See Drilling rig (petroleum) for a diagram of a drilling rig. The term is commonly used in the context of an oil well drilling rig. The drilling rig requires water to operate. This article lists the main components of a petroleum onshore drilling rig. A drawworks is the primary hoisting machinery component of a rotary drilling rig. A major blow-out occurred, which ignited and destroyed the drilling rig. An example of this is erecting the mast of a large mobile drilling rig. This includes the oil production plant, the accommodation block and the drilling rig. A bottom hole assembly (BHA) is a component of a drilling rig. In 2017, an employee went missing on the Noble Lloyd Noble drilling rig. They conducted two secret tests on a drilling rig in Goose Creek, Texas. Drillers may sink a borehole using a drilling rig or a hand-operated rig.