特大涌水孔绳索取心钻探施工工艺

Drilling Technology of Wire-line Coring for Super Large Water Gushing Hole

摘要:

针对贵州省瓮安县老虎洞磷矿勘查工作中的部分特大涌水孔，认真研究采用钻孔上部孔段泄水、加重泥浆、Φ56 mm绳索取心钻具、改装S75绳索取心内管总成等多种钻探措施相结合，形成了适用于特大型涌水孔的小口径绳索取心施工工艺。

Abstract:

Aiming at some super large water gushing holes in the exploration at Laohudong phosphate mine in Wengan County of Guizhou Province, the top hole section of water releasing, weighted mud, Φ56mm wire-line coring tool, S75 wire-line coring inner pipe assembly refitting and some drilling methods were combined to form a complete set of small diameter wire-line coring construction technology for super large gushing water.