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OCTG Casing and Tubing Pipes

Oil country tubular goods (OCTG) is a family of seamless rolled products consisting of drill pipe, casing and tubing subjected to loading conditions according to their specific application.
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  • API 5CT J55 K55 N80

  • YKL

What is OCTG? 

It includes Drill Pipe, Steel Casing Pipe and Tubing


OCTG is the abbreviation of Oil Country Tubular Goods, it mainly refers to the piping products that applied in the oil and gas production (drilling activities). OCTG pipe normally is manufactured based on API or related standard specifications. It also could be taken as a collective name of Drill pipe, Steel Casing Pipe and Tubing pipe, Couplings, Connections and Accessories, used in petroleum industries that onshore and offshore.

According to the API (American Petroleum Institute) standardized specifications, through the control on the chemical properties and adopts different heat treatment, OCTG pipe is classified into different performances material more than ten grades.

Types of Oil Country Tubular Goods (OCTG pipes)

There are three main types of Oil Country Tubular Goods, which includes Drill pipe, Casing pipe and Tubing pipe.

For to get you a better understanding, we will explain the meaning of each of the three to help you understand their work and their use.

Drill pipe is a heavy, seamless tube that rotates the drill bit and circulates drilling fluid. It allows the drilling fluid to be pumped through the bit and back up the annulus. The pipe is subject to axial tension, extremely high torque and high internal pressure. That is why the pipe is extremely strong and vital in OCTG endeavour.

Drill Pipe normally mean for the Durable steel pipe used in drilling, standards in API 5DP and API SPEC 7-1.

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