiral welded products, such as API 5L Large Diameter Spiral Pipe for transmission lines, ASTM A252 Spiral Piling Pipe for foundational support, AWWA C200 Spiral Welded Steel Pipe for water infrastructure, and Large Diameter Spiral Pipe for Dredging applications.
The technical specifications of our Spiral Welded Casing Pipe are designed to meet the rigorous demands of modern hydrocarbon extraction. Below are the detailed product parameters that define our offering.
Key Manufacturing Standards & Materials
- Standard Compliance: Manufactured in accordance with API 5CT, ISO 11960, and can be produced to other international standards upon request.
- Steel Grades: Available in a comprehensive range including but not limited to: J55, K55, N80 (Type 1 & Q), L80 (Type 1, 9Cr, 13Cr), C90, T95, and P110.
- Welding Process: Spiral Submerged Arc Welding (SSAW) with dual or multi-wire internal and external welding for deep penetration and high weld integrity.
- End Finish: Plain end, beveled end, or threaded and coupled (T&C) as per API 5B specifications.
Detailed Dimensional & Mechanical Specifications
| Parameter | Specification Range | Notes |
|---|---|---|
| Outside Diameter (OD) | 406 mm (16") to 2540 mm (100") | Custom diameters beyond this range can be discussed. |
| Wall Thickness | 6.0 mm to 25.4 mm (0.237" to 1.000") | Thickness is precisely controlled to ensure consistency. |
| Length | 6 meters to 18 meters (or as per agreement) | Standard random lengths or specified fixed lengths. |
| Yield Strength (min) | Varies by grade: e.g., 379 MPa (J55) to 758 MPa (P110) | Meets or exceeds API minimum requirements. |
| Tensile Strength (min) | Varies by grade: e.g., 517 MPa (J55) to 965 MPa (P110) | Full traceability of mechanical properties. |
| Hydrostatic Test Pressure | As per API 5CT requirements or client specification. | Every length is pressure tested to ensure leak-proof integrity. |
| Charpy V-Impact Test | Available for grades requiring low-temperature toughness. | Conducted at specified temperatures per project needs. |
Quality Assurance & Testing
- Non-Destructive Testing (NDT): 100% automated ultrasonic testing (AUT) of the weld seam and body. Supplementary X-ray inspection available.
- Dimensional Checks: Comprehensive verification of OD, wall thickness, length, straightness, and bevel angle.
- Surface Condition: Bare, varnish-coated, or external anti-corrosion coatings (FBE, 3LPE) can be applied.
- Marking & Documentation: Each pipe is clearly marked with standard, grade, size, heat number, and manufacturer info. Mill Test Certificates (MTC) provided.
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