U-shaped bubble ring generation device and method

Abstract

The invention relates to a U-shaped bubble ring generation device and method. The U-shaped bubble ring generation device consists of a bubble generation portion and a bubble ring generation portion; agrid is arranged at the tail end of the bubble generation portion, a drainage plate is arranged in the middle of the bubble ring generation portion, bubble liquid is fully in contact with air to generate bubbles, bubbles are uniformly distributed in a pipe through the grid, heavy crude oil enters from the oil tube, the bubbles enter an annular cavity, after the flow of the bubbles is stabilized by the drainage plate, a bubble thin layer which is stable and uniform is formed, the heavy crude oil is isolated from a tube wall to obtain an annular flow which takes the bubbles as an outer ring, and the heavy crude oil which is attached to the tube wall is reduced; and the heavy crude oil delivering resisting is reduced, deposition of wax crystals and asphaltene on the bottom of a pipe are relieved, and recovery and transportation energy consumption for the heavy crude oil is reduced favorably; and when transportation stops, the bubbles can be separated into a bubble layer and a water layerin a short time, by the bubble layer, the heavy crude oil is prevented from being in contact with the upper surface of the tube wall, the water layer prevents the heavy crude oil from being in contact with the lower surface, and restarting of a pipe system is facilitated.

Description

technical field [0001] The invention relates to a U-shaped foam ring generating device and a method for generating a foam ring by using the device, belonging to the technical field of drag reduction in heavy crude oil production and transportation. Background technique [0002] At present, heavy crude oil belongs to the energy field of key exploitation, and its content of colloid and asphaltenes is high. Due to the characteristics of high density, high viscosity and poor fluidity, it is easy to adhere to the pipe wall, resulting in The process needs to provide enough energy to overcome the flow resistance. In addition, high waxy crude oil has a high freezing point, and wax crystals are easily precipitated during the flow process, resulting in pipeline blockage. These problems have brought great challenges to the extraction and transportation of heavy crude oil. [0003] The production and transportation processes of heavy crude oil at home and abroad mainly include dilution...

AI Technical Summary

Problems solved by technology

However, these traditional heavy crude oil drag reduction processes have certain disadvantages: the dilution method requires a stable and reliable supply of thin oil resources; the heating method has high energy consumption and is prone to the risk of condensation pipes; A large amount of water is added, and the corrosion and scaling of the pipeline are serious; the crude oil upgrading method requires high equipment and large investment; the late stage of the emulsification viscosity reduction method needs to be demulsified

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