Efficient drilling technology of directional drilling for interbedded sections of limestone and mudstone underground mine
In response to the problem of complex situations such as collapse and jamming in the interbedded limestone and mudstone sections of directional long drilling,which leads to low drilling efficiency,based on a large amount of on-site practice,it was found that by controlling the inclination angle of the borehole,strengthening the control of the marker layer,and preventing borehole collapse.A comprehensive process combining threaded drill pipe penetration,pressurized grouting sealing,and 1.75 ° screw branching was adopted to deal with borehole collapse.Practical applications showed that this technology can effectively solve the problem of borehole collapse in interbedded sections of limestone and mudstone,greatly improving drilling efficiency,and providing valuable experience for directional long drilling construction in mines with similar conditions such as Huainan mining area.
interbedded limestone and mudstonetreatment of hole collapsedrilling horizon controldrilling efficiency
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