This critical chapter, absent from previous editions, provides a sweeping discussion of numerous important downhole tools. Content includes details on borehole enlargement; circulating subs; downhole mud motors; air hammers; rotary steerable systems; vibration, torque and drag; measurement while drilling; logging while drilling; wireline logging; and jars. Contributors are David Herrington, Lindsey Hughey, Harald Witzler, R.D. Morrison, Scott Powell, Ken Deringer, Dean Enterline, Ron Dirksen, Anthony Plana, Greg Hawley, Jaime Aros, Greg Devenish. Includes one video, 36 color and black-and-white illustrations.
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