Abstract: Two circular rows of through channels in the walls of the pump mixing chamber serve to admit the conveying fluid into said chamber. The axes of the channels in one row are inclined to the cross-sectional plane of the mixing chamber and to the plane passing through its longitudinal axis, thus forming a vortex stage. The axes of the channels in the other row are inclined only to the cross-sectional plane of the mixing chamber, thus forming an injecting stage. The distance between the stages is selected so as to arrange the points of intersection of the channel axes of the vortex stage and the point of intersection of the channel axes of the injecting stage in one and the same plane which is perpendicular to the longitudinal axis of the mixing chamber.This pump can be used in devices for sucking in, conveying and placing loose materials, for lifting slurry in rotary drilling of wells with the well face cleaned by the indirect flushing method and in the devices for the preparation of clayey suspension.