FIELD: well drilling, particularly to drill slanting-horizontal wells in ground including rock particles weakly bound with clay or clay loam.
SUBSTANCE: well drilling device comprises drilling bit. Drilling bit body has high-strength cutters and connection unit for drilling bit connection with drilling string. Drilling bit body is hollow and provided with orifices. Pipe is fixedly fastened to the body. Pipe ends have annular partitions. Ball-like or rod-like milling members are arranged in the pipe.
EFFECT: improved well wall consolidation, efficient ground excavation from well along with drilling mud or water and increased well drilling rate.
5 cl, 1 dwg
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