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南阳二机集团生产的石油钻机上提升系统中主要承载件如钩筒、钩体等均为铸件,材质选用ZG28CrN iM o A钢。当钻机应用于低温环境时,按照API Spec 8C《钻井和采油提升设备规范》要求,此类部件除了强度要满足一定设计安全系数外,还需要满足以下低温冲击性能要求:-20℃V型缺口冲击吸收能量3件平均值不低于42 J,设计温度低于-20℃时,设计温度下V型缺口冲击吸收能量3件平均值不低于
Nanyang two machines produced by the oil rig on the upgrade system, the main bearing such as hook cylinder, hook body, etc. are castings, the material selection ZG28CrN iM o A steel. When rigs are used in cryogenic environments, these components need to meet the following low temperature impact performance requirements in addition to their strength to meet certain design safety requirements, as required by the API Spec 8C Specifications for Drilling and Production Lifting Equipment: -20 ° C V-notch 3 pieces of impact energy absorption average not less than 42 J, the design temperature is below -20 ℃, the design temperature V-notch impact energy absorption average of not less than 3