This U.S. industry comprises establishments primarily engaged in performing support activities, on a contract or fee basis, for oil and gas operations (except geophysical surveying and mapping, site preparation, construction, and transportation activities). Services included are exploration; excavating slush pits and cellars, 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 primarily engaged in--

Including:

• Acidizing oil and gas field wells on a contract basis
• Building oil and gas well foundations on a contract basis
• Building, erecting, repairing, and dismantling oil and gas field rigs and derricks on a contract basis
• Cementing oil and gas well casings on a contract basis
• Chemically treating oil and gas wells (e.g., acidizing, bailing, swabbing) on a contract basis
• Cleaning oil and gas field lease tanks on a contract basis
• Cleaning out (e.g., bailing out, steam cleaning, swabbing) wells on a contract basis
• Cleaning wells on a contract basis
• Cleaning, repairing, and dismantling oil and gas field lease tanks on a contract basis
• Contract services (except geophysical surveying and mapping, site preparation, construction, and transportation activities) for oil and gas fields
• Core cutting in oil and gas wells, on a contract basis
• Core drilling, exploration services, oil and gas field
• Cutting cores in oil and gas wells on a contract basis
• Derrick building, repairing, and dismantling at oil and gas fields on a contract basis
• Dismantling of oil well rigs on a contract basis
• Drilling rat holes and mouse holes at oil and gas fields on a contract basis
• Drilling shot holes at oil and gas fields on a contract basis
• Drilling site preparation at oil and gas fields on a contract basis
• Drill-stem testing in oil, gas, dry, and service well drilling on a contract basis
• Excavating mud pits, slush pits, and cellars at oil and gas fields on a contract basis
• Exploration services for oil and gas (except geophysical surveying and mapping) on a contract basis
• Fishing for tools at oil and gas fields on a contract basis
• Gas well rig building, repairing, and dismantling on a contract basis
• Gas, compressing natural, in the field on a contract basis
• Geological exploration (except surveying) for oil and gas on a contract basis
• Geophysical exploration (except surveying) for oil and gas on a contract basis
• Hard banding oil and gas field service on a contract basis
• Hot oil treating of oil field tanks on a contract basis
• Hot shot oil field services (on- and off-road) on a contract basis
• Hydraulic fracturing wells on a contract basis
• Impounding and storing salt water in connection with petroleum production
• Installing production equipment at the oil or gas field on a contract basis
• Lease tank cleaning and repairing on a contract basis
• Logging wells on a contract basis
• Mouse hole and rat hole drilling at oil and gas fields on a contract basis
• Mud service for oil field drilling on a contract basis
• Oil and gas field services on a contract basis (except geophysical surveying and mapping, site preparation, construction, and transportation activities)
• Oil field exploration (except surveying) on a contract basis
• Oil sampling services on a contract basis
• Oil well logging on a contract basis
• Oil well rig building, repairing, and dismantling, on a contract basis
• Operating condensate gasoline field gathering lines on a contract basis
• Paraffin services, oil and gas field, on a contract basis
• Perforating oil and gas well casings on a contract basis
• Pipe testing services, oil and gas field, on a contract basis
• Plugging and abandoning wells on a contract basis
• Preparation of oil and gas field drilling sites (except site preparation and related construction contractor activities) on a contract basis
• Pulling oil and gas field casings, tubes, or rods on a contract basis
• Pumping oil and gas wells on a contract basis
• Rathole and mousehole drilling at oil and gas fields on a contract basis
• Rig skidding, oil and gas field, on a contract basis
• Roustabout mining services, on a contract basis
• Salt water disposal systems, oil and gas field, on a contract basis
• Sandblasting pipelines on lease, oil and gas field, on a contract basis
• Seismograph exploration (except surveying) for oil and gas on a contract basis
• Servicing oil and gas wells on a contract basis
• Shot hole drilling, oil and gas field, on a contract basis
• Skidding of rigs, oil and gas field, on a contract basis
• Slush pits and cellars, excavation of, on a contract basis
• Steam cleaning oil and gas wells on a contract basis
• Stratigraphic drilling, oil and gas field exploration on a contract basis
• Surveying (except seismographic) oil or gas wells on a contract basis
• Swabbing oil or gas wells on a contract basis
• Well casing running, cutting and pulling, oil and gas field on a contract basis
• Well logging, oil and gas field, on a contract basis
• Well plugging, oil and gas field, on a contract basis
• Well pumping, oil and gas field, on a contract basis
• Well servicing, oil and gas field, on a contract basis
• Well surveying, oil and gas field, on a contract basis
• Wireline services, oil and gas field, on a contract basis