Company lists · Data refreshed September 2026

Top 25 Subsea flow assurance companies based in Nigeria

Name: Subsea flow assurance companies based in Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 139 companies tracked

RevenueBase identified 139 subsea flow assurance companies headquartered in Nigeria as of September 2026 and tracks 1,704 professional contacts across them, including 137 with verified work emails. Port Harcourt is the largest hub.

This list covers subsea flow assurance companies 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 22, 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 22, 2026 86% judged on-target in blind review

139Companies

1,704Contacts tracked

137Verified emails

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The 25 largest subsea flow assurance companies based in Nigeria

Ranked by team size

Top 25 of 139 subsea flow assurance companies based in Nigeria, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to subsea flow assurance companies: 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	Ariosh	Partial evidence	Lagos, NigeriaHQ checked Sep 22, 2026	201-500	243 contacts →
	Partial evidence “Ariosh delivers engineering and construction services in the onshore, offshore and subsea segment of the oil and gas sector in Nigeria, West Africa.” Source: RevenueBase Database · checked Sep 22, 2026
2	Arion Energy Services Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 22, 2026	51-200	114 contacts →
	Indirect evidence “Arion Energy Services is an engineering, projects, and operations service provider to the oil and gas, power and maritime industries.” Source: RevenueBase Database · checked Sep 22, 2026
3	Elper Oilfield Engineering	Indirect evidence	Lagos, NigeriaHQ checked Sep 22, 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 22, 2026
4	Thompson & Grace Investments Limited	Indirect evidence	Port-harcourt, NigeriaHQ checked Sep 22, 2026	201-500	67 contacts →
	Indirect 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 22, 2026
5	TAG Energy Limited	Indirect evidence	Lekki, NigeriaHQ checked Sep 22, 2026	11-50	33 contacts →
	Indirect 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 22, 2026
6	Houston Engineering And Marine Services Limited	Indirect evidence	Port-harcourt, NigeriaHQ checked Sep 22, 2026	201-500	32 contacts →
	Indirect evidence “Houston Engineering and Marine Services Limited is missioned to deliver quality and innovative services to our stakeholders through exceptional professionalism, healthy, and safe…” Source: RevenueBase Database · checked Sep 22, 2026
7	Subsea100 Global	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 22, 2026	11-50	30 contacts →
	Partial evidence “Overview Subsea100 Global(SHG), established in 2011, is a leading independent Offshore Services Contractor providing a range of Geophysical, Geotechnical and Subsea related…” Source: RevenueBase Database · checked Sep 22, 2026
8	Deepwater Engineering Limited DEL	Indirect evidence	Warri, NigeriaHQ checked Sep 22, 2026	11-50	29 contacts →
	Indirect evidence “Deepwater Engineering Limited (DEL) is a multi-discipline service provider formed by experienced professionals with years of direct experience within the major offshore Oil and…” Source: RevenueBase Database · checked Sep 22, 2026
9	Waal Energy Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 22, 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 22, 2026
10	Tabor Energy Solutions	Indirect evidence	Lagos, NigeriaHQ checked Sep 22, 2026	51-200	24 contacts →
	Indirect evidence “Tabor Energy Solutions is an industry leading organisation with expertise and depth of experience in Asset Integrity, Inspection, Repairs, Maintenance and Manpower Supply services.” Source: RevenueBase Database · checked Sep 22, 2026
11	Cozym Limited	Indirect evidence	Lekki Phase 1, NigeriaHQ checked Sep 22, 2026	11-50	20 contacts →
	Indirect evidence “Cozym Limited is a family of Engineers and Consultants with core competencies in the areas of Feasibility Studies, Front End and Detailed Engineering Designs, Materials…” Source: RevenueBase Database · checked Sep 22, 2026
12	Dovaheights Energy Limited	Indirect evidence	Lekki, NigeriaHQ checked Sep 22, 2026	11-50	18 contacts →
	Indirect evidence “Dovaheights Energy is an innovative and Technological driven independent company that uses Robotics to provide solutions Offshores.” Source: RevenueBase Database · checked Sep 22, 2026
13	Deep Water Consultancy & Engineering Services LTD	Partial evidence	Lekki, NigeriaHQ checked Sep 22, 2026	11-50	15 contacts →
	Partial evidence “DeepWater Consultancy & Engineering Services Limited is an Independent Oil and Gas Subsea technology, Pipeline management and Field development engineering consultancy company…” Source: RevenueBase Database · checked Sep 22, 2026
