Company lists · Data refreshed September 2026

Top 25 Oil refinery equipment contractors based in Nigeria

Name: Oil refinery equipment contractors based in Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 393 companies tracked

RevenueBase identified 393 company matches for oil refinery equipment contractors associated with Nigeria as of September 2026 and tracks 5,818 professional contacts across them, including 760 with verified work emails. Port Harcourt is the largest hub.

This list covers company matches for oil refinery equipment contractors associated with 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

393Companies

5,818Contacts tracked

760Verified emails

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The 25 largest oil refinery equipment contractors based in Nigeria

Ranked by team size

Top 25 of 393 company matches for oil refinery equipment contractors based in 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	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
3	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
4	Pivot-Gis Limited	Exact match	Lagos, NigeriaHQ recorded Sep 17, 2026	201-500	264 contacts →
	Exact match “PIVOT-GIS is a leading Nigerian Engineering, Procurement, Construction, Operations & Maintenance (EPCOM) company serving the oil, gas, and energy sectors since 2004.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Makon Group	Exact match	Lekki, NigeriaHQ recorded Sep 17, 2026	501-1,000	192 contacts →
	Exact match “Makon Group is an international organisation with its business interests spanning Engineering, Procurement, Construction, Operation and Maintenance (EPICOM) for Oil and Gas…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Smartflow Technologies LTD	Exact match	Ikeja, NigeriaHQ recorded Sep 17, 2026	201-500	165 contacts →
	Exact match “Smartflow Technologies is an engineering company that offers supply, installation and support of fueling (and non-fuel) systems and equipment, including but not limited to…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	LEE Engineering And Construction Company LTD	Exact match	Ikoyi, NigeriaHQ recorded Sep 17, 2026	501-1,000	114 contacts →
	Exact match “Lee Engineering and Construction Co.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	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
9	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
10	Peso Energy Services	Exact match	Lekki Phase 1, NigeriaHQ recorded Sep 17, 2026	201-500	72 contacts →
	Exact match “PESO Energy Services is a leader in the Oil and Gas services industry, specializing in Engineering Services, Early Production Facility Packages, Oil Field Services, Specialized…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Elper Oilfield Engineering	Exact match	Lagos, NigeriaHQ recorded Sep 17, 2026	501-1,000	70 contacts →
	Exact match “ELPER has built in time, a strong international network, and a specialized engineering company, providing services ranging from Engineering Procurement & Construction to Marine…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Thompson & Grace Investments Limited	Exact match	Port-harcourt, NigeriaHQ recorded Sep 17, 2026	201-500	67 contacts →
	Exact match “Thompson & Grace Investment Limited (TGIL) an Engineering/ Oilfield Service company in Nigeria provides services to the Engineering Sector/Oil and Gas industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Merald Group	Exact match	Victoria Island, NigeriaHQ recorded Sep 17, 2026	201-500	62 contacts →
	Exact match “Merald Group is an Engineering and Construction Company specialised in Mechanical Works, Electrical Installations, HVAC Installations, Industrial Piping and Pipeline, Structural…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Weltek Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	55 contacts →
	Exact match “WELTEK Limited is an engineering, procurement and construction company, incorporated in Nigeria in 1986, to provide specialized services to the Oil & Gas, Power Generation…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Cakasa Maintenance Services Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	52 contacts →
	Exact match “Cakasa Maintenance Services Limited is a global oil servicing company in Nigeria, with Head Office in PortHarcourt.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Ashbard Energy Company Limited	Exact match	Port - Harcourt, NigeriaHQ recorded Sep 17, 2026	201-500	49 contacts →
	Exact match “Incorporated in 2004, Ashbard Energy Company Limited is an indigenous engineering services provider.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Deltatek Offshore Limited	Exact match	Lagos, NigeriaHQ recorded Sep 17, 2026	201-500	48 contacts →
	Exact match “DeltaTek Offshore Ltd is a leading Engineering, Procurement, Installation, Construction, and Commissioning (EPICC) service provider in the oil and gas sector of Sub-Sahara Africa.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Hexagon Engineering LTD	Exact match	Lagos, NigeriaHQ recorded Sep 17, 2026	11-50	46 contacts →
	Exact match “HEXAGON ENGINEERING LTD is a systems integration company with registered offices in Lagos, Portharcourt and Houston - Texas.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	NEW Energy Services Company Limited	Exact match	Victoria Island, NigeriaHQ recorded Sep 17, 2026	51-200	45 contacts →
	Exact match “New Energy Services Company Limited (NESSCO) is a 100% Nigerian owned company incorporated in 2003.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Goddie Chemicals International LTD	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	51-200	40 contacts →
	Exact match “Goddie Chemicals International Limited is a leading premium chemical solutions and specialized engineering services expert, positioned to reliably serve as a one-stop shop for all…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Fortafric Energy Limited	Exact match	Gwarinpa, NigeriaHQ recorded Sep 17, 2026	11-50	36 contacts →
	Exact match “FORTAFRIC is an integrated company offering services in the oil, gas, and power sector of the Nigerian economy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Alphaden Energy & Oilfield Limited	Exact match	Victoria Island, NigeriaHQ recorded Sep 17, 2026	51-200	35 contacts →
	Exact match “The ‘ALPHA’S DEN’ is a hub of professional and well experienced Alpha’s, championing their fields while collectively making up a provider of fit-for-purpose services to clients…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	TAG Energy Limited	Exact match	Lekki, NigeriaHQ recorded Sep 17, 2026	11-50	33 contacts →
	Exact match “TAG Energy is an integrated service company offering a comprehensive range of oilfield products and support services in the Nigerian Oil and Gas Industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Debyl Limited	Exact match	Port Harcourt, NigeriaHQ recorded Sep 17, 2026	11-50	32 contacts →
	Exact match “DEBYL LIMITED is an indigenous company.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	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

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 refinery equipment 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 25 of 393 oil refinery equipment contractors based in Nigeria

See the full list, filter by size, metro and specialty, and access 760 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil refinery equipment contractors based in Nigeria at a glance

As of Sep 17, 2026

13.1%Verified-email coverage

14.8Average contacts per company

11-50Median size (employees)

29.0%Largest-city concentration · Port Harcourt

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

189

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Nigeria, so it is reported there. Company counts and contact totals on this page are exact for Nigeria, over 393 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 Nigeria whose business descriptions match “oil refinery equipment 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 760 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 refinery equipment contractors by metro

Oil refinery equipment contractors in Port Harcourt114

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 refinery equipment contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil refinery equipment contractors are there based in Nigeria?

RevenueBase identified 393 company matches for oil refinery equipment contractors associated with 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 has the most oil refinery equipment contractors?

Port Harcourt leads with 114 company records, followed by Lagos (80) and Lagos State (27).

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 760 professional contacts with verified work emails tracked across these 393 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.