The basic difference of outside-vent coring tool from conventional one is that it has a special outside-vent joint installed between safety joint and swivel assembly.
外返孔取心工具与常规取心工具在结构上的根本差异是在安全接头与旋转总成之间设置了一个特殊的外返孔接头。
The basic difference of outside-vent coring tool from conventional one is that it has a special outside-vent joint installed between safety joint and swivel assembly.
外返孔取心工具与常规取心工具在结构上的根本差异是在安全接头与旋转总成之间设置了一个特殊的外返孔接头。
应用推荐