Establishments primarily engaged in performing oil and gas field services, not elsewhere classified, for others on a contract or fee basis. Services included are excavating slush pits and cellars; gradings and building of foundations at well locations; well surveying; running, cutting, and pulling casings tubes, and rods; cementing wells; shooting wells; perforating well casings; acidizing and chemically treating wells; and cleaning out, bailing, and swabbing wells. Establishments which have complete responsibility for operating oil and gas wells for others on a contract or fee basis are classified according to the product extracted rather than as oil and gas field services. Establishments primarily engaged in hauling oil and gas field supplies and equipment are classified in Division E, Transportation and Public Utilities. Establishments primarily engaged in oil and gas field machine shop work are classified in Manufacturing, Industry 3599.

• Acidizing wells on a contract basis
• Bailing wells on a contract basis
• Building oil and gas well foundations on a contract basis
• Cementing oil and gas well casings on a contract basis
• Chemically treating wells on a contract basis
• Cleaning lease tanks, oil and gas field on a contract basis
• Cleaning wells on a contract basis
• Derrick building, repairing, and dismantling oil and gas-on a contract
• Dismantling of oil well rigs (oil field service) on a contract basis
• Erecting lease tanks, oil and gas field on a contract basis
• Excavating slush pits and cellars on a contract basis
• Fishing for tools, oil and gas field on a contract basis
• Gas compressing natural gas at the field on a contract basis
• Gas well rig building, repairing, and dismantling on a contract basis
• Grading oil and gas well foundations on a contract basis
• Hard banding service on a contract basis
• Hot oil treating of oil field tanks on a contract basis
• Hot shot service: on a contract basis
• Hydraulic fracturing wells on a contract basis
• Impounding and storing salt water in connection with petroleum
• Lease tanks, oil and gas field: erecting, cleaning, and repairing-on a
• Logging wells on a contract basis
• Mud service, oil field drilling: on a contract basis
• Oil sampling service for oil companies on a contract basis
• Oil well logging on a contract basis
• Perforating well casings on a contract basis
• Pipe testing service, oil and gas field: on a contract basis
• Plugging and abandoning wells on a contract basis
• Pumping of oil and gas wells on a contract basis
• Removal of condensate gasoline from field gathering lines: on a
• Roustabout service: on a contract basis
• Running, cutting, and pulling casings, tubes, and rods: oil and
• Servicing oil and gas wells on a contract basis
• Shooting wells on a contract basis
• Shot-hole drilling service, oil and gas field: on a contract basis
• Surveying wells on a contract basis, except seismographic
• Swabbing wells: on a contract basis