Drilling Engineering and Well Completions

7.

Wellbore Stability and Drilling Problems

7.1.

Principles of Rock Mechanics

7.1.1.

7.1.2.

7.1.3.

Failure Criteria

7.2.

Mechanisms of Wellbore Instability

7.2.1.

Borehole Collapse

7.2.1.1.

7.2.1.2.

7.2.2.

Borehole Fracturing

7.2.2.1.

7.2.2.2.

7.3.

Common Drilling Problems

7.3.1.

Lost Circulation

7.3.1.1.

Causes and Detection

7.3.1.2.

Lost Circulation Materials

7.3.2.

7.3.2.1.

Mechanical Sticking

7.3.2.1.1.

7.3.2.1.2.

7.3.2.2.

Differential Sticking

7.3.2.2.1.

7.3.2.2.2.

7.3.3.

Hole Cleaning Issues

7.3.3.1.

Factors Affecting Hole Cleaning

7.3.3.2.

Remedial Actions

7.3.4.

Equipment Failure

7.3.4.1.

Drill String Failures

7.3.4.2.

Surface Equipment Failures

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6. Drilling Operations and Procedures

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8. Well Control