The term 'Drilling Outfit' is a job description for a RIG, which is a three letter acronym. A RIG is a large structure with equipment used to drill and explore for oil and gas underground. It is typically composed of a derrick, substructure, and drilling equipment. The derrick is the tall structure that supports the drill string and hoisting equipment, while the substructure supports the derrick and provides a platform for the RIG floor. The drilling equipment includes the pumps, motors, and other tools necessary to drill the well.