FIELD: mining industry. SUBSTANCE: nozzle 5 is located in area of conical narrowing of body 4, is directed towards face of hole and communicates with inner space of running string 2 by means of drain and pressure hoses 6 through pump 7. Level of fluid in body 1 is inspected with the aid of level indicator 8. EFFECT: improved efficiency of studies with the use of geophysical boreholes. 2 cl, 1 dwg
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