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161 xing fang pen jie tou
Author(s): 
Pages: 39-40
Year: Issue:  6
Journal: Geology and Prospecting

Keyword:  接头防喷活塞下行泥浆提钻母扣密封胶圈钻铤效果良好排水孔;
Abstract: <正> 为了防止提钻拧卸立根时泥浆喷溅,我队设计、使用了一种防喷接头,经七个多月的实践,效果良好,深受机场同志们的欢迎。一、构造及工作原理构造如图所示。接头体用(?)68钻铤加工制成,上部车成(?)56锁接头母扣,内腔为(?)40的活塞室,中部
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