# The A-36 steel drill shaft of an oil well extends 12000 ft into the ground. The...

###### Question:

The A-36 steel drill shaft of an oil well extends 12000 ft into the ground. The pipe used to drill the well is suspended freely from the derrick at A. (Figure 1) The shaft consists of three different sizes of pipe, AAB = 2.10 in.2, ABC = 1.50 in?, and ACD = 1.00 in., each having the length and weight per unit length indicated. Figure < 1 of 1 > AAB 5000 ft WAB= 3.2 lb/ft Авс 5000 ft Wec= 2.8 lb/ft Аср wcd= 2.0 lb/ft 2000 ft
Part A Determine the maximum average normal stress in pipe string AB Express your answer to three significant figures and include appropriate units. TT Å O 2 ? 0A = Value Units Submit Request Answer Part B Determine the maximum average normal stress in pipe string BC. Express your answer to three significant figures and include appropriate units. i HÅR O ? OB= Value Units Submit Request Answer
Part Determine the maximum average normal stress in pipe string CD. Express your answer to three significant figures and include appropriate units. oc= Value Units Submit Request Answer Part D Determine the elongation of its end D with respect to the fixed end at A. Express your answer to three significant figures and include appropriate units. 8D = Value Units Submit Request Answer

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