Abstract: A mixing device comprising a first housing, a second housing, a swedge (or reducer), an inlet for carrier fluid, and an inlet for chemicals, wherein the ratio of the inside diameter of the first housing to the inside diameter of the second housing is in the range of 1:2 to 1:8; the change in diameter between the first and second housing is abrupt, inside the first housing are an inlet agitator and an injection nozzle, inside the second housing is a static mixer, and the swedge is connected to tubing that delivers a mixture of carrier fluid and chemical down a well bore. In an alternate embodiment, the present invention comprises two or three mixing assemblies on a frame.

Abstract: A mixing device comprising three mixing assemblies and first and second horizontal inlet arms, wherein the mixing assemblies are arranged horizontally on a frame, with one mixing assembly on the bottom, one on the top, and one in the middle of the other two mixing assemblies. Each mixing assembly comprises a first housing, a second housing, and a swedge. In a preferred embodiment, the ratio of the inside diameter of the first housing to the inside diameter of the second housing is 1:2, the change in diameter between the first and second housing is abrupt, and the first housing extends into the second housing by a certain distance. Inside the first housing are an inlet agitator and injection nozzle, and inside the second housing is a static mixer. The injection nozzle is located proximate to the point at which the change in diameter occurs between the first and second housing.