The term 'OIL-DRILLING SETUP' is a job description for a RIG, which is a three-letter acronym for a drilling apparatus. This apparatus is used to drill into the ground in order to extract oil and other resources. It is composed of several components, such as a derrick, drill string, and mud pumps, which are all necessary for the successful operation of the RIG. The setup also includes a variety of safety measures to ensure the safety of workers and the environment.