211: Oil and Gas Extraction
Industries in the Oil and Gas Extraction subsector operate and/or
develop oil and gas field properties. Such activities may include
exploration for crude petroleum and natural gas; drilling, completing,
and equipping wells; operating separators, emulsion breakers, desilting
equipment, and field gathering lines for crude petroleum; and all other
activities in the preparation of oil and gas up to the point of
shipment from the producing property. This subsector includes the
production of crude petroleum, the mining and extraction of oil from
oil shale and oil sands, and the production of natural gas and recovery
of hydrocarbon liquids.
Establishments in this subsector include those that operate oil and gas
wells on their own account or for others on a contract or fee basis.
Establishments primarily engaged in providing support services, on a
fee or contract basis, required for the drilling or operation of oil
and gas wells (except geophysical surveying and mapping) are classified
in Subsector 213, Support Activities for Mining.