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Question 1 State whether true or false; if false, explain why: a. Buoyancy is the factor that decreases the actual weight of the drill string. b. The three major operational parameters are bit load, bit rotation and circulation rate. c. Adequate upward velocity of drilling mud is necessary to carry the cuttings outside the hole. d. Horizontal drilling is the most difficult drilling system. e. Drilling is the operation by which the drill string is forced into the rocks by the cutting action of the rock bit at the

Question 1 State whether true or false; if false, explain why: a. Buoyancy is the factor that decreases the actual weight of the drill string. b. The three major operational parameters are bit load, bit rotation and circulation rate. c. Adequate upward velocity of drilling mud is necessary to carry the cuttings outside the hole. d. Horizontal drilling is the most difficult drilling system. e. Drilling is the operation by which the drill string is forced into the rocks by the cutting action of the rock bit at the

Fundamentals of Geotechnical Engineering (MindTap Course List)
Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter19: Drilled Shaft
Section: Chapter Questions
Problem 19.1P
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Question 1 State whether true or false; if false, explain why: a. Buoyancy is the factor that decreases the actual weight of the drill string. b. The three major operational parameters are bit load, bit rotation and circulation rate. c. Adequate upward velocity of drilling mud is necessary to carry the cuttings outside the hole. d. Horizontal drilling is the most difficult drilling system. e. Drilling is the operation by which the drill string is forced into the rocks by the cutting action of the rock bit at the
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