AUTOMATIC PRESSURE PULSAR Russian patent published in 2006 - IPC E21B43/25 

FIELD: oil and gas production industry, particularly devices for pressure treatment and cleaning of formation bore zone in automatic regime for well development and well output recovery.

SUBSTANCE: pulsar comprises hollow body with radial channels, hollow rod with radial channels, inlet and equalizing valves and hydraulic brake time relay. The hollow rod is movable and serves as inlet valve. The hollow rod and the body define vacuum chamber. The equalizing valve is made as movable rod valve with slide. The pulsar is provided with collet having ribs located in lower pulsar part to provide rod valve actuation and return in initial position, as well as with springs to provide translation thereof to close equalizing valve and to open inlet valve. Hydraulic brake time relay is rigidly connected to the body and has adjusting screw arranged on hydraulic brake time relay outside. The adjusting screw is adapted for depression-repression cycle frequency setting.

EFFECT: provision of automatic well vibratory treatment and cleaning regime by applying pulses to depression and repression bed.

3 dwg