API 5CT N80 Well Pipe Casing

What is API 5CT Grade N80 Well Pipe Casing?

API 5CT is the specification for casing and tubing used in the oil and gas industry. This standard specifies the technical delivery conditions for steel pipes (including casings, tubing, and pup joints), coupling stock, coupling materials, and accessory materials, and sets the requirements for three product specification levels (PSL-1, PSL-2, PSL-3). The N80 grade is an API 5CT well pipe casing, primarily used in oil wells with various end connections (such as non-thickened ends or externally thickened ends).

API 5CT Grade N80-Q casing is a medium-grade casing product widely used in oil and gas well drilling activities. The N80 grade includes two types: N80-1 and N80-Q, as well as other available materials such as 9Cr-80 and 13Cr-80.

Types and Characteristics of N80 Grade Well Pipe Casing

API 5CT N80 well pipe casing comes in two types: N80-1 and N80-Q. Both types have the same chemical composition and mechanical properties, differing only in their heat treatment methods. N80-1 casing is treated with normalizing and tempering, while N80-Q undergoes quenching and tempering. As a result, N80-Q has higher compressive and internal pressure strength compared to N80-1.

Applications of N80 Grade Well Pipe Casing

Oilfield pipes are primarily used for drilling oil and gas wells, as well as for the transportation of oil and gas. Well pipe casings provide support for the wellbore during drilling and after completion, ensuring the smooth operation of the drilling process and the overall functioning of the well. Well pipe casings are the lifeline for maintaining well operations. Due to varying geological conditions, the stress states underground are complex, with tensile, compressive, bending, and torsional stresses acting on the casing. This imposes high-quality requirements on the casing itself. Any damage to the casing could lead to reduced production or even abandonment of the entire well. N80 casings are widely used in construction, shipping, oil, metallurgy, aviation, food, paper, power, medical devices, boilers, chemical industries, heat exchangers, and metallurgy.

Connection Types, Ends, and Couplings for N80 Well Pipe Casing

The connection type for N80 well pipe casing typically refers to BTC, indicated by the BC symbol for trapezoidal threads; other types include short round threads and long round threads, marked as SC or LC symbols respectively. Octal also provides various types of premium connections and seal pipe connections. If required by customers, we can customize connection threads and joints.

Manufacturing Process of API 5CT N80 Well Pipe Casing

Like other grades of API 5CT, the manufacturing process includes seamless hot rolling and ERW welding. In most cases, casings are of seamless type.

Manufacturers and Supply Range for API 5CT N80 Well Pipe Casing

• Standard: API SPEC 5CT Casing Steel Pipe
• Grades: N80-1, N80-Q, L80, 9Cr-80, 13Cr-80
• Manufacturing Process: Seamless, ERW
• Outer Diameter: 5-1/2”, 6-5/8”, 7”, 7-5/8”, 7-3/4”, 8-5/8”, 9-5/8”, 10-3/4”, 11-3/4”, 13-3/8”, 16”, 18-5/8”, 20”
• Thickness: 14 LB/FT to 106.59 LB/FT, 0.244” to 0.875”
• Connection Threads: BTC, LTC, serrated (regular, special slope, or special gap), premium connection threads.
• Length: R2, R3, custom

At Baowi Steel, we provide high-quality API 5CT N80 oilfield pipes, including N80-Q and N80-1 types. Whether N80-Q or N80-1, both materials maintain consistency in chemical composition and mechanical properties. Through advanced heat treatment processes, N80-Q is subjected to quenching and tempering, offering higher internal pressure and compressive strength, suitable for more demanding operating environments.

Choose Baowi Steel for reliable and durable oilfield pipes that ensure the smooth progress of your drilling and extraction operations. Let us be your trusted partner in the oil and gas industry!

API 5CT N80 Casing and Tubing Color Code

API 5CT N80 well pipe casing Size Chart