Overview of CN101705424A – N80grade welding petroleum casing

CN101705424A - N80-grade welding petroleum casing ...
CN101705424A is a patent application that focuses on the development of a welding petroleum casing with N80-grade steel. This article provides an overview of the patent application, highlighting its significance and potential impact on the petroleum industry. The patent application CN101705424A introduces a novel welding petroleum casing made from N80-grade steel. This casing is specifically designed for use in the petroleum industry, where it plays a crucial role in Oil and gas extraction. The N80-grade steel used in this casing offers several advantages over traditional materials, making it a promising innovation. One of the key features of this welding petroleum casing is its enhanced mechanical properties. The N80-grade steel used in its construction exhibits excellent strength and toughness, making it highly resistant to deformation and damage. This ensures the casing can withstand the extreme conditions encountered during drilling and extraction processes, providing a reliable and durable solution for the petroleum industry.
 API 5ct  L80 casing Tubing Range Lengths
 Range 1Range 2Range 3
CASING (PE/T and C/SF)   
Total range length, inclusive Permissible variation, max a4.88 to 7.62 1.837.62 to 10.3610.36 to 14.63 1.83
  1.52 
TUBING AND CASING USED AS TUBING   
(PE/T and C/SF)   
Total range length, inclusive Permissible variation, max a6.10 to 7.32 b8.53 to 9.75 c11.58 to 12.80 d
 0.610.610.61
INTEGRAL TUBING connectionS (including IJ/PE   
and IJ/SF)   
Total range length, inclusive Permissible variation, max a6.10 to 7.92 e8.53 to 10.3611.58 to 13.72 0.61
 0.610.61 
PUP JOINTSLengths: 0.61; 0.91; 1.22; 1.83; 2.44; 3.05 and 3.66 e
 Tolerance: ±0.076
a Length variation applies to rail car shipment to the point of use and does not apply to order items of less than 18,144 kg of Pipe.
b By agreement between purchaser and Manufacturer, the maximum length may be increased to 8.57 m.
c By agreement between purchaser and manufacturer, the maximum length may be increased to 10.76 m.
d By agreement between purchaser and manufacturer, the maximum length may be increased to 17.72 m.0.61 m pup joints may be furnished up to 0.91 m long by agreement between purchaser and manufacturer, and lengths other than those listed may be furnished by agreement between purchaser and manufacturer.
Furthermore, the welding petroleum casing described in CN101705424A offers improved Corrosion resistance. The N80-grade steel is specifically formulated to resist the corrosive effects of the surrounding environment, including exposure to various chemicals and high temperatures. This corrosion resistance is crucial in maintaining the integrity of the casing, preventing leaks and ensuring the safety of the extraction process. In addition to its mechanical and corrosion-resistant properties, the N80-grade welding petroleum casing also exhibits excellent weldability. This means that the casing can be easily joined together using various welding techniques, ensuring a secure and reliable connection. The ability to weld the casing effectively reduces the risk of failure and enhances the overall performance of the petroleum extraction system.
The patent application CN101705424A also highlights the manufacturing process of the N80-grade welding petroleum casing. The application describes a method that involves heating the steel to a specific temperature range, followed by controlled cooling to achieve the desired mechanical properties. This manufacturing process ensures consistent quality and performance of the casing, meeting the stringent requirements of the petroleum industry. API 5CT eue Btc Thread T95 octg seamless oil casing pipe The introduction of the N80-grade welding petroleum casing described in CN101705424A has the potential to revolutionize the petroleum industry. Its enhanced mechanical properties, corrosion resistance, and weldability make it an attractive alternative to traditional casing materials. The improved performance and durability of this casing can lead to increased efficiency and cost-effectiveness in oil and gas extraction operations. Moreover, the N80-grade welding petroleum casing offers environmental benefits. Its corrosion resistance reduces the risk of leaks, preventing the release of harmful substances into the environment. This not only protects the ecosystem but also ensures compliance with environmental regulations. alt-6615 In conclusion, the patent application CN101705424A introduces a welding petroleum casing made from N80-grade steel. This casing offers enhanced mechanical properties, corrosion resistance, and weldability, making it a promising innovation for the petroleum industry. Its potential to improve efficiency, durability, and environmental sustainability makes it a significant development in the field of oil and gas extraction.

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