API 5CT J55/N80 EUE/NUE Seamless Steel Tubing Pipe for Oil Wells - China Suppliers & Factory
Detailed Description of Tubing Pipe
Production tubing is the pipe string which conveys hydrocarbons to surface. It is set in the final casing string, along with the production casing, is the last barrier preventing produced fluids from entering the environment, which is why the integrity of the tubing is critical. The tubing needs to support its weight, any down hole equipment, and dynamic loads while producing, which means it must have adequate tensile strength. The joints (couplings) are the most important part of the tubing string. We stock standard API connections like EUE (External Upset End), which provides higher joint strength, and NUE (Non-Upset End), and specific premium gas-tight connections for high-pressure gas wells.
Key Parameters for OCTG Tubing Pipe
| Parameter | Details |
|---|---|
| Manufacturing Process | Seamless (SMLS) |
| Executive Standard | API SPEC 5CT, ISO 11960 |
| Grades | J55, N80Q, L80-1, L80-9Cr, L80-13Cr, C90, P110 |
| Outer Diameter (OD) | 1.9" - 4 1/2" |
| Wall Thickness | As per API 5CT standard, varies with OD and weight (lbs/ft) |
| Length | R1 (6.10-7.32m), R2 (8.53-9.75m) |
| End Finish / Connection | NUE (Non-upset), EUE (External upset), and premium connections |
| Inspection | Hydrostatic Test, NDT, Dimensional Inspection, Tensile Tests, Thread Inspection |
Frequently Asked Questions (FAQ)
Q: What is the primary function of production tubing?
Production tubing is the pipe string that conveys hydrocarbons to the surface. Placed within the final casing string, it serves as the critical final barrier preventing produced fluids from entering the surrounding environment.
Q: Which standards and manufacturing processes apply to OCTG tubing pipes?
OCTG tubing pipes are manufactured using the Seamless (SMLS) process and comply with the API SPEC 5CT and ISO 11960 executive standards.
Q: What types of connections are available for the tubing string?
We offer standard API connections including EUE (External Upset End) for higher joint strength and NUE (Non-Upset End), as well as specialized premium gas-tight connections for high-pressure gas wells.
Q: What steel grades and sizes are available for OCTG tubing?
Our tubing is available in grades J55, N80Q, L80-1, L80-9Cr, L80-13Cr, C90, and P110, with outer diameters (OD) ranging from 1.9" to 4 1/2".
Q: How are these tubing pipes inspected for quality assurance?
Each tubing pipe undergoes rigorous testing, including Hydrostatic Tests, NDT (Non-Destructive Testing), Dimensional Inspections, Tensile Tests, and Thread Inspections to ensure structural and connection integrity.