Company lists · Data refreshed September 2026

Top 25 Oil field services companies worldwide

Name: Oil field services companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 8,399 companies tracked

RevenueBase identified 8,399 company matches for oil field services companies worldwide as of September 2026 and tracks 594,823 professional contacts across them, including 127,411 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for oil field services companies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 2026. Country and city lists for oil field services companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 20, 2026 How this list was built

8,399Companies

594,823Contacts tracked

127,411Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest oil field services companies worldwide

Ranked by team size

Top 25 of 8,399 company matches for oil field services companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	SLB	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	10001+	76,561 contacts →
	Exact match “SLB is a global technology company that has driven energy innovation for more than a century.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	Baker Hughes	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	10001+	61,166 contacts →
	Exact match “Baker Hughes (NASDAQ: BKR) is an energy technology company that provides solutions for energy and industrial customers worldwide.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3	Halliburton	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	10001+	53,380 contacts →
	Exact match “We collaborate and engineer solutions to maximize asset value for our customers.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4	Aker Solutions	Exact match	Fornebu, NorwayHQ recorded Sep 20, 2026	10001+	15,774 contacts →
	Exact match “Aker Solutions is a global engineering and technology company known for delivering complex energy projects with trusted quality and predictable results.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5	Transocean	Exact match	Zug, SwitzerlandHQ recorded Sep 20, 2026	1,001-5,000	10,068 contacts →
	Exact match “Transocean is a leading international provider of offshore contract drilling services for oil and gas wells.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6	EXPRO	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	5,001-10,000	6,466 contacts →
	Exact match “Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7	Nabors Industries	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	10001+	5,865 contacts →
	Exact match “Nabors Industries is a leading provider of advanced technology for the energy industry.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8	Noble Corporation	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	5,001-10,000	5,601 contacts →
	Exact match “Noble is a leading offshore drilling contractor for the oil and gas industry.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9	Seadrill	Exact match	Houston, United StatesHQ recorded Sep 20, 2026	1,001-5,000	4,845 contacts →
	Exact match “Seadrill is setting the standard in deepwater oil and gas drilling.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10	Cotemar	Exact match	Ciudad Del Carmen, MexicoHQ recorded Sep 20, 2026	5,001-10,000	4,138 contacts →
	Exact match “We are Mexican company specialized in services for the oil industry since 1979.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 20, 2026	1,001-5,000	3,932 contacts →
	Exact match “We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12	NESR	Exact match	Houston, United StatesHQ recorded Sep 20, 2026	5,001-10,000	3,683 contacts →
	Exact match “National Energy Services Reunited Corp.(NESR) was founded in 2017 as one of the largest national oilfield services providers in the MENA and Asia Pacific regions and was the first…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13	Boart Longyear	Exact match	West Valley City, UT, United StatesHQ recorded Sep 20, 2026	5,001-10,000	3,285 contacts →
	Exact match “Established in 1890, Boart Longyear is the world’s leading innovative provider of drilling services, manufacturer of productivity-driven drilling equipment and performance…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	ADES	Exact match	Al Khobar, Saudi ArabiaHQ recorded Sep 20, 2026	5,001-10,000	3,251 contacts →
	Exact match “ADES is a world-leading international provider of oil and gas drilling services.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	Valaris Limited	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	5,001-10,000	3,173 contacts →
	Exact match “We Are Valaris With decades of expertise and strategic commitment built on efficiency, capability and ingenuity, our sights are continually set toward a future built with purpose…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	1,001-5,000	2,755 contacts →
	Exact match “Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Precision Drilling	Exact match	Calgary, AB, CanadaHQ recorded Sep 20, 2026	5,001-10,000	2,471 contacts →
	Exact match “Precision is a leading provider of safe and High Performance, High-Value services to the oil and gas industry.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	OCYAN	Exact match	Rio De Janeiro, BrazilHQ recorded Sep 20, 2026	1,001-5,000	2,427 contacts →
	Exact match “A OCYAN atua há décadas na prestação de serviços para o setor de óleo e gás upstream, estruturando suas operações em três frentes de atuação.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	Archer	Exact match	Sandnes, NorwayHQ recorded Sep 20, 2026	5,001-10,000	2,373 contacts →
	Exact match “Archer is a company providing drilling and well services to the global energy industry.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20	Patterson-Uti	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	10001+	2,317 contacts →
	Exact match “Patterson-UTI is a leading provider of drilling and completion services to oil and natural gas exploration and production companies in the United States and other select…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21	Taqa Industrialization & Energy Services Company	Exact match	Dhahran, Saudi ArabiaHQ recorded Sep 20, 2026	5,001-10,000	2,250 contacts →
	Exact match “TAQA is an international company that offers leading well solutions for the energy industry and is creating value and opportunity for all its stakeholders.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22	Oilserv	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 20, 2026	1,001-5,000	2,249 contacts →
	Exact match “OiLSERV is a provider of an expanding range of oilfield services, including well logging, well testing, production enhancement, drilling services, surface production management…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23	OIL States International	Exact match	Houston, TX, United StatesHQ recorded Sep 20, 2026	5,001-10,000	2,215 contacts →
	Exact match “Oil States International, Inc.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24	Ensign Energy Services	Exact match	Calgary, AB, CanadaHQ recorded Sep 20, 2026	1,001-5,000	2,176 contacts →
	Exact match “Ensign Energy Services Inc.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25	Egyptian Drilling Company EDC	Exact match	Cairo, EgyptHQ recorded Sep 20, 2026	5,001-10,000	2,122 contacts →
	Exact match “EDC is one of the leading drilling contractors in Egypt and the MENA region; established in 1976 in partnership with Maersk Drilling, EDC is now 100% owned by Egyptian General…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “oil field services companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 8,399 oil field services companies worldwide

See the full list, filter by size, metro and specialty, and access 127,411 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Oil field services companies worldwide at a glance

As of Sep 20, 2026

21.4%Verified-email coverage

70.8Average contacts per company

11-50Median size (employees)

4.0%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

2,197

11-50

2,936

51-200

1,877

201-500

695

501-1,000

294

1,001-5,000

288

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for oil field services companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil field services companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 127,411 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Oil field services companies by location

46 lists · largest first

Every Oil field services companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “oil field services companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil field services companies are there worldwide?

RevenueBase identified 8,399 company matches for oil field services companies worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

SLB tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most oil field services companies?

The United States leads with 2,229 companies, followed by Nigeria (520) and Canada (518). Every oil field services companies list by country and city is linked on this page.

Which city has the most oil field services companies?

Houston leads with 339 company records, followed by Port Harcourt (176) and Calgary (167).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 127,411 professional contacts with verified work emails tracked across these 8,399 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 8,399 oil field services companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.