The quality of drilling muds and processing fluids directly affects the construction rate, lifespan and the workover operation efficiency of wells. Jet mixers (JM) are used for mixing and primary dispersion of components - they are simple, reliable and manufacturable. Long-term experience in drilling, development and workover operations has shown that JM designs are far from perfection. There is quite often the week ejection, the unstable transport of materials to the mixing chamber, the material wetting in the hopper, and the involvement of a large amount of air in fluids. So the task of improving the JM design and technology is relevant and economically sound. It is shown, that JM improvement is possible if the scale model experiment is completed correctly and by the creating an adequate equation for the JM characteristic as a water-air jet apparatus and taking into account the actual ejection in real conditions of pneumatic transport of powdery material at the JM inlet. When performing the work, we used an analysis of the open information flow based on the existing theory of jet devices, the results of our own experimental studies, the field experience in the operation of mud preparation units, the factory experience in the processing fluids equipment design.
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