PRESSURE HYDRODINAMIC PULSER Russian patent published in 2009 - IPC E21B28/00 

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production can be used for bottom hole zone cleaning and well production rate increase. Equipment consists of case with windows, bottom cap, and windows covering spring loaded barrel shaped element, installed with possibility to move and separating constant pressure and impulse pressure areas, sit, locker-string loaded piston, top sub, hub fixed to the case, shaft, installed in hub with use of bearings and fixed with bottom cap. An adjusting nut installed in a case, which supports piston string, supporting hub. Piston string stiffness is greater than hub string stiffness. Area over piston connected to area of constant pressure, and area bellow connected with pulsing pressure area via located in case bottom part holes.

EFFECT: equipment operation efficiency increase.

1 dwg