MULTI-PULSE SOURCE IMPACTING ON WALLS OF WELL FILLED WITH LIQUID Russian patent published in 2014 - IPC E21B28/00 E21B37/00 E21B43/25 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas producing industry and can be used for increase of oil and gas production rate of wells. Multi-pulse source impacting on walls of well filled with liquid contains sealed chambers separated by valves and made as cylinders with windows and equipped with differential pistons. In the first valve ball gate unlocks differential piston by means of a locker driven by the engine through coupling connected to a screw supported by the locker. In other sealed operating chambers locking sleeves are fixed rigidly with differential pistons and locked at balls located in grooves of intermediate covers and supported by cylindrical part of the locker. The locker is fixed by a spring to the piston, which is connected with the previous chamber. The whole device is moved in the well by means of a logging cable.

EFFECT: reducing costs due to decrease of round-trip operations during treatment of wells and increasing well production rate.

2 dwg