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 oil refinery equipment contractors headquartered in 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 oil refinery equipment contractors headquartered in 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 17, 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 17, 2026 86% judged on-target in blind review

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 oil refinery equipment contractors based in Nigeria, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to oil refinery equipment contractors: 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 17, 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 17, 2026
2	Aveon Offshore Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 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 17, 2026
3	Dover Engineering Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	501-1,000	315 contacts →
	Indirect evidence “Dover Engineering Limited is a reputable Engineering Design,EPC, Operations & Maintenance Company.” Source: RevenueBase Database · checked Sep 17, 2026
4	Pivot-Gis Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 2026	201-500	264 contacts →
	Partial evidence “PIVOT-GIS is a leading Nigerian Engineering, Procurement, Construction, Operations & Maintenance (EPCOM) company serving the oil, gas, and energy sectors since 2004.” Source: RevenueBase Database · checked Sep 17, 2026
5	Makon Group	Partial evidence	Lekki, NigeriaHQ checked Sep 17, 2026	501-1,000	192 contacts →
	Partial evidence “Makon Group is an international organisation with its business interests spanning Engineering, Procurement, Construction, Operation and Maintenance (EPICOM) for Oil and Gas…” Source: RevenueBase Database · checked Sep 17, 2026
6	Smartflow Technologies LTD	Partial evidence	Ikeja, NigeriaHQ checked Sep 17, 2026	201-500	165 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
7	LEE Engineering And Construction Company LTD	Indirect evidence	Ikoyi, NigeriaHQ checked Sep 17, 2026	501-1,000	114 contacts →
	Indirect evidence “Lee Engineering and Construction Co.” Source: RevenueBase Database · checked Sep 17, 2026
8	PE Energy LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	92 contacts →
	Indirect evidence “PE Energy is an Engineering Design, Procurement/Supply Chain, Integration, Installation and Maintenance of process facility Partner.” Source: RevenueBase Database · checked Sep 17, 2026
9	Hydroserve Group	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 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 17, 2026
10	Peso Energy Services	Partial evidence	Lekki Phase 1, NigeriaHQ checked Sep 17, 2026	201-500	72 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
11	Elper Oilfield Engineering	Indirect evidence	Lagos, NigeriaHQ checked Sep 17, 2026	501-1,000	70 contacts →
	Indirect evidence “ELPER has built in time, a strong international network, and a specialized engineering company, providing services ranging from Engineering Procurement & Construction to Marine…” Source: RevenueBase Database · checked Sep 17, 2026
12	Thompson & Grace Investments Limited	Partial evidence	Port-harcourt, NigeriaHQ checked Sep 17, 2026	201-500	67 contacts →
	Partial evidence “Thompson & Grace Investment Limited (TGIL) an Engineering/ Oilfield Service company in Nigeria provides services to the Engineering Sector/Oil and Gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
13	Merald Group	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 17, 2026	201-500	62 contacts →
	Indirect evidence “Merald Group is an Engineering and Construction Company specialised in Mechanical Works, Electrical Installations, HVAC Installations, Industrial Piping and Pipeline, Structural…” Source: RevenueBase Database · checked Sep 17, 2026
14	Weltek Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	55 contacts →
	Partial evidence “WELTEK Limited is an engineering, procurement and construction company, incorporated in Nigeria in 1986, to provide specialized services to the Oil & Gas, Power Generation…” Source: RevenueBase Database · checked Sep 17, 2026
15	Cakasa Maintenance Services Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	52 contacts →
	Partial evidence “Cakasa Maintenance Services Limited is a global oil servicing company in Nigeria, with Head Office in PortHarcourt.” Source: RevenueBase Database · checked Sep 17, 2026
16	Ashbard Energy Company Limited	Indirect evidence	Port - Harcourt, NigeriaHQ checked Sep 17, 2026	201-500	49 contacts →
	Indirect evidence “Incorporated in 2004, Ashbard Energy Company Limited is an indigenous engineering services provider.” Source: RevenueBase Database · checked Sep 17, 2026
17	Deltatek Offshore Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 2026	201-500	48 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
18	Hexagon Engineering LTD	Indirect evidence	Lagos, NigeriaHQ checked Sep 17, 2026	11-50	46 contacts →
	Indirect evidence “HEXAGON ENGINEERING LTD is a systems integration company with registered offices in Lagos, Portharcourt and Houston - Texas.” Source: RevenueBase Database · checked Sep 17, 2026
19	NEW Energy Services Company Limited	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 17, 2026	51-200	45 contacts →
	Indirect evidence “New Energy Services Company Limited (NESSCO) is a 100% Nigerian owned company incorporated in 2003.” Source: RevenueBase Database · checked Sep 17, 2026
20	Goddie Chemicals International LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	40 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
21	Fortafric Energy Limited	Partial evidence	Gwarinpa, NigeriaHQ checked Sep 17, 2026	11-50	36 contacts →
	Partial evidence “FORTAFRIC is an integrated company offering services in the oil, gas, and power sector of the Nigerian economy.” Source: RevenueBase Database · checked Sep 17, 2026
22	Alphaden Energy & Oilfield Limited	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 17, 2026	51-200	35 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
23	TAG Energy Limited	Partial evidence	Lekki, NigeriaHQ checked Sep 17, 2026	11-50	33 contacts →
	Partial evidence “TAG Energy is an integrated service company offering a comprehensive range of oilfield products and support services in the Nigerian Oil and Gas Industry.” Source: RevenueBase Database · checked Sep 17, 2026
24	Debyl Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	32 contacts →
	Indirect evidence “DEBYL LIMITED is an indigenous company.” Source: RevenueBase Database · checked Sep 17, 2026
25	Waal Energy Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	29 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 17, 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 refinery equipment contractors. 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 refinery equipment contractors.
Partial evidence: Its own public description names part of oil refinery equipment contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil refinery equipment contractors. 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 393 oil refinery equipment contractors based in Nigeria

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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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among oil refinery equipment contractors, 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 Nigeria whose own description of what they do matches “oil refinery equipment contractors”. 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 refinery equipment contractors), 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 refinery equipment contractors, and records with no verified work email. Companies headquartered outside Nigeria 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, 760 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 17, 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 refinery equipment contractors by metro

Oil refinery equipment contractors in Port Harcourt114
Oil refinery equipment contractors in Lagos80
Oil refinery equipment contractors in Lagos State27

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 refinery equipment contractors, 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 refinery equipment contractors are there based in Nigeria?

RevenueBase identified 393 oil refinery equipment contractors headquartered in 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 refinery equipment contractors?

Port Harcourt leads with 114 headquartered companies, 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 the top results, verified emails and direct dials included. Upgrading unlocks all 760 verified decision-maker contacts tracked across these 393 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 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 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.