Question 2 An onshore rig is drilling a production well with drilling pipe with the dimension of 250 mm outer diameter and 130mm inner diameter, see Figure 2. When drilling the drilling pipe, suddenly hit a bedrock which cause the drilling operation stop, see Figure 2. The drilling pipe is made of steel with the modulus of elasticity of 200 GPa and coefficient of thermal expansion is 11.7x106/°C. Assuming the initial temperature of the drilling pipe is 27°C and final drilling pipe temperature is 80°C, compute: a) the reaction force at point A and B 130mm Trng 250mm Sandstone 3500m b) Normal stress exhibit by the drilling pipe c) Is normal stress exhibit compression. or tension? 2cm Rodrock

Question 2 An onshore rig is drilling a production well with drilling pipe with the dimension of 250 mm outer diameter and 130mm inner diameter, see Figure 2. When drilling the drilling pipe, suddenly hit a bedrock which cause the drilling operation stop, see Figure 2. The drilling pipe is made of steel with the modulus of elasticity of 200 GPa and coefficient of thermal expansion is 11.7x106/°C. Assuming the initial temperature of the drilling pipe is 27°C and final drilling pipe temperature is 80°C, compute: a) the reaction force at point A and B 130mm Trng 250mm Sandstone 3500m b) Normal stress exhibit by the drilling pipe c) Is normal stress exhibit compression. or tension? 2cm Rodrock

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter10: Drilled-shaft Foundations

Section: Chapter Questions

Problem 10.9P

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