OCTG tubing, or Oil Country Tubular Goods tubing, is a type of pipe specifically designed for use in the oil and gas industry. It serves as a crucial component in the production phase of oil and gas wells, allowing for the efficient flow of oil and gas from the well to the surface.

Tubing pipes typically adhere to the API 5CT standard, which is why they are often referred to as API 5CT Tubing.

Key Features of Tubing Pipe:

• Material: Tubing pipes are typically made from high-strength steel to withstand the demanding conditions of drilling operations, including high pressure and temperature.
• Applications: They are primarily used in the production of oil and gas, functioning as conduits for the extracted resources.
• Types: Tubing pipes come in various grades and specifications, tailored to meet the specific requirements of different drilling environments.

Importance:

The tubing pipe is essential for ensuring the safety and efficiency of oil and gas extraction processes. Its design and material properties are optimized for the harsh conditions encountered in drilling operations, making it a vital element in the oil and gas industry.

Octal provides OCTG Tubing, API 5CT tubing with below grades:

API 5CT J55
API 5CT K55
API 5CT N80-1
API 5CT N80Q
API 5CT C90
API 5CT C95
API 5CT P110
API 5CT Q125

Ends Type of API 5CT tubing
NU Tubing pipe
EUE Tubing pipe
Premium Ends in API 5CT Tubing

Range of Sizes

Tubing range of Sizes: 1.05”, 1.315”, 1.66”, 1.9”, 2 3/8”, 3 1/2” and 4 1/2”
Ends Type: BTC, UN, EUE, Premium ends that could completely replace the tubing premium connection Tenaris, Hunting, TSH etc.
Length of the Tubing in API 5CT Spec: R2, R3

Types of Ends for API 5CT OCTG Tubing

API 5CT OCTG tubing comes with various types of ends, which are crucial for ensuring proper connections and functionality in oil and gas operations. The main types of ends for API 5CT OCTG tubing include:

1. Plain End (PE): This type of end is simply cut straight across without any additional features. It is often used in applications where the tubing will be welded or connected using other methods.
2. Threaded End: These ends are machined with specific threads that allow for easy connection to other tubing or equipment. The threading can vary based on the specific requirements of the application, and common thread types include:
   • EUE (External Upset End):  EUE tubing features a thicker wall at the ends, which provides additional strength and support compared to Non-Upset End (NUE) tubing. This design enhances the tubing’s ability to withstand high pressures and harsh conditions encountered during drilling and production operations.
   • NUE (Non-Upset End): NUE, or Non-Upset End, refers to a type of tubing end used in the oil and gas industry, particularly in API 5CT OCTG tubing. Unlike Upset Ends (EUE), which have a thicker wall at the ends to provide additional strength and support, NUE tubing has a uniform wall thickness throughout its length. This design allows for easier handling and installation, making it suitable for various applications in drilling and production operations.
3. Coupled End: This type involves the use of a coupling to connect two pieces of tubing. The coupling has threads on both ends, allowing for a secure connection between the tubing sections.
4. Special Ends: Depending on specific requirements, there may be custom or specialized ends designed for particular applications, such as those that require additional sealing or pressure resistance.

These different types of ends are designed to meet the diverse needs of drilling and production operations in the oil and gas industry, ensuring safe and efficient extraction processes.

API 5CT OCTG Tubing Data Sheet

Refers to the chemical composition, mechanical strength of YS (Yield Strength), TS (Tensile Strength), Elongation and hardness.

Chemical Composition of API 5CT Tubing Pipe

Please note:
a. The carbon content for L80 may be increased up to 0,50 % maximum if the product is oil-quenched.
b. The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the WT is less than 17,78 mm.
c. The carbon content for R95 may be increased up to 0,55 % maximum if the product is oil-quenched.
d. The molybdenum content for T95 Type 1 may be decreased to 0,15 % minimum if the WT is less than 17,78 mm.
e. For EW Grade P110, the phosphorus content shall be 0,020 % maximum and the sulfur content 0,010 % maximum.
NL = no limit. Elements shown shall be reported in product analysis.

Mechanical Properties of OCTG Tubing

Note:
a. In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method.
b. No hardness limits, but the maximum variation is controlled by manufacturer acc API 5CT.

OCTG Tubing dimensions and weight chart

Applications

OCTG Tubing in API 5CT mainly used to transport oil and gas well drilling and oil and gas. It includes oil drilling pipe, oil casing, pump tubing. Oil drill pipes are mainly used to connect drill collar and drill and pass drilling power. Oil casing is mainly used to support the borehole when drilling and after completion, to ensure that the conduct and completion of the drilling process after the normal operation of the entire oil wells. The pipeline mainly used in pumping oil and gas at the bottom transported to the ground.

Advantages from Octal

Octal is working with famous and professional API 5CT tubing manufacturers in China, committed to provide the high quality and best price of the OCTG tubing pipe, applied for the oil and gas services.