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

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.

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