The Baker Hughes Oil Rig Count is the United States oil subset of the Baker Hughes North American Rotary Rig Count.
Baker Hughes Company publishes it as a service to the petroleum industry since 1944, when Hughes Tool Company began weekly counts. A monthly international count followed in 1975.
The census covers every rotary rig working in oil or gas on land and offshore, with no sample. Field representatives contact every operating rig in the district, whatever drill bit it uses. It does not measure output, jobs or prices, and it leaves out idle, cable-tool and non-rotary rigs. The oil label reflects the operator's choice at permit time, not measured output.