A large fan installed on a drilling rig to blow insects away from the work area.

A mechanical slope indicator that consists of a ball rolling on a calibrated surface within a liquid filled enclosure that gives a visual indication of the […]

A tubular device that, when lowered to a selected depth within a well, fires bullets through the casing to provide holes through which the formation fluids […]

A United States agency that manages the nation’s natural gas, oil and other mineral resources on the outer continental shelf (OCS).