Page 155 - Shale Shakers Drilling Fluid Systems
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138 SHALE SHAKERS AND DRILLING FLUID SYSTEMS
designs include a special application where back- Construction consists of a corrugated, pretensioned
ing and fine screen(s) materials are bonded to- screen cloth and bonded to a rigid frame.
gether, eliminating the need for perforated plates. Like bonded flat screens, the three-dimensional
Flat-surfaced, pretensioned screen panels are screen panel needs only to be held firmly in place
becoming popular because of their even tensioning, with a hook strip or other means to prevent sepa-
easy installation, and the even distribution of liq- ration between the shaker bed and the screen
uids and solids across the screen deck. panel during vibration. Three-dimensional screen
panels can be used to support any type or style
of wire cloth and can be used with any type of
Three-Dimensional Screen Panels motion.
Three-dimensional screen panels allow solids to
Three-dimensional screen panels were intro- be conveyed down into the trough sections of the
duced in the mid-1990s. These typically offer more screen panel. When submerged in a liquid pool,
screening area than flat-panel, repairable plate this preferential solids distribution allows for higher
screens while retaining the ability to be repaired. fluid throughput than is possible with flat screen
This type of screen panel adds a third dimen- panels by keeping the peaked areas clear of sol-
sion to the previous two-dimensional screens. The ids. A three-dimensional screen panel improves dis-
screen surface is rippled and supported by a rigid tribution of fluid and solids across the screen panel.
frame. Most three-dimensional screen panels re- This reduces the characteristic "horseshoe effect"
semble the metal used in a corrugated tin roof. caused by shakers using crowned screen beds.
