Product Overview
API 5CT seamless casing pipe is the critical tubular component that ensures wellbore integrity in oil and gas operations. Manufactured in full compliance with the American Petroleum Institute Specification 5CT / ISO 11960, this seamless steel pipe is inserted into the wellbore and cemented in place to stabilize the well walls, prevent formation collapse, isolate pressure zones, and provide a reliable conduit for drilling fluid circulation and hydrocarbon production.
Key Advantages
1. Comprehensive Grade Coverage for All Well Conditions
Our product range covers all API 5CT steel grades, from shallow low-pressure service to ultra-deep high-pressure conditions:
| Grade | Min. Yield Strength (psi) | Typical Application |
|---|---|---|
| J55 | 55,000 | Shallow to medium-depth wells, general purpose |
| K55 | 55,000 | Same strength as J55, improved tensile properties |
| N80 | 80,000 | Medium-depth, moderate pressure – cost-effective |
| L80 | 80,000 | Sour service (H₂S environments) |
| P110 | 110,000 | Deep wells, HPHT conditions |
2. Full Range of Sizes and Dimensions
Outer Diameter: 2" to 20" (60.3mm – 508mm), with wall thickness optimized per grade and size.
3. Multiple Connection Types
| Type | Full Name | Features |
|---|---|---|
| STC | Short Round Thread Casing | Standard connection for conventional service |
| LTC | Long Round Thread Casing | Enhanced connection strength for medium-depth wells |
| BTC | Buttress Thread Casing | Superior tensile and torque performance for deep wells |
| Premium Connections | Gas-tight threads | Customizable with VAM, Hydril, Tenaris series, etc., for high-pressure gas wells and sour service |
4. Rigorous Quality Assurance
Our products are manufactured and tested per API 5CT and API 5B standards, undergoing:
● Chemical composition analysis
● Mechanical property testing
● Hydrostatic testing
● Non-destructive testing (NDT)
Packaging & Delivery
Standard seaworthy export packaging with plastic or metal thread protectors on both ends
External coating with black anti-rust varnish; transparent coating available upon request
Optional internal plastic coating or sleeves
Clear marking per API 5CT specifications
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