HYDRAULIC PULSER Russian patent published in 2010 - IPC E21B28/00 

FIELD: oil-and-gas industry.

SUBSTANCE: invention related to oil-and-gas industry and can be used for oil and gas wells operation efficiency increase. Device consists of a case, a barrel with a seat, and an end valve in its axial channel. At the barrels end installed a bolster with a longitude cuttings along its perimetre from external side, pressed from the top with a screw spiral string with a adjusting nut. The barrel executed with figure cylindrical boring and equipped with a seat with a figure piston and the end valve, equipped with a pull, going though the axial channel in a perforated wall and pressed with the string. The figure piston contains stepped boring with a changeable nozzle and screwed barrel, installed in it with ability of creation a movable connection with the support nut and end interconnection with the figure piston. The stepped boring constantly connected hydraulically via radial holes with case under the barrel axial channel.

EFFECT: ability of hydrodynamic impulses application on the produced formation fluid, with formation fluid flow total impulse increase in tubing string axial channel.

2 dwg