SPARK GAP (ALTERNATIVES) Russian patent published in 2003 - IPC

FIELD: electrical engineering. SUBSTANCE: spark gap may be used in devices for recovering and raising debit of water-bearing stratums and well screens, manufacturing cast-in-situ piles. and also for coreless construction of wells and cleaning hydraulic service lines. Spark gap of first design alternate has reflector secured on electrodes connected to cable and is provided with screen having hole in near-axis area and mounted at output of reflector with aid of pylons. Spark gap of second design alternate has spring-loaded reflector designed for axial displacement and turn about its axis and provided with set of radial brackets converging in near-axis area and secured on its periphery. EFFECT: enhanced efficiency of hydrodynamic action of flow due to its acceleration and use of inertia forces built up in deflection. 2 cl, 4 dwg