Company lists · Data refreshed September 2026

Top 25 Drilling consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 8,824 companies tracked

RevenueBase identified 8,824 company matches for drilling consulting firms worldwide as of September 2026 and tracks 267,482 professional contacts across them, including 53,490 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for drilling 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 28, 2026. Country and city lists for drilling 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 28, 2026 How this list was built

8,824Companies

267,482Contacts tracked

53,490Verified emails

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The 25 largest drilling consulting firms worldwide

Ranked by team size

Top 25 of 8,824 company matches for drilling consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 28, 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 28, 2026 · View company records in RevenueBase
2	EXPRO	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
3	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
4	Boart Longyear	Exact match	West Valley City, UT, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
5	ADES	Exact match	Al Khobar, Saudi ArabiaHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
6	Ensco PLC	Exact match	London, United KingdomHQ recorded Sep 28, 2026	5,001-10,000	2,679 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 28, 2026 · View company records in RevenueBase
7	Precision Drilling	Exact match	Calgary, AB, CanadaHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
8	Archer	Exact match	Sandnes, NorwayHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
9	Patterson-Uti	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
10	Oilserv	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
11	Ensign Energy Services	Exact match	Calgary, AB, CanadaHQ recorded Sep 28, 2026	1,001-5,000	2,176 contacts →
	Exact match “Ensign Energy Services Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Egyptian Drilling Company EDC	Exact match	Cairo, EgyptHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
13	SAN Antonio Internacional	Exact match	Comuna 1, ArgentinaHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
14	Arabian Drilling	Exact match	Al-khobar, Saudi ArabiaHQ recorded Sep 28, 2026	5,001-10,000	2,042 contacts →
	Exact match “We are the region’s trusted onshore and offshore oil & gas drilling company with an extensive track record of operational excellence and advanced capabilities that have enabled…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Tp-Otc	Exact match	Çankaya, TürkiyeHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
16	Major Drilling	Exact match	Moncton, NB, CanadaHQ recorded Sep 28, 2026	1,001-5,000	1,447 contacts →
	Exact match “Major Drilling Group International Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Geosol Geologia E Sondagens S.A	Exact match	Belo Horizonte, BrazilHQ recorded Sep 28, 2026	1,001-5,000	1,317 contacts →
	Exact match “One of the leading geology companies in the world, GEOSOL excels in the undertaking of geological drilling and mineral engineering programs.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Abraj Energy Services	Exact match	Muscat, OmanHQ recorded Sep 28, 2026	1,001-5,000	1,244 contacts →
	Exact match “Abraj Energy Services ("Abraj"), was founded in May 2006 and has taken major strides.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	PT Pertamina Drilling Services Indonesia	Exact match	South Jakarta, IndonesiaHQ recorded Sep 28, 2026	1,001-5,000	1,200 contacts →
	Exact match “PT Pertamina Drilling Services Indonesia (Pertamina Drilling) was established on June 13th, 2008.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Scientific Drilling	Exact match	The Woodlands, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,134 contacts →
	Exact match “THE ULTIMATE PARTNER IN WELLBORE PLACEMENT Scientific Drilling International is an independent service provider offering a complete high accuracy wellbore placement and drilling…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	HMH	Exact match	Amsterdam, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,097 contacts →
	Exact match “HMH is a premier drilling solutions provider - delivering a broad portfolio of products and services that are designed to be the safest and most efficient in the industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Queiroz Galvão Óleo E GÁS S.A	Exact match	BrazilHQ recorded Sep 28, 2026	1,001-5,000	1,069 contacts →
	Exact match “A Queiroz Galvão Óleo e Gás (QGOG) é a maior companhia privada de prestação de serviços de perfuração e produção do Brasil.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Master Drilling Group LTD	Exact match	Fochville, South AfricaHQ recorded Sep 28, 2026	1,001-5,000	994 contacts →
	Exact match “Master Drilling, established in 1986, is a global technology solutions driven company; focused on delivering a fully mechanised range of services to the mining sector.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Carso Perforación	Exact match	United StatesHQ recorded Sep 28, 2026	1,001-5,000	994 contacts →
	Exact match “Empresa líder en el Sector Petrolero, con presencia a Nivel Nacional, principales clientes PEMEX Y CFE, con servicios como perforación de pozos terrestres, Marinos, Geotérmicos…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Excellence Logging	Exact match	London W2 2es, United KingdomHQ recorded Sep 28, 2026	1,001-5,000	933 contacts →
	Exact match “Excellence Logging is an established energy services provider focused on optimizing well performance.” Recorded in the RevenueBase company graph · Sep 28, 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 “drilling 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 8,824 drilling consulting firms worldwide

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Drilling consulting firms worldwide at a glance

As of Sep 28, 2026

20.0%Verified-email coverage

30.3Average contacts per company

11-50Median size (employees)

4.4%Largest-city concentration · Houston

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

4,090

11-50

2,731

51-200

1,237

201-500

422

501-1,000

156

1,001-5,000

120

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 drilling consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “drilling 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 53,490 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 28, 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.

Drilling consulting firms by location

51 lists · largest first

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

How many drilling consulting firms are there worldwide?

RevenueBase identified 8,824 company matches for drilling 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 drilling consulting firms?

The United States leads with 1,851 companies, followed by Canada (641) and the United Kingdom (456). Every drilling consulting firms list by country and city is linked on this page.

Which city has the most drilling consulting firms?

Houston leads with 388 company records, followed by Calgary (244) and Perth (95).

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 53,490 professional contacts with verified work emails tracked across these 8,824 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 28, 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.