API 5CT Seamless Oil Well Casing Pipe 4.5-20 Inch Diameter J55-K55-N80-L80-P110 Steel Grades
High-performance seamless casing pipes for oil well drilling applications. API 5CT certified with diameters from 114.3mm to 508mm and multiple steel grades for different depth requirements. Features corrosion resistance, anti-collapse performance, and various thread options including BTC, LTC, and STC connections.
Place of Origin
China
Alloy steel or not
Alloy steel
Place of origin
China (mainland)
Packaging Details
Be bundled by steel strap
Model Number
4 1/2"-20"
Section shape
Round
Product Description
API 5CT Certified Seamless Oil Well Casing Pipe
Oil well casing pipe is a large-diameter seamless steel tube that is assembled and inserted into drilled borehole sections, typically secured in place with cement. These pipes provide structural integrity and prevent well collapse in various geological conditions.
Product Specifications
Available Sizes & Grades
| Size | Linear Mass (lb/ft) | Outside Diameter | Wall Thickness | Steel Grades |
|---|---|---|---|---|
| 4 1/2" - 20" | 9.5 - 133 | 114.3mm - 508mm | 5.21mm - 20.24mm | J55, K55, N80, L80, P110 |
Key Features
- Length range R3 (longest standard length)
- API 5CT certified seamless construction
- Available in multiple steel grades for different well depths
- Corrosion-resistant options for harsh environments
- Anti-collapse performance for complex geological conditions
- Thread types: BTC, LTC, STC
Mechanical Properties
| Steel Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| J55 | ≥517 | 379-552 | 0.5 |
| K55 | ≥655 | 379-552 | 0.5 |
| N80 | ≥689 | 552-758 | 0.5 |
| L80 | ≥655 | 552-655 | 0.5 |
| P110 | ≥862 | 758-965 | 0.6 |
Thread Options
Available with standard thread configurations including Buttress Thread (BTC), Long Thread (LTC), and Short Thread (STC) to meet various connection requirements.
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