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Drilling mud agitators design

Drilling mud agitators must be installed properly with proper configuration/design. Poor performance will result from improper sizing of equipment and improper installation

Drilling mud agitator design parameters

The subjective issues including gear box, impellers, shaft, and so on. The objective issues including tank and compartment dimensions, the compartment shape, the compartment function (reserve, testing, solids removal, suction, or pill tank), the Max. mud density expected.
Once these information is collected the design process focuses on the impeller size and type, and the amount of energy required. For the impeller, which is the better or right one? Impeller design will promote one of these components by sacrificing effectiveness of the other. The amount of fluid that is moved by an impeller is its pumping capacity, or displacement capacity, and most manufacturers have undergone extensive testing to determine flow characteristics and capacities for type and size of impeller.
Drilling mud agitators

Right impeller selection

We know there are radial flow impeller, contour impeller, and the axial flow impellers. During operation, different flow pattern with different features come from impeller type and design. And the impellers will be commonly with 4 blades. Usually the impeller can be welded with flat blade, or canted blade, even the contour blade
According to different flow shape, features, result we need we can do certain selection. The radial flow results when the impeller blades are vertically mounted on center plate. In radial flow, the impellers move fluid in a predominantly horizontal, circular pattern within the compartment.
The axial flow impellers draw fluid from the compartment top along the axis of the impeller shaft and push or “pump”, the fluid downward to the bottom, then along the bottom to the side wall, which forces the fluid upward and to the surface, where it completes the journey and begins again.
The impellers fabricated with variable pitch called contour or swept-face impellers, promote both radial and axial flow patterns to a greater or lesser degree. These impellers typically impart less shear force to the fluid than single-plane blades.

The agitator shaft design

 Mainly two types of shaft are used, the solid shafts and hollow shafts. The solid shafts designed with desired length and joined to gear box output shaft with rigid coupling. The hollow shafts are especially suited for deep tanks and supplied in flanged sections and bolted together, making installation possible where overhead height is limited.
Actually, the impeller can be designed with bolts as well for bolting on the center plate. This will provide us more convenience on installing big size impeller

Drilling mud agitators