Nc50 thread connection fatigue6/1/2023 There are several interchangeable with old API connectors, mainly NC50-2 3/8"IF, NC38-3 1/2"IF, NC40-4"FH, NC46-4"IF, NC50-4 1/2"IF. NC is a new series, gradually replacing all IF in the API standard and all FH connectors except 5 1/2" FH. According to the method of thickening, it can be divided into three forms: internal thickening, external thickening, and internal and external thickening. In order to enhance the connection strength of the joint, the wall thickness of the pipe body needs to be increased at the joint. The drill pipe joint is a component of the drill pipe, divided into a male joint and a female joint, which are connected to the two ends of the drill pipe body. According to the threaded button type drill pipe joints, there are four types: REG(Regular style connection), IF(Internal-flush style connection), FH(Full-hole style connection) NC(Numbered Connection).
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