Company lists · Data refreshed October 2026

Top 25 Drilling engineering consultants worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 10,375 companies tracked

RevenueBase identified 10,375 company matches for drilling engineering consultants worldwide as of October 2026 and tracks 226,450 professional contacts across them, including 40,849 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for drilling engineering consultants 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 consultants 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

10,375Companies

226,450Contacts tracked

40,849Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest drilling engineering consultants worldwide

Ranked by team size

Top 25 of 10,375 company matches for drilling engineering consultants 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	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
2	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
3	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
4	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
5	Aarvi Encon	Exact match	Mumbai, IndiaHQ recorded Oct 11, 2026	5,001-10,000	1,862 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 · Oct 11, 2026 · View company records in RevenueBase
6	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
7	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
8	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
9	Atwell, LLC	Exact match	Southfield, MI, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,499 contacts →
	Exact match “Atwell is a full-service consulting, engineering and construction services firm that delivers a broad range of creative solutions to clients in the real estate and land…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10	Geosol Geologia E Sondagens S.A	Exact match	Belo Horizonte, BrazilHQ recorded Oct 11, 2026	1,001-5,000	1,332 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 · Oct 11, 2026 · View company records in RevenueBase
11	PT Pertamina Drilling Services Indonesia	Exact match	South Jakarta, IndonesiaHQ recorded Oct 11, 2026	1,001-5,000	1,300 contacts →
	Exact match “PT Pertamina Drilling Services Indonesia (Pertamina Drilling) was established on June 13th, 2008.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12	Abraj Energy Services	Exact match	Muscat, OmanHQ recorded Oct 11, 2026	1,001-5,000	1,274 contacts →
	Exact match “Abraj Energy Services ("Abraj"), was founded in May 2006 and has taken major strides.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13	Queiroz Galvão Óleo E GÁS S.A	Exact match	BrazilHQ recorded Oct 11, 2026	1,001-5,000	1,181 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 · Oct 11, 2026 · View company records in RevenueBase
14	HMH	Exact match	Amsterdam, NetherlandsHQ recorded Oct 11, 2026	1,001-5,000	1,165 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 · Oct 11, 2026 · View company records in RevenueBase
15	Frank's International N.V	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,145 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
16	Zuhair Fayez	Exact match	Riyadh, Saudi ArabiaHQ recorded Oct 11, 2026	1,001-5,000	1,116 contacts →
	Exact match “Zuhair Fayez stands as the region's foremost engineering and consulting firm, renowned for our innovative approach in architecture, project management, and oil and gas services.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17	John Energy Limited	Exact match	Ahmadabad, IndiaHQ recorded Oct 11, 2026	501-1,000	1,071 contacts →
	Exact match “JEL is India based niche provider of oil & Gas Field serives.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18	Carso Perforación	Exact match	United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,017 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 · Oct 11, 2026 · View company records in RevenueBase
19	Cesel Ingenieros	Exact match	Lima, PeruHQ recorded Oct 11, 2026	1,001-5,000	936 contacts →
	Exact match “CESEL es una empresa peruana privada de consultoría en ingeniería, reconocida por su sólida trayectoria y prestigio en el desarrollo exitoso de proyectos multidisciplinarios de…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20	M. N. Dastur & Co. P LTD	Exact match	Kolkata, IndiaHQ recorded Oct 11, 2026	1,001-5,000	904 contacts →
	Exact match “M.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21	Excellence Logging	Exact match	London W2 2es, United KingdomHQ recorded Oct 11, 2026	1,001-5,000	866 contacts →
	Exact match “Excellence Logging is an established energy services provider focused on optimizing well performance.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22	Kbr-Amcde	Exact match	Al-khobar, Saudi ArabiaHQ recorded Oct 11, 2026	501-1,000	841 contacts →
	Exact match “KBR-AMCDE has been successfully delivering engineering solutions in the Kingdom since 2011.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	Phoenix Technology Services	Exact match	Calgary, AB, CanadaHQ recorded Oct 11, 2026	501-1,000	836 contacts →
	Exact match “Phoenix Technology Services delivers progressive directional drilling solutions to unconventional drilling markets around the world.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24	BGC Engineering INC	Exact match	Vancouver, BC, CanadaHQ recorded Oct 11, 2026	501-1,000	813 contacts →
	Exact match “BGC Engineering is an international consulting firm that provides professional services in applied earth sciences.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25	AGR	Exact match	Oslo, NorwayHQ recorded Oct 11, 2026	501-1,000	813 contacts →
	Exact match “AGR – an Aqualis company – is a multidisciplinary consultancy, specialising in drilling & wells, subsurface, marine and subsea solutions, resourcing, technical safety and software…” 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 consultants”. 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 10,375 drilling engineering consultants worldwide

See the full list, filter by size, metro and specialty, and access 40,849 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Drilling engineering consultants worldwide at a glance

As of Oct 11, 2026

18.0%Verified-email coverage

21.8Average contacts per company

11-50Median size (employees)

3.5%Largest-city concentration · Houston

Oct 11, 2026Page data refreshed

Companies by employee count

1-10

4,716

11-50

3,330

51-200

1,495

201-500

473

501-1,000

177

1,001-5,000

115

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 consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “drilling engineering consultants” 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 40,849 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 consultants by location

57 lists · largest first

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

How many drilling engineering consultants are there worldwide?

RevenueBase identified 10,375 company matches for drilling engineering consultants 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?

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

Which country has the most drilling engineering consultants?

The United States leads with 1,706 companies, followed by the United Kingdom (636) and Canada (591). Every drilling engineering consultants list by country and city is linked on this page.

Which city has the most drilling engineering consultants?

Houston leads with 360 company records, followed by Calgary (242) and Tehran (156).

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 40,849 professional contacts with verified work emails tracked across these 10,375 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.

Ready to reach these companies? Verified emails and direct dials for all 10,375 drilling engineering consultants worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.