> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/213111/ # NAICS code 213111: Drilling Oil and Gas Wells The companies classified under NAICS 213111, where they are based, how big they are and how the code maps to SIC. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** NAICS 213111 is the code for Drilling Oil and Gas Wells, in sector 21: Mining, Quarrying, and Oil and Gas Extraction. The companies counted under it are mostly small: 67% have 200 or fewer employees, and 66% are headquartered in the United States. ## What is NAICS 213111? NAICS 213111 is the code for Drilling Oil and Gas Wells. It belongs to sector 21: Mining, Quarrying, and Oil and Gas Extraction. NAICS, the North American Industry Classification System, is the standard U.S. government agencies use to sort businesses by what they mainly do, and each digit narrows the category. Most of the companies counted also carry SIC 1381, Oil and gas well drilling, in the older SIC system (78%). NAICS is a North American system, so companies outside the US, Canada and Mexico are placed in it by classification. - 34% of the companies counted have 50 or fewer employees, and the middle one is in the 51 to 200 range. - The largest group is headquartered in the United States (66%). Within the US, Texas is the biggest state (53%). - Most were founded in the 2000s (38%), then the 2010s (23%). **Figure: How NAICS 213111 is built.** The code 213111 split into its parts: sector 21, then subsector, industry group, NAICS industry and U.S. industry. *The six digits of NAICS 213111. Each digit narrows the category.* ## Which companies are classified under NAICS 213111? The biggest by headcount range include Tecpetrol, Precision Drilling, Abraj Energy Services, Aos Orwell and Michels Canada. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | Precision Drilling | Calgary, Canada | 5,001 to 10,000 | | Abraj Energy Services | Muscat, Oman | 1,001 to 5,000 | | Michels Canada | Nisku, Canada | 1,001 to 5,000 | | Alshawamikh Oil Services | Muscat, Oman | 1,001 to 5,000 | | Seplat Energy | Lagos, Nigeria | 501 to 1,000 | | Arc Resources | Calgary, Canada | 501 to 1,000 | | Certarus | Houston, TX | 501 to 1,000 | | Pdc Energy | Denver, CO | 501 to 1,000 | | Jindal Drilling & Industries | Bandra East Mumbai, India | 501 to 1,000 | | Aes Drilling Fluids | Houston, TX | 501 to 1,000 | | Akita Drilling | Calgary, Canada | 501 to 1,000 | | Enterprise Offshore Drilling | Houston, TX | 501 to 1,000 | | Clearwell Dynamics | San Antonio, TX | 501 to 1,000 | | Candix Engineering Nigeria | Port Harcourt, Nigeria | 501 to 1,000 | | Antero Resources | Denver, CO | 201 to 500 | | Marine Platforms | Victoria Island Lagos, Nigeria | 201 to 500 | | Civitas Resources | Denver, CO | 201 to 500 | | Gtc Oilfield Services | Ahmedabad, India | 201 to 500 | | Independence Contract Drilling | Houston, TX | 201 to 500 | | Predator Drilling | Red Deer, Canada | 201 to 500 | | Elite Drilling | Bangkok, Thailand | 201 to 500 | | Mb Well Services | Salzwedel, Germany | 201 to 500 | | Treeline Well Services | Calgary, Canada | 201 to 500 | | Evertson International | Missouri City., TX | 201 to 500 | | The Gel Group | Charleston, SC | 201 to 500 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Where are NAICS 213111 companies based? The largest groups are headquartered in the United States (66%), Canada (15%) and Oman (5%). **Figure: Where companies in NAICS 213111 are based.** Bars for the share of counted companies in NAICS 213111 headquartered in each country: United States 66%, Canada 15%, Oman 5%, India 4%, Nigeria 4%. *Share of counted companies in NAICS 213111 by headquarters country.* Within the United States, Texas (53%), Colorado (12%) and Pennsylvania (8%) lead. **Figure: US headquarters of companies in NAICS 213111, by state.** A tile map of the United States shaded by the share of counted US companies in NAICS 213111 headquartered in each state. The largest are Texas 53%, Colorado 12%, Pennsylvania 8%. *Share of counted US companies in NAICS 213111 by headquarters state. The three largest states are outlined.* ## How big are the companies counted for NAICS 213111? 34% of them have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. **Figure: Size of companies in NAICS 213111.** Seven columns for the share of counted companies in NAICS 213111 in each employee range: 11 to 50 34%, 51 to 200 32%, 201 to 500 14%, 501 to 1,000 13%, 1,001 to 5,000 4%, 5,001 to 10,000 2%, 10,001+ 0%. *Share of counted companies in NAICS 213111 in each employee range.