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一种用于油、气生产中带压.不停产更换总闸阀的专用工具——闸阀堵塞器.最近在四川石油管理局川西南矿区研制成功。闸阀堵塞器是由该矿钻井工具管理队机械工程师杨国均自行设
A used for oil and gas production with pressure .Non-stop production to replace the total gate valve special tools - gate valve plug .Recently in the Sichuan Petroleum Administration Southwest Mining successfully developed. Gate valve plugging device by the mine drilling tools management team Yang Guojun mechanical engineers set up their own