Company lists · Data refreshed September 2026

Top 25 Oil field consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 13,546 companies tracked

RevenueBase identified 13,546 company matches for oil field consulting firms worldwide as of September 2026 and tracks 439,671 professional contacts across them, including 77,552 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for oil field consulting firms 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 21, 2026. Country and city lists for oil field consulting firms 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 21, 2026 How this list was built

13,546Companies

439,671Contacts tracked

77,552Verified emails

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The 25 largest oil field consulting firms worldwide

Ranked by team size

Top 25 of 13,546 company matches for oil field consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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	Halliburton	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
2	Amec Foster Wheeler	Exact match	Aberdeen, United KingdomHQ recorded Sep 21, 2026	10001+	14,368 contacts →
	Exact match “Wood Group has combined with Amec Foster Wheeler to form a new global leader in the delivery of project, engineering and technical services to energy and industrial markets.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	EXPRO	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
4	Nabors Industries	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
5	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
6	NESR	Exact match	Houston, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
7	Ortec Group	Exact match	Aix-en-provence, FranceHQ recorded Sep 21, 2026	10001+	3,436 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 · Sep 21, 2026 · View company records in RevenueBase
8	ENPPI	Exact match	Nasr City 1, United StatesHQ recorded Sep 21, 2026	1,001-5,000	3,370 contacts →
	Exact match “Enppi is globally recognized as a major engineering, EPC main contractor, and management contractor, with decades of experience in onshore and offshore projects in the oil and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	ADES	Exact match	Al Khobar, Saudi ArabiaHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
10	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
11	Archer	Exact match	Sandnes, NorwayHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
12	Patterson-Uti	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
13	Oilserv	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
14	OIL States International	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	5,001-10,000	2,215 contacts →
	Exact match “Oil States International, Inc.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	SAN Antonio Internacional	Exact match	Comuna 1, ArgentinaHQ recorded Sep 21, 2026	1,001-5,000	2,064 contacts →
	Exact match “Somos la mayor prestadora de servicios de perforación de la Argentina y somos líderes en la prestación de servicios asociados al mantenimiento y optimización de los pozos de…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Sinopec International Petroleum Service Corporation	Exact match	北京市, ChinaHQ recorded Sep 21, 2026	10001+	1,952 contacts →
	Exact match “Sinopec International Petroleum Service Corporation SSC” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Superior Energy Services	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,938 contacts →
	Exact match “For oil & gas exploration and production companies worldwide, Superior Energy Services is an oilfield products and services company with global reach, financial stability and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Aarvi Encon	Exact match	Mumbai, IndiaHQ recorded Sep 21, 2026	5,001-10,000	1,890 contacts →
	Exact match “Aarvi Encon has established it's leadership in providing Engineering Consultancy and Technical Assistance to Oil & Gas, Refinery, Petrochemical, Pipelines, Power & Infrastructure…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Geolog International	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 21, 2026	1,001-5,000	1,685 contacts →
	Exact match “Every year, drilling teams make decisions worth millions of dollars on incomplete information.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	EKIUM	Exact match	Lyon Cedex 07, FranceHQ recorded Sep 21, 2026	1,001-5,000	1,502 contacts →
	Exact match “Welcome to Ekium!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Tp-Otc	Exact match	Çankaya, TürkiyeHQ recorded Sep 21, 2026	501-1,000	1,501 contacts →
	Exact match “TP-OTC is established to provide all engineering and technology services for offshore operations in oil and gas industry.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Core Laboratories	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,500 contacts →
	Exact match “With over 70 offices in more than 50 countries located in major oil-producing provinces, Core Laboratories provides services to the world's major, national, and independent oil…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Vulcain Engineering Group	Exact match	Neuilly-sur-seine, FranceHQ recorded Sep 21, 2026	5,001-10,000	1,496 contacts →
	Exact match “Vulcain Engineering Group is a multi-specialist engineering and consulting group serving industrial companies across the globe, focused on critical sectors: energy, health…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	RENCO	Exact match	Pesaro, ItalyHQ recorded Sep 21, 2026	1,001-5,000	1,494 contacts →
	Exact match “Renco S.p.A, an Italian company founded in 1979, is continually committed to providing its Clients with sound business solutions in an ever increasingly complex and challenging…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Audubon Companies	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,488 contacts →
	Exact match “Founded in 1997, Audubon Companies LLC provides EPC, consulting, fabrication, and field services to energy and industrial operators across the globe.” Recorded in the RevenueBase company graph · Sep 21, 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 consulting firms”. 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 13,546 oil field consulting firms worldwide

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Oil field consulting firms worldwide at a glance

As of Sep 21, 2026

17.6%Verified-email coverage

32.5Average contacts per company

11-50Median size (employees)

4.7%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

5,795

11-50

4,249

51-200

2,175

201-500

700

501-1,000

267

1,001-5,000

246

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 consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil field consulting firms” 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 77,552 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 21, 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 consulting firms by location

64 lists · largest first

Every Oil field consulting firms 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 consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil field consulting firms are there worldwide?

RevenueBase identified 13,546 company matches for oil field consulting firms 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?

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

Which country has the most oil field consulting firms?

The United States leads with 2,643 companies, followed by the United Kingdom (789) and Nigeria (739). Every oil field consulting firms list by country and city is linked on this page.

Which city has the most oil field consulting firms?

Houston leads with 642 company records, followed by Calgary (334) and Tehran (226).

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 77,552 professional contacts with verified work emails tracked across these 13,546 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 21, 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.