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14 Part I Liquid Drilling Systems
desander or desilter when the degasser is in operation. Conventional
gas-liquid separators (Figure 1.15) are also used in mud drilling.
Desanders (Figure 1.16), desilters (Figure 1.17), and the combination
of them, called mud cleaners (Figure 1.18), are hydrocyclone-type equip-
ment. If operated properly, hydrocyclones can perform the finest cut of
any primary separation equipment operating on the full-flow circulating
rate of an unweighted mud system. Understanding the most common
designs of the hydrocyclone is essential to proper operation.
Figure 1.15 A gas-liquid separator. (Courtesy of TSC.)
