Oil well pipe (OCTG pipe), also known as oil special pipe, is a kind of steel pipe specially used for oil and natural gas exploitation. Most of them are seamless pipes, but welded pipes also account for a considerable proportion.
Oil well pipe standard
Implementing API-5CT standard drill pipe is the pipe connecting the drilling motor and the drill bit during the drilling process. The outer diameter is generally 2-6.5 inches (50-165mm), and the length is generally between 5-14m. Casing serves as the structural wall or lining of oil/gas wells to prevent contamination of the well or surrounding groundwater and can be up to 26 inches in diameter. Casing accounts for more than three-quarters of oil-specific pipe shipments.
The working principle of oil well pipe
Drilling fluid flows through the drill string to the drill bit to cool the drill bit. At the same time, the drilled earth and rock debris and drilling fluid form mud, which is transported to the ground surface through the annulus (the gap between the casing and the drill string). Due to the harsh working environment, most drill strings are seamless pipes.
Characteristics of OCTG
1. Oil well pipe plays an important role in the petroleum industry:
① Oil well pipes are used in a large amount and cost a lot, so there is great potential for saving expenses and reducing costs.
② The mechanical and environmental behavior of oil well pipes has an important impact on the adoption of advanced technology and production increase in the petroleum industry.
③Oil country tubular goods have huge losses due to failure, and their safety, reliability and service life are of great importance to the petroleum industry
2. Basic characteristics of OCTG
Oil well pipe is not a general metallurgical product. Instead, special metallurgical products that have undergone deep processing (pressure processing, welding, machining, heat treatment, surface treatment, etc.) on the basis of seamless pipes, bars or plates, actually belong to the category of mechanical products. In order to meet the requirements of use, in addition to strict requirements on chemical composition, metallurgical quality, mechanical properties, residual stress, etc. There are strict requirements on the outer diameter, inner diameter, wall thickness, roundness, straightness and thread parameters, sealing performance and structural integrity of the finished product.
Oil well pipe standard
Implementing API-5CT standard drill pipe is the pipe connecting the drilling motor and the drill bit during the drilling process. The outer diameter is generally 2-6.5 inches (50-165mm), and the length is generally between 5-14m. Casing serves as the structural wall or lining of oil/gas wells to prevent contamination of the well or surrounding groundwater and can be up to 26 inches in diameter. Casing accounts for more than three-quarters of oil-specific pipe shipments.
The working principle of oil well pipe
Drilling fluid flows through the drill string to the drill bit to cool the drill bit. At the same time, the drilled earth and rock debris and drilling fluid form mud, which is transported to the ground surface through the annulus (the gap between the casing and the drill string). Due to the harsh working environment, most drill strings are seamless pipes.
Characteristics of OCTG
1. Oil well pipe plays an important role in the petroleum industry:
① Oil well pipes are used in a large amount and cost a lot, so there is great potential for saving expenses and reducing costs.
② The mechanical and environmental behavior of oil well pipes has an important impact on the adoption of advanced technology and production increase in the petroleum industry.
③Oil country tubular goods have huge losses due to failure, and their safety, reliability and service life are of great importance to the petroleum industry
2. Basic characteristics of OCTG
Oil well pipe is not a general metallurgical product. Instead, special metallurgical products that have undergone deep processing (pressure processing, welding, machining, heat treatment, surface treatment, etc.) on the basis of seamless pipes, bars or plates, actually belong to the category of mechanical products. In order to meet the requirements of use, in addition to strict requirements on chemical composition, metallurgical quality, mechanical properties, residual stress, etc. There are strict requirements on the outer diameter, inner diameter, wall thickness, roundness, straightness and thread parameters, sealing performance and structural integrity of the finished product.
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