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1. 发明授权

US4301877A Clad mud nozzle 失效
标题翻译：包泥喷嘴
公开(公告)号：US4301877A
公开(公告)日：1981-11-24
申请号：US128695
申请日：1980-03-10
申请人： John D. Cloud
发明人： John D. Cloud
IPC分类号： E21B10/18 , E21C13/01
CPC分类号： E21B10/18
摘要： An earth boring drill bit has a drilling fluid nozzle with features that protect the nozzle retaining ring from erosion and avoid pressing cracks. The drill bit has a passage with at least one outlet and a nozzle located at the outlet for discharging fluid. The nozzle has a shell mounted in the outlet and retained by a retaining ring. An insert is bonded inside the shell. The insert is of tungsten carbide or ceramic for resisting erosion. The insert has an extended portion that extends below the rim of the outer member for protecting the retaining ring from flowing drilling fluid.
摘要翻译：钻孔钻头具有钻井液喷嘴，其特征在于保护喷嘴保持环免受侵蚀，并避免挤压裂纹。钻头具有至少一个出口和位于出口处用于排出流体的喷嘴的通道。喷嘴具有安装在出口中并由保持环保持的外壳。外壳内部插入一个插入物。插入物是碳化钨或陶瓷以抵抗侵蚀。插入件具有在外部构件的边缘下方延伸的延伸部分，用于保护保持环不会流动钻井液体。

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