双管双动取心钻具异径接头的改进

Improvements of Different Diameter Connection of Double-barreled Double-acting Boring Tool

摘要:

介绍了在河北衡水水文地质科学钻探中对双管双动取心钻具异径接头所做的改进及取得的效果。

Abstract:

The paper mainly introduces the improvement on different diameter connector of double-barreled and double-acting coring tool in Hengshui hydrogeology scientific drilling with the improving’s effects.