Company lists · Data refreshed November 2026

Top 25 Oil and gas exploration services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 4, 2026 16,061 companies tracked

RevenueBase identified 16,061 company matches for oil and gas exploration services worldwide as of November 2026 and tracks 875,443 professional contacts across them, including 158,100 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 exploration 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 exploration 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

16,061Companies

875,443Contacts tracked

158,100Verified emails

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The 25 largest oil and gas exploration services worldwide

Ranked by team size

Top 25 of 16,061 company matches for oil and gas exploration 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	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
4	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
5	Petroleum Development Oman	Exact match	Muscat, OmanHQ recorded Nov 4, 2026	5,001-10,000	12,899 contacts →
	Exact match “We are the leading exploration and production company in the Sultanate of Oman that delivers the majority of the country's crude oil production and natural gas supply, but above…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
6	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
7	Transocean	Exact match	Zug, SwitzerlandHQ recorded Nov 4, 2026	1,001-5,000	11,020 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 · Nov 4, 2026 · View company records in RevenueBase
8	FUGRO	Exact match	Nootdorp, NetherlandsHQ recorded Nov 4, 2026	10001+	8,737 contacts →
	Exact match “We are the world’s leading Geo-data specialist, collecting and analysing comprehensive information about the Earth and the structures built upon it.” 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	Woodside Energy	Exact match	Perth, AustraliaHQ recorded Nov 4, 2026	1,001-5,000	6,114 contacts →
	Exact match “We aim to thrive through the global energy transition with a low-cost, lower-carbon, profitable, resilient and diversified portfolio.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
12	W&t Offshore Inc. Nyse WTI	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	n/a	5,544 contacts →
	Exact match “We are an independent oil and natural gas acquisition, exploitation and exploration company.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
13	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
14	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
15	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
16	PTTEP	Exact match	Chatuchak, ThailandHQ recorded Nov 4, 2026	1,001-5,000	4,105 contacts →
	Exact match “PTTEP conducts business in petroleum exploration, development, and production.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
17	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
18	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
19	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
20	Pluspetrol	Exact match	Caba, IndiaHQ recorded Nov 4, 2026	1,001-5,000	2,958 contacts →
	Exact match “Pluspetrol es una empresa privada de energía con más 45 años de experiencia en la exploración y producción de hidrocarburos.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
21	Shelf Drilling	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 4, 2026	1,001-5,000	2,887 contacts →
	Exact match “Shelf Drilling is a wholly owned subsidiary of ADES Holding Company, a leading international oil and gas drilling services provider.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
22	Precision Drilling	Exact match	Calgary, TX, CanadaHQ recorded Nov 4, 2026	5,001-10,000	2,730 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 · Nov 4, 2026 · View company records in RevenueBase
23	PT Surveyor Indonesia	Exact match	Jakarta Selatan, IndonesiaHQ recorded Nov 4, 2026	5,001-10,000	2,700 contacts →
	Exact match “Surveyor Indonesia didirikan pada tanggal 1 Agustus 1991.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
24	Patterson-Uti	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	10001+	2,552 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 · Nov 4, 2026 · View company records in RevenueBase
25	AFREN	Exact match	London, United KingdomHQ recorded Nov 4, 2026	n/a	2,497 contacts →
	Exact match “Afren is an independent oil and gas exploration and production company with a portfolio of 29 assets across 11 countries spanning the full cycle E&P value chain.” 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 exploration 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 16,061 oil and gas exploration services worldwide

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Oil and gas exploration services worldwide at a glance

As of Nov 4, 2026

18.1%Verified-email coverage

54.5Average contacts per company

11-50Median size (employees)

4.3%Largest-city concentration · Houston

Nov 4, 2026Page data refreshed

Companies by employee count

1-10

5,508

11-50

5,383

51-200

2,963

201-500

1,064

501-1,000

457

1,001-5,000

424

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 and gas exploration services are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil and gas exploration 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 158,100 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 exploration services by location

88 lists · largest first

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

How many oil and gas exploration services are there worldwide?

RevenueBase identified 16,061 company matches for oil and gas exploration 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 exploration services?

The United States leads with 3,395 companies, followed by Nigeria (1,051) and Canada (784). Every oil and gas exploration services list by country and city is linked on this page.

Which city has the most oil and gas exploration services?

Houston leads with 689 company records, followed by Calgary (326) and Port Harcourt (293).

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 158,100 professional contacts with verified work emails tracked across these 16,061 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.