NAICS 213112:
Support Activities for Oil and Gas Operations

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.

Logging wells on a contract basisCleaning wells on a contract basisOil well logging on a contract basis+5 examples

Oil sampling services on a contract basisPumping oil and gas wells on a contract basisSwabbing oil or gas wells on a contract basisHydraulic fracturing wells on a contract basisServicing oil and gas wells on a contract basis

Matching SIC code: 1382 Oil and Gas Field Exploration Services (also 1389 Oil and Gas Field Services, Not Elsewhere Classified)

Where it sits

21Mining, Quarrying, and Oil and Gas ExtractionSector
213Support Activities for MiningSubsector
2131Support Activities for MiningIndustry group
21311Support Activities for MiningNAICS industry
213112Support Activities for Oil and Gas OperationsNational industry

Largest companies with NAICS 213112

Updated Nov 9, 2026

Rank	Company	Headquarters	Employees
1	SLBslb.com	Houston, US	83K
2	Baker Hughesbakerhughes.com	Houston, US	68K
3	Halliburtonhalliburton.com	Houston, US	61K
4	Oceaneeringoceaneering.com	Houston, US	13K
5	Exproexpro.com	Houston, US	9K
6	NESRnesr.com	Houston, US	5.8K
7	ChampionXchampionx.com	Spring, US	3.2K
8	Superior Energy Servicessuperiorenergy.com	Houston, US	3K
9	Core Laboratoriescorelab.com	Houston, US	2.7K
10	Key Energy Serviceskeyenergy.com	Houston, US	2.7K

Not this code?

Similar activities the Census classifies elsewhere.

2111Oil and Gas ExtractionOperating oil and gas field properties on a contract or fee basis
541360Geophysical Surveying and Mapping ServicesPerforming geophysical surveying and mapping services for oil and gas on a contract or fee basis
237120Oil and Gas Pipeline and Related Structures ConstructionOil and gas pipeline and related structures construction and repair
541990All Other Professional, Scientific, and Technical ServicesInspecting pipelines (i.e., visual)

Questions about NAICS 213112

Which businesses use NAICS 213112?

Logging wells on a contract basis, cleaning wells on a contract basis and oil well logging on a contract basis, and similar businesses in the Mining, Quarrying, and Oil and Gas Extraction sector. This U.S.

What SIC code matches NAICS 213112?

SIC 1382, Oil and Gas Field Exploration Services; SIC 1389, Oil and Gas Field Services, Not Elsewhere Classified, from the US Census Bureau's concordance between the two systems.

How many companies have NAICS 213112?

6,556 companies with a website carry NAICS 213112 as their primary code in Crustdata's data, worldwide.

Find any company's NAICS codeType a company name or website and get its codes with their titles.

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Code titles, definitions, examples and SIC matches: NAICS 2022 and the Census concordances, US Census Bureau. Company counts and lists: Crustdata, companies with a website, each by its primary code, updated weekly. Employee counts are estimates.