introduction to  API 5CT J55 K55 N80q L80q P110 L8013cr Oil casing

API 5CT J55 K55 N80q L80q P110 L8013cr Oil Casing with Buttress Thread, Stc Btc Casing steel Pipe china Factory The oil and gas industry relies heavily on the use of casing pipes to ensure the safe and efficient extraction of oil and gas from the ground. One of the most commonly used types of casing pipes is the API 5CT J55 K55 N80q L80q P110 L8013cr oil casing. In this article, we will provide an introduction to this type of casing and discuss its various features and applications.
API 5CT J55 K55 N80q L80q P110 L8013cr oil casing is a type of steel casing pipe that conforms to the American Petroleum Institute (API) specification 5CT. This specification sets standards for the mechanical properties, chemical composition, and testing requirements of casing pipes used in the oil and gas industry. The J55, K55, N80q, L80q, P110, and L8013cr designations refer to different grades of steel used in the manufacturing of these casing pipes.
Tensile and Hardness Requirements
Grade  Yield Strength MPaTensile StrengthHardness a,cSpecified Wall ThicknessAllowable Hardness Variation b
 TypeTotal Elongation Under Load min MPamax  
   minmax HRCHBWmmHRC
L80 L8010.555265565523241
L809Cr 13Cr0.555265565523241
        12.71 to 19.044
        19.05 to 25.395
        ³ 25.406
        12.71 to 19.044
        19.05 to 25.395
        ³ 25.406
        12.71 to 19.044
        19.05 to 25.395
        ³ 25.406
        12.71 to 19.04 19.054
a In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method.
b No hardness limits are specified, but the maximum variation is restricted as a manufacturing control in accordance with 7.8 and 7.9.
c For through-wall hardness tests of Grades L80 (all types), C90, T95 and C110, the requirements stated in HRC scale are for maximum mean hardness number.
One of the key features of API 5CT J55 K55 N80q L80q P110 L8013cr oil casing is its buttress thread. The buttress thread is a type of thread profile that provides a strong and secure connection between two casing pipes. This thread design allows for easy and efficient installation and removal of the casing pipes, making it a popular choice in the industry. API 5CT J55 K55 L80 N80 P110 Oil Casing Steel Pipe and TubingAPI 5CT J55 K55 N80q L80q P110 L8013cr oil casing is available in various sizes and lengths to suit different drilling and extraction requirements. The casing pipes can be manufactured with either external upset ends (EUE) or non-upset ends (NUE). The EUE design provides a larger inside diameter, allowing for the use of larger diameter production tubing. On the other hand, the NUE design is more cost-effective and is commonly used in shallow wells. In addition to the buttress thread and various size options, API 5CT J55 K55 N80q L80q P110 L8013cr oil casing also offers excellent corrosion resistance. The casing pipes are typically coated with a protective layer, such as zinc or epoxy, to prevent corrosion and extend their service life. This corrosion resistance is crucial in ensuring the integrity of the casing pipes and preventing any leaks

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