Company lists · Data refreshed November 2026

Top 25 Oil and gas services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 4, 2026 20,418 companies tracked

RevenueBase identified 20,418 company matches for oil and gas services worldwide as of November 2026 and tracks 1,099,025 professional contacts across them, including 191,362 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for oil and gas services 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 November 4, 2026. Country and city lists for oil and gas services 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 Nov 4, 2026 How this list was built

20,418Companies

1,099,025Contacts tracked

191,362Verified emails

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The 25 largest oil and gas services worldwide

Ranked by team size

Top 25 of 20,418 company matches for oil and gas services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 4, 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 Nov 4, 2026	10001+	82,942 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 · Nov 4, 2026 · View company records in RevenueBase
2	Halliburton	Exact match	Houston, United StatesHQ recorded Nov 4, 2026	10001+	58,281 contacts →
	Exact match “We collaborate and engineer solutions to maximize asset value for our customers.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
3	Weatherford	Exact match	Dublin, IrelandHQ recorded Nov 4, 2026	10001+	30,754 contacts →
	Exact match “Weatherford International plc (Nasdaq: WFRD) is a leading global energy services company.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
4	NOV	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	10001+	30,477 contacts →
	Exact match “NOV delivers technology-driven solutions to empower the global energy industry.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
5	Petronas	Exact match	Kuala Lumpur, MalaysiaHQ recorded Nov 4, 2026	10001+	29,793 contacts →
	Exact match “Petroliam Nasional Berhad (PETRONAS) is a leading global energy company committed to powering society’s progress in a responsible and sustainable manner.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
6	Aker Solutions	Exact match	Fornebu, NorwayHQ recorded Nov 4, 2026	10001+	16,534 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 · Nov 4, 2026 · View company records in RevenueBase
7	Petrofac	Exact match	London, United KingdomHQ recorded Nov 4, 2026	5,001-10,000	13,144 contacts →
	Exact match “We are a leading international service provider to the energy industry, with a diverse client portfolio including many of the world’s leading energy companies.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
8	Technip Former Company	Exact match	United KingdomHQ recorded Nov 4, 2026	10001+	12,130 contacts →
	Exact match “Technip is a former company that was separated into two independent companies: TechnipFMC and Technip Energies, which now operate with no capital ties.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
9	EXPRO	Exact match	Houston, United StatesHQ recorded Nov 4, 2026	5,001-10,000	6,924 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 · Nov 4, 2026 · View company records in RevenueBase
10	Nabors Industries	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	10001+	6,404 contacts →
	Exact match “Nabors Industries is a leading provider of advanced technology for the energy industry.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
11	Noble Corporation	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	5,001-10,000	6,077 contacts →
	Exact match “Noble is a leading offshore drilling contractor for the oil and gas industry.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
12	Perenco	Exact match	Londres, United KingdomHQ recorded Nov 4, 2026	5,001-10,000	5,669 contacts →
	Exact match “Founded over thirty years ago, Perenco is an independent hydrocarbon producer involved in the entire lifecycle of projects, from exploration to decommissioning.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
13	Bonatti	Exact match	Parma, United StatesHQ recorded Nov 4, 2026	5,001-10,000	5,460 contacts →
	Exact match “Bonatti is an International Contractor providing services to energy industry with over 75 years of experience.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
14	Aesa A-Evangelista SA	Exact match	Canning, IndiaHQ recorded Nov 4, 2026	5,001-10,000	5,428 contacts →
	Exact match “Since 1948 we specialize in projects for the energy industry.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
15	Seadrill	Exact match	Houston, United StatesHQ recorded Nov 4, 2026	1,001-5,000	5,319 contacts →
	Exact match “Seadrill is setting the standard in deepwater oil and gas drilling.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
16	Seatrium	Exact match	United StatesHQ recorded Nov 4, 2026	10001+	5,162 contacts →
	Exact match “A Premier Global Player with Deep Engineering Expertise in the offshore, marine and energy industries Engineering our Future Together.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
17	Cotemar	Exact match	Ciudad Del Carmen, MexicoHQ recorded Nov 4, 2026	5,001-10,000	4,509 contacts →
	Exact match “We are Mexican company specialized in services for the oil industry since 1979.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
18	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Nov 4, 2026	1,001-5,000	4,263 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 · Nov 4, 2026 · View company records in RevenueBase
19	NESR	Exact match	Houston, United StatesHQ recorded Nov 4, 2026	5,001-10,000	3,989 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 · Nov 4, 2026 · View company records in RevenueBase
20	Infotec Brasil	Exact match	Rio De Janeiro, BrazilHQ recorded Nov 4, 2026	1,001-5,000	3,671 contacts →
	Exact match “Impulsionamos a eficiência em operações críticas de engenharia, manutenção e logística principalmente no setores de Óleo e Gás, Mineração, Siderurgia, Energia e Infraestrutura no…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
21	Ortec Group	Exact match	Aix-en-provence, FranceHQ recorded Nov 4, 2026	10001+	3,602 contacts →
	Exact match “En conjuguant depuis sa création audace et rigueur, le groupe Ortec est devenu aujourd’hui un des leaders des services à l’industrie, l’énergie et l’environnement.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
22	Altrad	Exact match	Montpellier, FranceHQ recorded Nov 4, 2026	10001+	3,588 contacts →
	Exact match “ALTRAD AT A GLANCE Altrad is a world leader in the provision of industrial services, generating high-added value solutions principally for the Energy, Power Generation, Oil & Gas…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
23	Valaris Limited	Exact match	Houston, United StatesHQ recorded Nov 4, 2026	5,001-10,000	3,352 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 · Nov 4, 2026 · View company records in RevenueBase
24	Expertise	Exact match	Al Jubail, Saudi ArabiaHQ recorded Nov 4, 2026	10001+	3,127 contacts →
	Exact match “Established in 2008 and headquartered in Al Jubail with operational offices across the kingdom, Expertise Company Ltd.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
25	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	1,001-5,000	2,991 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 · Nov 4, 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 and gas services”. 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 20,418 oil and gas services worldwide

See the full list, filter by size, metro and specialty, and access 191,362 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil and gas services worldwide at a glance

As of Nov 4, 2026

17.4%Verified-email coverage

53.8Average contacts per company

11-50Median size (employees)

3.6%Largest-city concentration · Houston

Nov 4, 2026Page data refreshed

Companies by employee count

1-10

5,987

11-50

7,171

51-200

4,117

201-500

1,548

501-1,000

660

1,001-5,000

599

5,001-10,000

107

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 and gas services are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil and gas services” 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 191,362 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 November 4, 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 and gas services by location

106 lists · largest first

Every Oil and gas services 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 and gas services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil and gas services are there worldwide?

RevenueBase identified 20,418 company matches for oil and gas services worldwide as of November 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 and gas services?

The United States leads with 4,104 companies, followed by Nigeria (1,342) and Canada (997). Every oil and gas services list by country and city is linked on this page.

Which city has the most oil and gas services?

Houston leads with 734 company records, followed by Port Harcourt (367) and Calgary (341).

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 191,362 professional contacts with verified work emails tracked across these 20,418 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 November 4, 2026.

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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.