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Large hole drilling and pumping integration supporting products
The use of regular drilling technology in high-gas soft outburst coal seam drilling is easy to cause hole collapse, holding drilling and other hole events.
Therefore, it not only increases the difficulty of drilling construction, but also causes the drainage hole blockage due to the instability and collapse of the hole wall after the completion of drilling construction.plug, affect the drainage effect, how to improve the soft outburst gas extraction concentration and extraction volume has been coal mine gasA major problem of governance. The construction process of lowering the screen from the inner hole of the drill pipe after drilling can solve the problem of drilling.The problem of blockage of the drainage hole caused by collapse, thereby improving the drainage effect
