NAICS Code 213112 — Support Activities for Oil and Gas Operations

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 5 national industries under 21311 (Support Activities for Mining).

Code	213112
Title	Support Activities for Oil and Gas Operations
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$47 million in average annual receipts

Official definition (2022 NAICS)

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.

Is a business under 213112 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 213112 qualifies as a small business if it does not exceed $47 million in average annual receipts. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — receipts are averaged over the latest 5 fiscal years.

Where 213112 sits in the hierarchy

Level	Code	Title
Sector	21	Mining, Quarrying, and Oil and Gas Extraction
Subsector	213	Support Activities for Mining
Industry Group	2131	Support Activities for Mining
NAICS Industry	21311	Support Activities for Mining
National Industry	213112	Support Activities for Oil and Gas Operations

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
1382	Oil and Gas Field Exploration Services
1389	Oil and Gas Field Services, Not Elsewhere Classified

Related National Industry codes

• 213111 — Drilling Oil and Gas Wells
• 213113 — Support Activities for Coal Mining
• 213114 — Support Activities for Metal Mining
• 213115 — Support Activities for Nonmetallic Minerals (except Fuels) Mining

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.