During drilling of a deep oil well, the drill pipe got rigidly stuck. It was nec

Question

During drilling of a deep oil well, the drill pipe got rigidly stuck. It was necessary to determine the depth at which the jamming occurred. The engineer ordered the pipe subjected to a large upwards tensile force, i.e., she pulled on it. As a result, the top of the pipe came up due to elastic stretch by 550 mm. At the same time, measurements showed that the pipe elongated by 0.35 mm in a 200 mm gauge length. Determine the depth at which the pipe was stuck. Assume the cross-section of the pipe is constant with depth. Please Help Thanks!!

Explanation / Answer

as pipe stucks so measurements in gauge length and in actual condition are equal i.e. strain remains same

0.35/200=550/x

x=314.285 m ans

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