NAICS 213112

Overview

The North American Industry Classification System (NAICS) is the federal standard for coding business establishments so agencies can collect, analyze, and publish statistics about the U.S. economy. Developed under the Office of Management and Budget with Canada and Mexico, it replaced the SIC in 1997 and is updated every five years; the most recent vintage is 2022. ¹

NAICS 213112 — Support Activities for Oil and Gas Operations — covers establishments that perform oil and gas field services for others on a contract or fee basis, excluding contract drilling. Examples include (non‑geophysical) exploration, site grading and foundation work at well locations, well surveying, casing and tubing work, cementing, shooting and perforating, acidizing and chemical treatments, and well cleanout and swabbing. It classifies upstream support services distinct from drilling and geophysical surveying. ²

See also on G2X:

• G2X — NAICS 213112 overview
• G2X — NAICS 213111 (Drilling Oil and Gas Wells)
• G2X — NAICS 541360 (Geophysical Surveying and Mapping Services)

What this NAICS covers

• Contract or fee‑based oil and gas field services other than drilling. ²
• Exploration activities for oil and gas (excluding geophysical surveying and mapping). ²
• Grading and building foundations at well locations; excavating slush pits and cellars. ²
• Well surveying, and running, cutting, and pulling casings, tubes, and rods. ²
• Well cementing, shooting, and perforating operations. ²
• Acidizing and other chemical treatments to stimulate wells. ²
• Cleaning out, bailing, and swabbing wells during operations or workovers. ²

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	213111	Drilling Oil and Gas Wells
NAICS	541360	Geophysical Surveying and Mapping Services
NAICS	237120	Oil and Gas Pipeline and Related Structures Construction
NAICS	238910	Site Preparation Contractors

Industry scope and boundaries

• Contract drilling is classified under 213111; field services other than drilling fall under 213112. ²
• Geophysical surveying and mapping services are excluded and classified in 541360. ²
• Oil and gas pipeline construction work is classified in 237120. ³
• Site preparation and related construction activities are classified in 238910. ³

Frequently asked questions

• What activities are included in NAICS 213112?

  • It includes contract or fee‑based oil and gas field services other than drilling: exploration (non‑geophysical), site grading at well locations, well surveying, casing/tubing work, cementing, shooting, perforating, acidizing/chemical treatments, and well cleanout or swabbing. ²

• How does 213112 differ from 213111?

  • 213111 covers contract drilling (spudding in, redrilling, directional drilling). 213112 covers the non‑drilling services that support well development and operations. ²

• Are geophysical surveys part of 213112?

  • No. Geophysical surveying and mapping for oil and gas is classified under 541360, not 213112. ²

• Do pipeline construction or site prep services fall under 213112?

  • No. Pipeline and related structures construction is in 237120, and site preparation contractors are in 238910. ³

• What is the current NAICS vintage and when is it being applied to data?

  • The current NAICS vintage is 2022. Census programs began publishing data on the 2022 basis with the 2022 Economic Census and plan full adoption across programs by the end of calendar year 2027. ⁴

Useful resources

• Census NAICS industry description for Support Activities for Oil and Gas Operations. ²
• Census guidance: Understanding NAICS (purpose, structure, updates). ¹
• Census implementation timeline for the 2022 NAICS vintage. ⁴

References

1. U.S. Census Bureau — About Industry (NAICS overview, OMB adoption in 1997, five‑year updates including 2022). https://www.census.gov/topics/employment/industry-occupation/about/industry.html
2. U.S. Census Bureau — NAICS Sector 21 (Support Activities for Mining; includes 213112 description and cross‑references). https://www.census.gov/naics/resources/archives/sect21.html
3. U.S. Census Bureau — NAICS 213112 (additional cross‑references to 237120 and 238910). https://www2.census.gov/econ2007/Reference_materials/htm%20files/213112.htm
4. U.S. Census Bureau — Implementation of the 2022 NAICS (timeline and program adoption). https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html