- Construction, repair, and dismantling services (1980)
- Building oil and gas well foundations on site (56)
- Derrick building, repairing, and dismantling (10)
- Excavating slush pits and cellars (147)
- Grading oil and gas well foundations (23)
- Lease tanks, oil field: erecting, cleaning, and repairing (116)
- Oil and gas wells: building, repairing and dismantling (322)
- Well plugging and abandoning, oil and gas (58)
- Testing, measuring, surveying, and analysis services (504)
- Detection and analysis service, gas (45)
- Measurement of well flow rates, oil and gas (79)
- Oil sampling service for oil companies (73)
- Pipe testing, oil field service (172)
- Surveying wells (41)
- Bailing, cleaning, swabbing, and treating of wells (99)
- Acidizing wells (79)
- Bailing wells (7)
- Chemically treating wells (37)
- Cleaning wells (37)
- Swabbing wells (27)
- Cementing oil and gas well casings (266)
- Fire fighting, oil and gas field (36)
- Fishing for tools, oil and gas field (48)
- Gas compressing (natural gas) at the fields (124)
- Gas field services, nec (393)
- Haulage, oil field (274)
- Hot shot service (96)
- Hydraulic fracturing wells (17)
- Impounding and storing salt water, oil and gas field (35)
- Mud service, oil field drilling (189)
- Oil consultants (1191)
- Oil field services, nec (5966)
- Perforating well casings (56)
- Processing service, gas (67)
- Pumping of oil and gas wells (428)
- Removal of condensate gasoline from field (gathering) lines (125)
- Roustabout service (569)
- Running, cutting, and pulling casings, tubes and rods (37)
- Servicing oil and gas wells (788)
- Well logging (237)
