聚龙小镇DZK1地热勘查孔钻探施工技术

Drilling and Construction Technique of DZK1 Geothermal Exploration Hole in Quanzhou

摘要:

地热勘查孔（探采结合孔）是在矿山钻探施工工艺的基础上进行的探索性施工。着重介绍了福建省泉州市聚龙小镇DZK1地热勘查孔在钻探施工过程中遇到的施工难题以及新技术、新工艺的应用。如大口径单管取心、空压机洗井和活塞洗井相结合的洗井方法、套管的隔级使用、深孔测试钻杆密闭性、深孔磨钻头、在涌水量大的地层钻进等。

Abstract:

The geothermal exploration hole (combined hole of exploration and mining) is an exploratory construction on the basis of the mining construction technology. This paper mainly introduces the construction problems encountered in the drilling construction and the application of new technology and new process, such as large diameter single pipe coring, well washing by air compressor combined with piston, lowing casings by every other grade, drill pipe tightness test for every 50m since drilling depth of 800m, drill bit sharpening by putting stones into the borehole and drilling in large water inflow formation.