FIELD: drilling machinery and equipment. SUBSTANCE: this particularly relates to drilling oil and gas wells by turbine method. Vibration device has body which is built-in into string of drilling pipes. Mounted along body axis is eccentric member which by its upper end is connected to hydraulic turbine. Lower end of eccentric member is in contact with disk which freely rotates around body axis due to unbalance. Disk has hole for passing of drilling fluid. This hole is periodically closed by eccentric during its rotation. Application of aforesaid embodiment of vibration device substantially enhances efficiency of drilling bore-holes due to bringing higher axial thrust to drilling bit with directed generation of vibrations. EFFECT: higher efficiency. 2 dwg
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