定向钻进技术在松软煤层瓦斯抽放中的应用
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摘要
为了提高松软煤层瓦斯抽采钻孔深度、增大钻孔煤层进尺,利用定向钻进技术钻孔轨迹可控的优势,通过优化定向钻孔布置形式和采用定向钻进用冲洗液,试验钻孔深度超过700 m,煤中连续进尺超过400 m,在一定程度上提高了松软煤层瓦斯抽采钻孔深度和煤中进尺,也使得定向钻进技术在松软煤层瓦斯抽采钻孔施工中具有更好的应用与推广价值。
In order to improve the depth of gas extraction drillings and increase the footage of borehole in soft coal seam, taking advantage of the controllable drilling trajectory of directional drilling technology, good results were obtained by optimizing the arrangement of directional drilling and adopting the flushing fluid for directional drilling. The test drilling depth is more than 700 m, and the continuous footage in coal is more than 400 m, which to some extent improves the depth of gas extraction and footage in soft coal seam. It also has better application and promotion value for the directional drilling technology in the soft coal seam gas extraction drilling construction.
In order to improve the depth of gas extraction drillings and increase the footage of borehole in soft coal seam, taking advantage of the controllable drilling trajectory of directional drilling technology, good results were obtained by optimizing the arrangement of directional drilling and adopting the flushing fluid for directional drilling. The test drilling depth is more than 700 m, and the continuous footage in coal is more than 400 m, which to some extent improves the depth of gas extraction and footage in soft coal seam. It also has better application and promotion value for the directional drilling technology in the soft coal seam gas extraction drilling construction.
引文
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[2]殷新胜,刘建林,冀前辉.松软煤层中风压空气钻进技术与装备[J].煤矿安全,2012,43(7):63-65.
[3]秦刚伟,秦法秋.突出煤层瓦斯抽采钻孔技术探讨[J].煤炭技术,2009,28(11):183-185.
[4]孙玉宁,王永龙,翟新献,等.松软突出煤层钻进困难的原因分析[J].煤炭学报,2012,37(1):117-121.
[5]冀前辉,殷新胜,王毅.松软煤层空气钻进工艺试验[J].煤田地质与勘探,2009,37(3):78-80.
[6]许超,李泉新,刘建林,等.煤矿瓦斯抽采定向长钻孔高效成孔工艺研究[J].金属矿山,2011(6):39-41.
[7]姚宁平,张杰,李乔乔.煤矿井下近水平定向钻技术研究与应用[J].煤炭科学技术,2011,39(10):53-57.
[8]姚宁平.我国煤矿井下近水平定向钻进技术的发展[J].煤田地质与勘探,2008,36(4):78-80.
[9]俞启香.矿井瓦斯防治[M].北京:煤炭工业出版社,1992.
[10]马效鸣,胡郁乐,贺冰新,等.钻井液与岩土工程浆液[M].武汉:中国地质大学出版社,2007.