- Building oil and gas well foundations on site (44)
- Derrick building, repairing, and dismantling (4)
- Excavating slush pits and cellars (128)
- Grading oil and gas well foundations (7)
- Lease tanks, oil field: erecting, cleaning, and repairing (70)
- Oil and gas wells: building, repairing and dismantling (66)
- Well plugging and abandoning, oil and gas (3)
- Detection and analysis service, gas (32)
- Measurement of well flow rates, oil and gas (28)
- Oil sampling service for oil companies (16)
- Pipe testing, oil field service (90)
- Surveying wells (37)
- Acidizing wells (5)
- Bailing wells (3)
- Chemically treating wells (6)
- Cleaning wells (26)
- Swabbing wells (6)
- Cementing oil and gas well casings (23)
- Fire fighting, oil and gas field (16)
- Fishing for tools, oil and gas field (7)
- Gas compressing (natural gas) at the fields (18)
- Gas field services, nec (89)
- Haulage, oil field (268)
- Hot shot service (26)
- Hydraulic fracturing wells (3)
- Impounding and storing salt water, oil and gas field (9)
- Mud service, oil field drilling (15)
- Oil consultants (516)
- Oil field services, nec (3048)
- Perforating well casings (13)
- Processing service, gas (37)
- Pumping of oil and gas wells (29)
- Removal of condensate gasoline from field (gathering) lines (24)
- Roustabout service (15)
- Running, cutting, and pulling casings, tubes and rods (14)
- Servicing oil and gas wells (367)
- Well logging (28)
