Company lists · Data refreshed September 2026

Top 25 Oil field services based in Port Harcourt, Nigeria

Name: Oil field services based in Port Harcourt, Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 213 companies tracked

RevenueBase identified 213 oil field services headquartered in Port Harcourt, Nigeria as of September 2026 and tracks 3,057 professional contacts across them, including 263 with verified work emails. Port Harcourt is the largest hub.

This list covers oil field services headquartered in Port Harcourt, Nigeria, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

213Companies

3,057Contacts tracked

263Verified emails

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The 25 largest oil field services based in Port Harcourt, Nigeria

Ranked by team size

Top 25 of 213 oil field services based in Port Harcourt, Nigeria, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to oil field services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	AOS Orwell Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	1,001-5,000	481 contacts →
	Indirect evidence “AOS Orwell Limited is the largest indigenous Oilfield Services Company in Nigeria.” Source: RevenueBase Database · checked Sep 20, 2026
2	Aveon Offshore Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	501-1,000	394 contacts →
	Partial evidence “Aveon Offshore Limited is an engineering and fabrication services company that has been providing construction and general fabrication services for the oil and gas industry since…” Source: RevenueBase Database · checked Sep 20, 2026
3	Hydroserve Group	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	86 contacts →
	Partial evidence “Hydroserve Group is a leading oil and gas company which started as Hydroserve Oil Services Nigeria Limited in November, We began operations in with Pipeline & Process, and Pumping…” Source: RevenueBase Database · checked Sep 20, 2026
4	Vagan OIL And GAS Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	201-500	66 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
5	Pegis Global Services Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	11-50	57 contacts →
	Partial evidence “PEGIS GLOBAL Services Limited (PGSL) is a fast growing indigenous company with operational base in Port Harcourt, focused on providing services in the Oil and gas Industry in the…” Source: RevenueBase Database · checked Sep 20, 2026
6	OIL Quest International Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	201-500	50 contacts →
	Partial evidence “Oil Quest International Limited (OQIL) is an indigenous Oil and Gas integrated technical support Service Company incorporated in Nigeria as a limited liability company on 11th…” Source: RevenueBase Database · checked Sep 20, 2026
7	True-Blue Energy Services Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	40 contacts →
	Partial evidence “True-Blue Energy Services Limited, a fully indigenous oil and gas services company in Nigeria with proven capacity for supporting clients/major projects in Onshore and Offshore…” Source: RevenueBase Database · checked Sep 20, 2026
8	Hamilton Technologies Limited Official Page	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	38 contacts →
	Indirect evidence “Hamilton Technologies Limited is the largest indigenous, new generation drilling fluids company in Nigeria providing solutions in; Mud Engineering/Drilling Support Services…” Source: RevenueBase Database · checked Sep 20, 2026
9	Dovewell Oilfield Services Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	11-50	38 contacts →
	Partial evidence “Dovewell Oilfield Services Limited is a fully Nigerian owned oil and gas service company.” Source: RevenueBase Database · checked Sep 20, 2026
10	Bill Energy Services Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	31 contacts →
	Partial evidence “Bill Energy Services Limited is an indigenous company providing services in the Oil and Gas sector, FMCG, Project Management, Safety consultancy and other sectors of the Nigerian…” Source: RevenueBase Database · checked Sep 20, 2026
11	Omasup Energy Services Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	11-50	24 contacts →
	Partial evidence “Oil & Gas Services company” Source: RevenueBase Database · checked Sep 20, 2026
12	Union Energy Services LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	11-50	22 contacts →
	Indirect evidence “Union Energy Services Limited is a well established and wholly owned Nigerian company providing Energy and Engineering Services.” Source: RevenueBase Database · checked Sep 20, 2026
13	Nymagx Energy Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	20 contacts →
	Indirect evidence “Nymagx Energy Services a wholly Nigerian owned company incorporated to provide innovative solutions for Well Services, Process, Pipeline Construction, Facilities…” Source: RevenueBase Database · checked Sep 20, 2026
14	Catobi Nigeria Enterprises Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	18 contacts →
	Partial evidence “Catobi Nigeria Enterprises Limited is a leading industrial services company providing end-to-end solutions across the oil & gas and industrial sectors.” Source: RevenueBase Database · checked Sep 20, 2026
15	Laser Engineering And Resources Consultants LTD Official Page	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	16 contacts →
	Partial evidence “Laser Engineering and Resources Consultants Limited is a Nigerian Indigenous Company that renders services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 20, 2026
16	Aftrac Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	11-50	14 contacts →
	Partial evidence “AFTRAC Limited has over 20 years of experience in delivering Oil and Gas related products and services.” Source: RevenueBase Database · checked Sep 20, 2026
17	Epic Atlantic Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	11-50	12 contacts →
	Partial evidence “Epic Atlantic Limited is an indigeneous multi-disciplinary engineering and technology company formed with a passion for technical and operational excellence for the oil and gas…” Source: RevenueBase Database · checked Sep 20, 2026
18	Supanova Energy Services Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	1-10	11 contacts →
	Partial evidence “Supanova Energy Services Limited (SES) provides an integrated field services, for both upstream and downstream sector of the energy industry.” Source: RevenueBase Database · checked Sep 20, 2026
19	Ramec Integrated Services Limited Risl A Subsidiary Of Ramec Group	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	10 contacts →
	Indirect evidence “RAMEC Integrated Services Limited (RISL) is a subsidiary of the RAMEC GROUP, a wholly indigenous Nigerian company, offering services in Directional Drilling, Measurement While…” Source: RevenueBase Database · checked Sep 20, 2026
20	Mesc Energy Services	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence “MESC Energy Services offers drilling, well intervention, pipeline and asset integrity services focused to deliver efficiency.” Source: RevenueBase Database · checked Sep 20, 2026
21	Aquadynamic Global Logistics LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	8 contacts →
	Indirect evidence “E&P Support Services Fabrication Marine & Logistics OCTG Services Pipeline Transport Rig Moves” Source: RevenueBase Database · checked Sep 20, 2026
22	Stephano Integrated Services LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	6 contacts →
	Indirect evidence “Stephano Integrated Services Limited (STSL), RC 1539784, established April 2018 and registered in Nigeria, November 2018, is a company offering a diversity of services to meet new…” Source: RevenueBase Database · checked Sep 20, 2026
23	Petrodecision	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	6 contacts →
	Partial evidence “Petrodecision is a petroleum technology company helping Oil & Gas businesses turn complex technical data into clear, actionable insights.” Source: RevenueBase Database · checked Sep 20, 2026
24	Arcworld OIL And GAS Limited	Strong evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	11-50	6 contacts →
	Strong evidence “Arcworld Oil & Gas Limited is a major supplier of a wide range of oil field equipment and materials.” Source: RevenueBase Database · checked Sep 20, 2026
25	Vhelbherg	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	1-10	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: oil field services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names oil field services.
Partial evidence: Its own public description names part of oil field services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil field services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 213 oil field services based in Port Harcourt, Nigeria

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Oil field services based in Port Harcourt, Nigeria at a glance

As of Sep 20, 2026

8.6%Verified-email coverage

14.4Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Port Harcourt

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole Nigeria list rather than for Port Harcourt, so it is reported there. Company counts and contact totals on this page are exact for Port Harcourt, over 213 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among oil field services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Port Harcourt, Nigeria whose own description of what they do matches “oil field services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names oil field services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among oil field services, and records with no verified work email. Companies headquartered outside Port Harcourt are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 263 across the full list. 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 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Oil field services by metro in Nigeria

Oil field services in Port Harcourt213
Oil field services in Lagos115
Oil field services in Rivers39
Oil field services in Lagos State31

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names oil field services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many oil field services are there based in Port Harcourt, Nigeria?

RevenueBase identified 213 oil field services headquartered in Port Harcourt, Nigeria as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

AOS Orwell Limited, headquartered in Port Harcourt, tops this list with the largest team on record.

Which city has the most oil field services?

Port Harcourt leads with 213 headquartered companies, followed by Lagos (115) and Rivers (39).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 263 verified decision-maker contacts tracked across these 213 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 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 Smart Search, 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.