4 -1/2 API Standard Tubing

4 -1/2 API Standard Tubing is widely used in wells requiring higher flow rates and mechanical strength than conventional production tubing. Its larger outer diameter improves production efficiency while maintaining reliable resistance to internal pressure, crushing, and tensile strength.

Manufactured to API 5CT specifications, this tubing is suitable for both onshore and offshore oilfields and is compatible with standard API fittings, packers, safety valves, and ESP completion equipment. Appropriate steel grades, wall thicknesses, and thread types can be selected based on well depth, production pressure, and corrosive environment.

Technical Specifications

Steel Grade Selection

Different well environments require different tubing grades.

Rather than choosing the highest grade, selecting tubing according to actual well conditions helps reduce unnecessary project costs while ensuring operational safety.

API Tubing Parameter Comparison Table

The table below compares core parameters of 2 7/8", 3 1/2" and 4 -1/2 API Standard Tubing, helping you select suitable products for different well conditions.

Typical Applications

4 -1/2 API Standard Tubing is commonly used in:
Deep oil wells
Ultra-deep gas wells
High-pressure production wells
Water injection wells
Gas injection wells
ESP completion systems
Horizontal wells
Directional wells
Heavy oil production
Offshore drilling projects

Manufacturing Process

All pipe fittings are manufactured using a standardized process.
Raw material inspection → Hot rolling → Heat treatment → Straightening → Threading → Dimensional inspection → Hydrostatic testing → Ultrasonic testing → Drift testing → Thread protection → Packaging and transportation

Packaging and Delivery

Depending on the mode of transport and project requirements, the following packaging options are available for pipes:
Threaded protective sleeves
Steel strapping
Waterproof packaging
Export wooden supports
Container loading
Bulk carrier shipping
Customized export packaging is available for long-haul international transport.

FAQ

Which tubing grade should I choose?

The appropriate grade depends on well depth, pressure, temperature and corrosion conditions. N80 and P110 are commonly selected for deep wells, while L80 is suitable for mildly corrosive environments.

What is the difference between EUE and NUE threads?

EUE threads use an external upset end for improved connection strength, while NUE threads have a non-upset design with a larger internal diameter. The selection depends on the completion design and connection requirements.

Can tubing be supplied with couplings installed?

Yes. Tubing can be delivered with couplings pre-installed or supplied separately based on project requirements.

Are third-party inspections available?

Yes. SGS, BV, DNV and other independent inspection services can be arranged before shipment upon request.

What documents are provided?

Typical documentation includes:
Mill Test Certificate (MTC)
API 5CT inspection report
Hydrostatic test report
Mechanical property report
Dimensional inspection report
Packing list
Commercial invoice

Why choose to partner with AOTE?

AOTE pumps not only provides standard tubing, but also focuses on providing comprehensive support throughout the entire procurement process—from tubing selection and technical consultation to manufacturing, inspection, and export logistics.

Our strengths include:
API 5CT compliant manufacturing
A wide selection of steel grades and thread types
Stable capacity for large-volume orders
Flexible customization to meet project requirements
Comprehensive inspection and traceable quality records
Extensive export experience serving global oilfield contractors and distributors
Technical support for tubing selection and project matching