Active rotary dynamic mixer applicable to thick oil mixed with thin oil mining

Abstract

The invention relates to an active rotary dynamic mixer applicable to thick oil mixed with thin oil mining, and belongs to underground mixed stirring equipment of thick oil mining in an oil field. The active rotary dynamic mixer mainly comprises a barrel, a central shaft, a power impeller, a stirring impeller, an upper bearing, a lower bearing, flat keys, a limiting sleeve, guide blades, power blades, stirring blades, a disk and overflowing holes, wherein the upper end of the barrel is connected with the upper bearing by inner threads; the lower end of the barrel is connected with the lower bearing by inner threads; the power impeller and the stirring impeller are arranged on the central shaft; mixed oil flows into the mixer, and vertically impacts the power impeller to rotate after passing through the guide blades; the power impeller is connected with one flat key, and transmits torque to the central shaft; the central shaft is connected with the other flat key to transmit the torque to the stirring impeller; the limiting sleeve is arranged between the power impeller and the stirring impeller; and the guide blades are welded on an inner wall of the barrel, and located below the power impeller. The active rotary dynamic mixer is simple in structure, and convenient to assemble and dismount.

Description

technical field [0001] The invention relates to an actively rotating dynamic mixer suitable for heavy oil mixed-lean production, which belongs to downhole mixing equipment for heavy oil production in oilfields. Background technique [0002] The downhole mixing technology is mainly used to solve the uneven mixing of heavy oil and thin oil in the production of ultra-heavy oil wells, which will easily cause heavy oil to enter the pump and increase the working load of the pump, which will shorten the pump inspection cycle and reduce production costs. increase and other serious consequences. Therefore, it is extremely important to apply good downhole mixing tools to fully mix heavy oil and thin oil. [0003] At present, there are few types of tools suitable for downhole liquid mixing in China, mainly static and dynamic mixers: the static mixer is to install special-shaped templates perpendicular to each other in the pipeline to form a special channel to change the flow of the me...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an actively rotating dynamic mixer suitable for the production of heavy oil mixed with dilute oil. The flow direction of the impeller improves the shearing effect of the impeller on the fluid and the vortex mixing effect, and solves the problem that the pressure drop of the wellbore flow medium is large and the mixing effect of heavy oil and thin oil is not good in the production of heavy oil mixed with thin oil.

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