Abstract:
It is known that work conditions for the tubing used in oil and natural gas fields are very complicated, thus rather high quality of the pipe is required. Since the tubing coupling is used to connect tubings with threads, stringent requirements are set up for the coupling involving such aspects outside dimensions, connection strength, tightness, comprehensive mechanical properties and corrosion resistance, etc. Likely, rather critical requirements are also specified for the seamless steel tube used as stock of the coupling. Described here in the article is the development of the hot-rolled J55 tube for tubing coupling by Changzhou Baosteel Steel Tube Co., Ltd. with the imported Φ102 mm CPE push bench mill, covering such aspects as manufacturing process flow, technological parameters, technological difficulties concerning the trial manufacture and the countermeasures taken.
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