Drilling Technology of Directional Kilometer Drilling Machine in Zhaozhuang Mine
The kilometer drilling machine has the advantages of good directional performance,large gas drainage volume fraction,long drainage time,and high drilling completion rate.It has a very broad application prospect in Zhaozhuang Mine,where the coal seam gas content is high,the coal seam permeability coefficient is large,and the coal quality is hard.But how to use the directional drilling machine to achieve long-distance drilling construction has always been a difficult problem in drilling construction.Based on the background of Zhaozhuang Mine,the drilling technology of directional kilometer drilling machine was studied,and it was found that during the construction of directional long borehole openings,a straight drilling method should be adopted,with moderate drilling pressure and pump volume used as much as possible to control the advance and flow volume.The secondary oblique drilling method of"oblique drilling+conventional drilling+oblique drilling+conventional drilling"has a better oblique effect.The research on this construction technology provides a certain reference for the directional drilling construction of subsequent mines.
kilometer drilling machinedrilling constructionoblique drillinggas drainage
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