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Equipment in Gas Drilling Systems 117

SUMMARY
This chapter provided a brief introduction to the special equipment
employed in gas drilling systems. The key pieces of equipment are gas
compressors that supply powerful gas to the drilling system for hole
cleaning and air hammers with flat-bottom bits.

REFERENCES
Hook, R.A., Cooper, L.W., Payne, B.R., 1977. Air, mist and foam drilling: a look at lat-
est techniques: parts I and II. World Oil (April-May).
Lyons, W.C., Guo, B., Graham, R.L., Hawley, G.D., 2009. Air and Gas Drilling Manual,
third ed. Gulf Professional Publishing.
Lyons, W.C.,Guo,B., Seidel,F.A., 2001.AirandGas Drilling Manual,seconded.
McGraw-Hill.
PROBLEMS

5.1 How does a gas drilling system differ from a mud drilling system?
5.2 What are the primary and the second jets used for?
5.3 Why is the float valve necessary for gas drilling?