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当井内出现井涌预兆时,向钻杆内投入止回阀,可即时制止井内异常情况的发生。文章介绍了安装在钻杆内的防喷工具的结构和工作原理。
When there is an indication of a well in the well, a check valve can be put into the drill pipe to immediately stop the occurrence of abnormal conditions in the well. This article describes the structure and working principle of a blowout preventer installed in a drill pipe.