ELECTRODE SYSTEM OF DOWNHOLE ELECTRO-HYDRAULIC PULSE DEVICE Russian patent published in 2012 - IPC E21B43/24 H01T9/00 

FIELD: oil-and-gas production.

SUBSTANCE: proposed system comprises positive and negative electrodes arranged coaxially opposite each other in metal case with openings made opposite electrode gap, conductor to feed current to positive electrode. Note here that negative electrode is connected with case bottom. Positive electrode features a cone shape, cone apex is directed toward negative electrode. Insulation coat is applied on cone side surface and positive electrode cone base and said conductor to feed current to positive electrode. Aforesaid case allows positive electrode cone base to thrust there against. It differs from known designs in that annular magnet or set of disk magnets is mounted at case end face and/or at positive electrode cone base. Besides, said annular magnet or set of disk magnets is mounted tightly at case end face and/or at positive electrode cone base.

EFFECT: higher reliability at high hydrostatic and pulsed hydrodynamic pressures.

2 cl, 2 dwg