FIELD: oil production. SUBSTANCE: generator has a case joined to drill pipe string. Hollow rod and sealing member are placed in the case. Rod walls are provided with holes placed between the nozzle and rod end. Sealing member separates rod wall holes and nozzle cavity in the position when the rod is extended out of the case to the maximum distance. Nozzle cross section area and rod wall holes total area are related through a proper ratio. EFFECT: higher efficiency. 2 cl, 2 dwg
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