Page 111 - Shale Shakers Drilling Fluid Systems
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94 SHALE SHAKERS AND DRILLING FLUID SYSTEMS
FIGURE 2-4
E); or have a divided deck which uses more than shaker. The capacity is determined by the combi-
one screen to cover the screening surface (Figures nation of two factors:
2-4B and F); or with individual screens mounted 1. The fluid limit is the maximum fluid flow
at different slopes (Figures 2-4G and H). On mul-
tiple deck units, fluid passes through the upper rate that can be processed through the shaker
screen.
deck before flowing to the next deck (Figures 2- 2. The solids limit is the maximum amount of
4B, F, and H).
solids that can be conveyed off the end of
the shaker.
SHALE SHAKER LIMITS These two limits are interrelated in that the amount
of fluid that can be processed will decrease as the
A shale shaker's capacity is reached when ex- amount of solids increases.
cessive drilling fluid (or the drilling fluid liquid Any shale shaker/screen combination has a
phase) first begins discharging over the end of the fluids-only capacity (i.e., no solids are present that
