WELL JET PLANT FOR CLEANING OF BOTTOM HOLES FROM SAND PLUGS IN CONDITIONS OF ABNORMAL LOW FORMATION PRESSURES Russian patent published in 2010 - IPC E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: device includes ejector pump installed on flexible flow column and including the housing in which there installed coaxially to flexible flow column is nozzle and mixing chamber with duffuser, as well as there is axial channel and transverse working medium supply channel interconnected with it and made below the nozzle. Parallel to axial channel there is supply channel of the medium pumped from the well. On the upper end side the axial channel is interconnected with the nozzle, and on lower end side it is interconnected with multi-nozzle atomiser installed under the housing and provided with possibility of being rotated under influence of the leaving working medium about the axial channel axis. Below transverse channel, on external side surface of the housing there installed is seal made from elastic material, e.g. from rubber, and consisting of not less than two sealing cups separated with metal gaskets.

EFFECT: simplifying the device design, reducing the manufacturing costs of the proposed invention, improving the operating reliability of the device and efficiency of the carried out works on destruction of sand plugs.

2 cl, 1 dwg