METHOD AND DEVICE FOR DEVELOPMENT OF OIL AND GAS-OIL DEPOSITS Russian patent published in 2013 - IPC E21B43/25 E21B28/00 

FIELD: oil and gas industry.

SUBSTANCE: device for long-wave action on an oil deposit includes a shock-wave generator, a pump station, a cylinder with a stockless piston dividing it into two cavities. One cavity is connected to the well cavity and to a circulating pump, and the other one is connected to the shock-wave generator. With that, connection of the cylinder with the stockless piston to the circulating pump is made through a non-return valve. In the well there installed is a coaxial pipeline consisting of two pipelines, in which an internal pipeline of smaller diameter is made from elastic material and an external pipeline of larger diameter is made from solid material. Pulse pumping of working fluid is performed to the internal elastic pipeline of coaxial pipeline, and to space between internal elastic and external pipelines there pumped is working fluid so that average hydrostatic pressure in the internal pipeline and in the space between the internal and the external pipelines is maintained on the same level on all horizons of the injection well.

EFFECT: increasing formation oil recovery.

2 cl, 1 dwg