* ## How old are NAICS 213111 companies? Most were founded in the 2000s (38%), then the 2010s (23%). **Figure: When companies in NAICS 213111 were founded.** Eight columns for the share of counted companies in NAICS 213111 founded in each era: Before 1960 2%, 1960s 3%, 1970s 3%, 1980s 11%, 1990s 17%, 2000s 38%, 2010s 23%, 2020s 3%. *Share of counted companies in NAICS 213111 by the era they were founded in, for the ones that list a founding year.* ## How NAICS 213111 compares - 34% of companies in NAICS 213111 have 50 or fewer employees, against 60% across all NAICS codes on this site. - Texas holds 53% of the US companies here, against 8% across all NAICS codes on this site. ## How do NAICS 213111 companies describe themselves? A code is assigned by classification, and a company does not choose its own, so the label a company uses for itself can differ. The most common labels here are Oil and Gas (82%), Construction (6%) and Environmental Services (4%). **Figure: How companies in NAICS 213111 describe themselves.** Bars for the share of counted companies in NAICS 213111 that give each industry on their public profile: Oil and Gas 82%, Construction 6%, Environmental Services 4%. *Share of counted companies in NAICS 213111 by the industry they list on their public profile.* ## NAICS 213111 and the SIC system NAICS replaced SIC in 1997, but the two do not line up one to one: companies filed under one NAICS code can carry several SIC codes. These are the ones seen most. | Code | Title | Share of counted | | --- | --- | --- | | SIC 1381 | Oil and gas well drilling | 78% | | [SIC 1382](https://enrich.chat/sic/1382/) | Oil and gas exploration services | 4% | | [SIC 1389](https://enrich.chat/sic/1389/) | Oil and gas field services | 4% | | SIC 1623 | Water, sewer and utility construction | 3% | | SIC 8711 | Engineering services | 3% | | [SIC 1311](https://enrich.chat/naics/211120/) | Crude petroleum and natural gas production | 2% | ## Where NAICS codes come from NAICS is maintained by the U.S. Census Bureau with Canada and Mexico and revised every five years; the current edition is NAICS 2022. To check exactly what a code includes, search the [official NAICS index](https://www.census.gov/naics/) or read the Census Bureau's [guide to understanding NAICS](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html). Pick a code by what a company mostly does, not by who it sells to. ## How do you reach the people at NAICS 213111 companies? The people to talk to are usually operations, procurement and finance leaders. You can build the list from this code in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 213111 (Drilling Oil and Gas Wells) ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the operations, procurement and finance leaders at companies with NAICS code 213111, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Others in sector 21: [NAICS 211120: Crude Petroleum Extraction](https://enrich.chat/naics/211120/) ## Frequently asked questions ### What is NAICS code 213111? NAICS 213111 is the code for Drilling Oil and Gas Wells, in sector 21: Mining, Quarrying, and Oil and Gas Extraction. ### What is the SIC code for NAICS 213111 (Drilling Oil and Gas Wells)? 78% of the companies counted carry SIC 1381 (Oil and gas well drilling), but the two systems do not map one to one. ### Which companies are classified under NAICS 213111? The biggest by headcount range include Tecpetrol, Precision Drilling, Abraj Energy Services, Aos Orwell and Michels Canada. The page lists 25 with links to their profiles where we have them. ### Where are NAICS 213111 companies based? The largest groups are headquartered in the United States (66%), Canada (15%) and Oman (5%). ### How big are the companies in NAICS 213111? 34% have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. ### How do I find a company's NAICS code? Search the official NAICS index at the U.S. Census Bureau for the code that matches what the company mostly does. Public companies in the US also list a SIC code in their SEC EDGAR profile. ## Try this prompt Find the people at NAICS 213111 companies ```text Use www.enrich.chat to find the operations, procurement and finance leaders at companies with NAICS code 213111, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)