Company lists · Data refreshed October 2026

Top 25 Drilling engineering firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 9,210 companies tracked

RevenueBase identified 9,210 company matches for drilling engineering firms worldwide as of October 2026 and tracks 406,961 professional contacts across them, including 77,653 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for drilling engineering 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 October 11, 2026. Country and city lists for drilling engineering 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 Oct 11, 2026 How this list was built

9,210Companies

406,961Contacts tracked

77,653Verified emails

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The 25 largest drilling engineering firms worldwide

Ranked by team size

Top 25 of 9,210 company matches for drilling engineering firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 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 Oct 11, 2026	10001+	56,783 contacts →
	Exact match “We collaborate and engineer solutions to maximize asset value for our customers.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2	Aker Solutions	Exact match	Fornebu, NorwayHQ recorded Oct 11, 2026	10001+	16,152 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 · Oct 11, 2026 · View company records in RevenueBase
3	Amec Foster Wheeler	Exact match	Aberdeen, United KingdomHQ recorded Oct 11, 2026	10001+	15,181 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 · Oct 11, 2026 · View company records in RevenueBase
4	Transocean	Exact match	Zug, SwitzerlandHQ recorded Oct 11, 2026	1,001-5,000	10,599 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 · Oct 11, 2026 · View company records in RevenueBase
5	EXPRO	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	5,001-10,000	6,721 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 · Oct 11, 2026 · View company records in RevenueBase
6	Nabors Industries	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	10001+	6,266 contacts →
	Exact match “Nabors Industries is a leading provider of advanced technology for the energy industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7	Seadrill	Exact match	Houston, United StatesHQ recorded Oct 11, 2026	1,001-5,000	5,065 contacts →
	Exact match “Seadrill is setting the standard in deepwater oil and gas drilling.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8	Seatrium	Exact match	United StatesHQ recorded Oct 11, 2026	10001+	4,979 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 · Oct 11, 2026 · View company records in RevenueBase
9	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Oct 11, 2026	1,001-5,000	4,167 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 · Oct 11, 2026 · View company records in RevenueBase
10	Boart Longyear	Exact match	West Valley City, UT, United StatesHQ recorded Oct 11, 2026	5,001-10,000	3,518 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 · Oct 11, 2026 · View company records in RevenueBase
11	Precision Drilling	Exact match	Calgary, AB, CanadaHQ recorded Oct 11, 2026	5,001-10,000	2,622 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 · Oct 11, 2026 · View company records in RevenueBase
12	Patterson-Uti	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	10001+	2,444 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 · Oct 11, 2026 · View company records in RevenueBase
13	Archer	Exact match	Sandnes, NorwayHQ recorded Oct 11, 2026	5,001-10,000	2,399 contacts →
	Exact match “Archer is a company providing drilling and well services to the global energy industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14	Oilserv	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 11, 2026	1,001-5,000	2,362 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 · Oct 11, 2026 · View company records in RevenueBase
15	Ensign Energy Services	Exact match	Calgary, AB, CanadaHQ recorded Oct 11, 2026	1,001-5,000	2,277 contacts →
	Exact match “Ensign Energy Services Inc.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16	SAN Antonio Internacional	Exact match	Comuna 1, ArgentinaHQ recorded Oct 11, 2026	1,001-5,000	2,247 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 · Oct 11, 2026 · View company records in RevenueBase
17	Egyptian Drilling Company EDC	Exact match	Cairo, EgyptHQ recorded Oct 11, 2026	5,001-10,000	2,102 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 · Oct 11, 2026 · View company records in RevenueBase
18	Arabian Drilling	Exact match	Al-khobar, Saudi ArabiaHQ recorded Oct 11, 2026	5,001-10,000	2,072 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 · Oct 11, 2026 · View company records in RevenueBase
19	Englobe	Exact match	Québec, QC, CanadaHQ recorded Oct 11, 2026	1,001-5,000	1,864 contacts →
	Exact match “Englobe is a leader in the fields of engineering, gesosciences, environmental management, asset integrity and quality management.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20	Tp-Otc	Exact match	Çankaya, TürkiyeHQ recorded Oct 11, 2026	501-1,000	1,766 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 · Oct 11, 2026 · View company records in RevenueBase
21	Geolog International	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 11, 2026	1,001-5,000	1,697 contacts →
	Exact match “Every year, drilling teams make decisions worth millions of dollars on incomplete information.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22	OIL States International	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	5,001-10,000	1,652 contacts →
	Exact match “Oil States International, Inc.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	EKIUM	Exact match	Lyon Cedex 07, FranceHQ recorded Oct 11, 2026	1,001-5,000	1,550 contacts →
	Exact match “Welcome to Ekium!” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24	RENCO	Exact match	Pesaro, ItalyHQ recorded Oct 11, 2026	1,001-5,000	1,534 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 · Oct 11, 2026 · View company records in RevenueBase
25	Gulf Drilling International	Exact match	Doha, QatarHQ recorded Oct 11, 2026	1,001-5,000	1,445 contacts →
	Exact match “Gulf Drilling International Limited (GDI) was established in May 2004 as a joint venture between Qatar Petroleum (QP) and Japan Drilling Company (JDC), making it the first Qatari…” Recorded in the RevenueBase company graph · Oct 11, 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 engineering 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 9,210 drilling engineering firms worldwide

See the full list, filter by size, metro and specialty, and access 77,653 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Drilling engineering firms worldwide at a glance

As of Oct 11, 2026

19.1%Verified-email coverage

44.2Average contacts per company

11-50Median size (employees)

4.1%Largest-city concentration · Houston

Oct 11, 2026Page data refreshed

Companies by employee count

1-10

3,453

11-50

3,125

51-200

1,616

201-500

540

501-1,000

219

1,001-5,000

167

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 engineering firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “drilling engineering 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 77,653 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 October 11, 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 engineering firms by location

58 lists · largest first

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

How many drilling engineering firms are there worldwide?

RevenueBase identified 9,210 company matches for drilling engineering firms worldwide as of October 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 engineering firms?

The United States leads with 1,731 companies, followed by Canada (566) and the United Kingdom (530). Every drilling engineering firms list by country and city is linked on this page.

Which city has the most drilling engineering firms?

Houston leads with 376 company records, followed by Calgary (242) and Tehran (141).

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 77,653 professional contacts with verified work emails tracked across these 9,210 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 October 11, 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.