WITSML - Wellbore Geometry Component Schema. This defines the "fixed" components in a wellbore. It does not define the "transient" drilling strings or the "hanging" production components. Type of fixed component. Measured depth at Top of Interval. Measured depth at bottom of the section. True vertical depth at top of the section. True vertical depth at bottom of the section. Inner diameter. Outer diameter - Only for casings and risers. Weight per unit length for casing sections. Material grade for the tubular section. Curved conductor? Values are "true" (or "1") and "false" (or "0"). Maximum diameter that can pass through. Friction factor. Unique identifier for the wellbore geometry section.