FIELD: mining.
SUBSTANCE: invention relates to devices for generation of vibrations for drilling wells. Downhole tool comprises housing with longitudinal channel, a mixer unit arranged inside longitudinal channel of housing and comprising a power part with a rotor and a valve unit which is connected to rotor and which is configured for selective opening by rotor rotation to allow fluid through mixer, and a removable component arranged inside longitudinal channel and configured for removal so as to at least partially open longitudinal channel.
EFFECT: enabling borehole works downstream pulsations device without complete removal thereof.
17 cl, 10 dwg
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