REPETITIVE IMPLOSION HYDRAULIC PRESSURE GENERATOR Russian patent published in 2007 - IPC E21B37/00 F16F5/00 

FIELD: oil and gas-condensate well repair and development.

SUBSTANCE: device comprises intake pipeline with orifices for well fluid reservoir pressure supply; implosion chamber cylinder, sub connecting intake pipeline with implosion chamber cylinder, piston connected to rod, implosion chamber cylinder, clutch and working chamber. Working chamber has working cylinder with windows and pressure concentrator, as well as shutoff valve, rod, cylindrical compression spring and rigid thrust and shutoff valve clutch, which connects implosion chamber cylinder with working chamber. Working chamber has hydraulic damping means having cylinder and piston sliding with respect to the rod. The rod has annular rim made as a single whole with the rod and may cooperate with sliding piston after working cylinder window opening to absorb axial hydraulic impact content energy. As impact wave passes cylindrical spring may be compressed to non-critical state.

EFFECT: increased oil recovery from oil and gas-condensate reservoirs during oil production well operation by creation of deep repressions in well bottom zone with the use of implosion chamber connected to production string and lowered in well with hydrostatic reservoir pressure and working medium, namely contaminated mix including oil and reservoir water or oil and gas condensate, increased operational reliability of pressure generator.

2 cl, 2 dwg