Abstract
Mechanical stirrers are most popular in drilling practice. The circulation system of a drilling rig must have efficient stirrers to ensure homogeneity of the whole drilling mud. A parameter is proposed that characterizes the stirrer performance objectively and comprehensively, since it is an analog of unit power consumption for mixing, and also permits generalization of the experimental data and their use in the design of new apparatuses. The best stirring quality was ensured by the 2PM stirrer, whose main blades are bent backward, while the axial flow created by the additional blades is directed upward. The time for stirring 10 m/sup 3/ of the mud was t = 2 h 40 min, no sediment settled on the tank bottom, the unit energy consumption was w = 1.1 kI X h/m/sup 3/, the efficiency factor was K /SUB e/ = 3300.
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