213111 — Drilling Oil and Gas Wells
Description
This U.S. industry comprises establishments primarily engaged in drilling oil and gas wells for others on a contract or fee basis. This industry includes contractors that specialize in spudding in, drilling in, redrilling, and directional drilling (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Performing exploration (except geophysical surveying and mapping) services for oil and gas on a contract
- or fee basis--are classified in U.S. Industry 213112, Support Activities for Oil and Gas Operations; and
- Performing geophysical surveying and mapping services for oil and gas on a contract or fee basis--are
- classified in Industry 541360, Geophysical Surveying and Mapping Services.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 1381 - Drilling Oil and Gas Wells (via SIC1987:1381→NAICS1997:213111→2002:213111→2007:213111→2012:213111→2017:213111→2022:213111)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 3820 — Mining, Rock Drilling, Earth Boring, and Related Equipment
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 213111 valid in 2022? ▾
Yes, 213111 is a valid 6-digit 2022 NAICS national industry code representing 'Drilling Oil and Gas Wells' under Sector 21 in the official classification index.
What is the SBA size standard for NAICS code 213111? ▾
The Small Business Administration (SBA) has established a small business size standard of 1,000 employees for NAICS code 213111 (Drilling Oil and Gas Wells), calculated based on employees.
What is the legacy SIC equivalent for NAICS 213111? ▾
According to official Census Bureau concordance tables, NAICS code 213111 (Drilling Oil and Gas Wells) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 1381 - Drilling Oil and Gas Wells.
Related Pages & Tools
Further regulatory reference links for NAICS code 213111:
- Sector 21 Directory Hub — List of related industries in the Mining, Quarrying, and Oil and Gas Extraction sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 213111 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Drilling Oil and Gas Wells).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.