FIELD: geological exploration on sea bottom. SUBSTANCE: drilling rig is provided with supporting frame-reservoir which is filled with water, water level sensor and pump with electric motor; drive for rotation of drilling rod is made in form of hydraulic motor and drive for delivery is made in form of two hydraulic cylinders; inlets of hydraulic motors and delivery hydraulic cylinders are connected with surrounding medium through flow distributors; their outlets are connected with reservoir through throttle valves; reservoir is communicated with atmosphere and is connected with pump inlet. EFFECT: reduced power requirements; possibility of effective operation at deep depths. 2 dwg
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