Casing and tubing corrosion costs the oil industry billions of dollars annually - and this estimate does not include the cost of "lost oil" underground through corrosion-induced leakage and cross flow. Although early corrosion detection may allow preventive maintenance to reduce the risk of environmental damage and surface incidents (explosion, fire, leakage, and related consequences), many of the wells producing today were completed decades ago, when corrosion control and monitoring were not a primary concern. Even with today's technological advances, corrosion cannot be completely prevented. But corrosion can be controlled and minimized through proper planning, monitoring, and maintenance. The Schlumberger EM Pipe Scanner electromagnetic (EM) casing inspection provides the critical monitoring step for evaluating casing integrity by locating, identifying, and quantifying damage and corrosion.