WITSML - Rig Pit Component Schema Relative pit number of all pits on the rig. One-based. Date and time of installation. Removal date and time. Maximum pit capacity. Contractor/owner. The type of pit. Flag to indicate if Pit is part of the active system. Values are "true" (or "1") and "false" (or "0"). An identification tag for the pit. A serial number is a type of identification tag however some tags contain many pieces of information. This structure just identifies the tag and does not describe the contents. Unique identifier for the pit.