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18 Part I Liquid Drilling Systems

Metered Remix
Water (optional)

Metered
Dilution
Water
(optional)

Metered
Mud

Overflow
(free liquid, Underflow
dilution liquid, (solids
and colloidal solids) discharge)
Figure 1.20 A decanting centrifuge.

SUMMARY

This chapter provided a brief introduction to the equipment in the
mud circulating system. Mud pumps, drill pipes, drill collars, and bit nozzles
are the essential components affecting mud drilling hydraulics and thus
drilling performance, which is discussed in later chapters.

REFERENCES
Bourgoyne Jr. A.T., Millheim K.K., Chenevert, M.E., Young Jr. F.S., 1991. Applied
Drilling Engineering. SPE Textbook Series.
Lyons, W.C., Guo, B., Graham, R.L., Hawley, G.D., 2009. Air and Gas Drilling Manual.
Gulf Professional Publishing.
Moore, P.L., 1986. Drilling Practices Manual, second ed. PennWellBooks.

PROBLEMS
1.1 How can you adjust the mud flow rate from the mud pump?
1.2 What is the diameter in inches of a No. 16 nozzle?
1.3 What is the purpose of degassers in the mud circulating system?