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1. The orientation of wide breakout failure will always be in the direction of GH. 2. Tensile Failure Cylindrical occurs when: ot S-To 3. Total stress = Effective Stress of Rock Grains Pore Pressure.

1. The orientation of wide breakout failure will always be in the direction of GH. 2. Tensile Failure Cylindrical occurs when: ot S-To 3. Total stress = Effective Stress of Rock Grains Pore Pressure.

Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter8: Applications Of Plane Stress (pressure Vessels, Beams, And Combined Loadings)
Section: Chapter Questions
Problem 8.3.3P: A scuba t a n k (see fig ure) i s bci ng d e signed fo r an internal pressure of 2640 psi with a...
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1. The orientation of wide breakout failure will always be in the direction of oH. 2. Tensile Failure Cylindrical occurs when: ot <-To 3. Total stress = Effective Stress of Rock Grains Pore Pressure. 4. When the mud weight is high, then at the wellbore wall o, is large and o is small. 5. (ot)e=0 = On - 30H – Pw 6. Granular rocks such as sandstones, become stronger the more they are confined. 7. With low o of clay, rock strength increases much with increased rock confinement. 8. At large distances from the wellbore, o, converge to Oh and ot converge to oH 9. In anticline structure the lowest stress magnitude founds at the crest while greater stresses found along the flanks. 10. The orientation of deep knockout failure will always be in the direction of ơh.
Transcribed Image Text:1. The orientation of wide breakout failure will always be in the direction of oH. 2. Tensile Failure Cylindrical occurs when: ot <-To 3. Total stress = Effective Stress of Rock Grains Pore Pressure. 4. When the mud weight is high, then at the wellbore wall o, is large and o is small. 5. (ot)e=0 = On - 30H – Pw 6. Granular rocks such as sandstones, become stronger the more they are confined. 7. With low o of clay, rock strength increases much with increased rock confinement. 8. At large distances from the wellbore, o, converge to Oh and ot converge to oH 9. In anticline structure the lowest stress magnitude founds at the crest while greater stresses found along the flanks. 10. The orientation of deep knockout failure will always be in the direction of ơh.
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