FIELD: drilling. SUBSTANCE: electrical drill has body filled with oil. Accommodated in body are cable, hydraulic turbine, current generator, and protection and control block. Turbine, generator and protection block are rigidly connected to one another along axis. Protection and control block provides for electric connection between motor and generator within the preset number of revolutions of electric drill. EFFECT: higher efficiency. 2 dwg
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Authors
Dates
1995-03-10—Published
1990-05-21—Filed