Question

A drillstring has 5,000 ft long, and 5.0 in outer diameter drillpipe. While the pipe was moving, it was suddenly stopped. A torque of 270 lbf-in is applied which develops torsional stress and angle at a distance of 4.15 from the center of the pipe. Assume that the Young’s modulus of elasticity for steel is 29 ´ 106 psi and Poisson’s ratio is 0.64. Find out the shock load, torsional stress, maximum shear stress and differential angle of twist.

Answer 1

Respuesta:

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Explicación: