Company lists · Data refreshed September 2026

Top 20 Oil and gas processing plant contractors based in Port Harcourt, Nigeria

Name: Oil and gas processing plant contractors based in Port Harcourt, Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 172 companies tracked

RevenueBase identified 172 company matches for oil and gas processing plant contractors associated with Port Harcourt, Nigeria as of September 2026 and tracks 3,624 professional contacts across them, including 425 with verified work emails. Across Nigeria, Port Harcourt is the largest hub for this category.

This list covers company matches for oil and gas processing plant contractors associated with Port Harcourt, Nigeria, 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 17, 2026.

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 17, 2026 How this list was built

172Companies

3,624Contacts tracked

425Verified emails

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The 20 largest oil and gas processing plant contractors based in Port Harcourt, Nigeria

Ranked by team size

Top 20 of 172 company matches for oil and gas processing plant contractors based in Port Harcourt, Nigeria, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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	AOS Orwell Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	1,001-5,000	481 contacts →
	Exact match “AOS Orwell Limited is the largest indigenous Oilfield Services Company in Nigeria.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Alcon Nigeria LTD	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	1,001-5,000	417 contacts →
	Exact match “ALCON Nigeria Limited commenced operation on the 10th day of May 1982 as MED Construction, incorporated with registration no: RC 47042.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Aveon Offshore Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	501-1,000	394 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Dover Engineering Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	501-1,000	315 contacts →
	Exact match “Dover Engineering Limited is a reputable Engineering Design,EPC, Operations & Maintenance Company.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	PE Energy LTD	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	92 contacts →
	Exact match “PE Energy is an Engineering Design, Procurement/Supply Chain, Integration, Installation and Maintenance of process facility Partner.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Hydroserve Group	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	86 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Vagan OIL And GAS Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	201-500	66 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Bridgsite Nigeria Limited BNL	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	201-500	55 contacts →
	Exact match “BRIDGSITE NIGERIA LIMITED (BNL) is an indigenous Engineering and Construction Services Company engaged in the provision of solution oriented, cost effective and responsive high…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	True-Blue Energy Services Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	40 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Waal Energy Services Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	29 contacts →
	Exact match “Registered in 2020 and commenced business operations in October 2022, Waal Energy Services Limited is a full-spectrum technical solutions company focused on delivering end-to-end…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Union Energy Services LTD	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	11-50	22 contacts →
	Exact match “Union Energy Services Limited is a well established and wholly owned Nigerian company providing Energy and Engineering Services.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Hopic Nigeria LTD	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	11-50	20 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Atma Global Resources Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	11-50	17 contacts →
	Exact match “Atma Global Resources Limited is a wholly Nigerian Engineering Procurement, Installation, Maintenance, and Commissioning Company created for the purpose of providing services to…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Epic Atlantic Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	11-50	12 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	African Star Energies LTD	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	7 contacts →
	Exact match “A privately owned company established in 2008,offeringg a portfolio of products and services tailored to answer the ever-increasing demand for locally sourced support in the…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Arcworld OIL And GAS Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	11-50	6 contacts →
	Exact match “Arcworld Oil & Gas Limited is a major supplier of a wide range of oil field equipment and materials.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Vhelbherg	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	1-10	6 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	MJD Oilfield Services Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	5 contacts →
	Exact match “With nearly a decade of operations, MJD Oilfield Services Limited has become a unique provider of solutions to the Nigerian oil and gas industry with dynamic expertise in…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Nymagx Energy Services LTD	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	3 contacts →
	Exact match “Nymagx Energy Services a wholly Nigerian owned company incorporated to provide innovative solutions for Well Services, Process, Pipeline Construction, Facilities…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Bbtm Integrated Global Resources Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	11-50	3 contacts →
	Exact match “Introducing BBTM Integrated Global Resources Limited, a leading provider of comprehensive solutions in the energy sector.” Recorded in the RevenueBase company graph · Sep 17, 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 and gas processing plant contractors”. 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 20 of 172 oil and gas processing plant contractors based in Port Harcourt, Nigeria

See the full list, filter by size, metro and specialty, and access 425 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil and gas processing plant contractors based in Port Harcourt, Nigeria at a glance

As of Sep 17, 2026

11.7%Verified-email coverage

21.1Average contacts per company

11-50Median size (employees)

Sep 17, 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 172 companies.

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.
What qualifies: Company records associated with Port Harcourt, Nigeria whose business descriptions match “oil and gas processing plant contractors” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 425 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 17, 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 and gas processing plant contractors by metro in Nigeria

Oil and gas processing plant contractors in Lagos104

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 and gas processing plant contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil and gas processing plant contractors are there based in Port Harcourt, Nigeria?

RevenueBase identified 172 company matches for oil and gas processing plant contractors associated with Port Harcourt, Nigeria 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?

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

Which city in Nigeria has the most oil and gas processing plant contractors?

Port Harcourt leads Nigeria with 172 company records, followed by Lagos (104) and Lagos State (37).

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 425 professional contacts with verified work emails tracked across these 172 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 17, 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.