水文地质深孔抽水试验工艺技术探索

Technical Exploration of Pumping Test Process in Deep Hydrogeological Hole

摘要:

以河南省禹州市张得区煤详查钻探项目ZK2208钻孔为例，通过采用合理的成井结构、套管异径双重止水、焦磷酸钠+CO2洗井、钻机+千斤顶提拔长观孔内套管等各种工艺措施，有效解决了顺利下入套管、一次性有效止水、有效洗井、顺利提拔套管等各种施工技术难题，顺利完成了1300多米水文地质深孔的施工，达到了地质设计与有关规范的要求。

Abstract:

Take the example of ZK2208 in detailed survey project of Yuzhou of Henan Province, with rational well drilling structure, water stop by different diameter casings, well washing by sodium pyrophosphate and CO2, casing pulling for long term observation hole with drill and jack, the difficulties of casing running, one trial effective water stop, effective well washing and smooth casing pulling have been overcome, a deep hydrogeological hole of more than 1300m in depth has been completed according to the geological design and related regulations.