DERRICK HYPERPOOL SHAKER Maintenance & Operation Manual page 13

INTRODUCTION
Box Feeder
The box feeder receives and distributes feed slurry evenly
across the screen frame. Slurry may be received either directly
from the process stream or from a desilter collection pan.
Weir Bypass Feeder
The weir bypass feeder is divided into inlet and outlet tanks.
This design allows the inlet slurry to rise in the inlet tank until
sufficiently high to overflow into the outlet section. Slurry is
evenly distributed across the screen frame, as slurry flows
uniformly over the weir.
The bypass valve (if installed) permits slurry to be diverted from
flowing over the screen panels and go directly to the hopper or
receiving tank. Rotating the bypass wheel opens and closes
the feeder's internal gate valve. When open, the feeder is in
bypass operation where slurry flows directly to the hopper.
Figure 1-6. Box and Weir Bypass Feeders
Desilter and Desander
The 4" hydrocyclone desilter removes 10 to 74 micron solids from drilling fluid (mud), and the 10"
hydrocyclone desander is used to separate solids in the 40 to 100 micron range, The body is the
main component of the 4" hydrocyclone (Figure 1-7). A cone tip is threaded into the bottom of the
body. The soft apex is positioned in the tapered hole inside the triangular nut, which is threaded
onto the cone tip.
The 10" desander consists of three main components: Upper, middle, and lower sections (Figure
1-8). The soft orifice bushing (apex) is positioned in the tapered hole inside the orifice nut, which
is threaded onto the lower section. The orifice nut is threaded onto the lower section.
By varying the apex opening, the hydrocyclone spray pattern may be adjusted during operation.
Turning the orifice nut clockwise compresses the apex, thereby reducing the diameter of its
opening. Turning the nut counterclockwise releases compression, allowing the apex to return to
its original size.
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HyperPoolShaker