摘要
宣东二号矿布设施工的大口径瓦斯抽放井以小口径导向钻进,后逐级扩孔成井。总结了该孔施工过程中的主要技术经验,如导向孔粗径钻具组合、钻压控制、钻井液使用以及下管和固井等,提出了其中存在的问题以及下一步改进的建议。
The large-diameter gas drainage well laid out in the Xuandong No.2 Mine used small-diameter pilot drilling,then gradually reaming the borehole and finally completed to designed size.The paper summed up main technical experiences during the operation,such as to use large-diameter drilling tool assemblage in pilot hole,drilling pressure control,drilling fluid selection,going down and cementing.Found out problems existing and put forward improving suggestions.
出处
《中国煤炭地质》
2006年第S1期77-78,共2页
Coal Geology of China
关键词
瓦斯抽排井
导向钻进
煤矿大口径钻孔
gas drainage well
pilot drilling
coalmine large-diameter borehole