14	Atlantic Marine & Oilfield Services LTD	Partial evidence	Ikoyi, NigeriaHQ checked Sep 22, 2026	51-200	15 contacts →
	Partial evidence “Atlantic Marine & Oilfield Services has been operating as a distinguished Subsea Engineering and Diving Company since maintaining an ISO 9001-2015 certification.” Source: RevenueBase Database · checked Sep 22, 2026
15	Linkso Nigeria LTD	Indirect evidence	Lagos, NigeriaHQ checked Sep 22, 2026	201-500	14 contacts →
	Indirect evidence “LINKSO NIGERIA LTD is a leading service provider in the oil and gas, power and construction industries.” Source: RevenueBase Database · checked Sep 22, 2026
16	Tethys Plantgeria LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 22, 2026	11-50	13 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
17	Epic Atlantic Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 22, 2026	11-50	12 contacts →
	Indirect 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 22, 2026
18	Offshore Dimensions Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “Offshore Dimensions Limited is a Nigerian EPC company that is committed to building engineering and construction capabilities in Nigeria.” Source: RevenueBase Database · checked Sep 22, 2026
19	Brisktrade	Indirect evidence	Lagos, NigeriaHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “Brisktrade is a 100% Nigerian owned company, incorporated in 2009 and began operations in the Oil & Gas industry in 2014, with offices in Lagos and an operational base in Port…” Source: RevenueBase Database · checked Sep 22, 2026
20	Fadfae Engineering Services Limited	Indirect evidence	Lekki, NigeriaHQ checked Sep 22, 2026	11-50	8 contacts →
	Indirect evidence “We are an Independent Oil and Gas Engineering Company established by a group of professionals with local and international oil and gas experience to provide bespoke Pipeline…” Source: RevenueBase Database · checked Sep 22, 2026
21	African Star Energies LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 22, 2026	51-200	7 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
22	MJD Oilfield Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 22, 2026	51-200	5 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
23	Ethnarch Energy	Partial evidence	Lagos, NigeriaHQ checked Sep 22, 2026	11-50	5 contacts →
	Partial evidence “Ethnarch Energy is a privately owned oilfield solutions company, offering end-to-end aerial and subsea oilfield services including but not limited to UAVs, ROVs, SUBSEA and SURF…” Source: RevenueBase Database · checked Sep 22, 2026
24	Ethan Petroleum & GAS Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 22, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
25	Mantle-Gold LTD	Indirect evidence	Lekki, NigeriaHQ checked Sep 22, 2026	11-50	1 contacts →
	Indirect evidence “Mantle-Gold Ltd was registered with the Corporate Affairs Commission in June 2014.” Source: RevenueBase Database · checked Sep 22, 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: subsea flow assurance companies. 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 subsea flow assurance companies.
Partial evidence: Its own public description names part of subsea flow assurance companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name subsea flow assurance companies. 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 139 subsea flow assurance companies based in Nigeria

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Subsea flow assurance companies based in Nigeria at a glance

As of Sep 22, 2026

8.0%Verified-email coverage

12.3Average contacts per company

11-50Median size (employees)

36.0%Largest-city concentration · Port Harcourt

Sep 22, 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 worldwide rather than for Nigeria, so it is reported there. Company counts and contact totals on this page are exact for Nigeria, over 139 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 subsea flow assurance companies, 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 “subsea flow assurance companies”. 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 subsea flow assurance companies), 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 subsea flow assurance companies, 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, 137 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 22, 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.

Subsea flow assurance companies by metro

Subsea flow assurance companies in Port Harcourt50
Subsea flow assurance companies in Lagos26

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 subsea flow assurance companies, 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 subsea flow assurance companies are there based in Nigeria?

RevenueBase identified 139 subsea flow assurance companies 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?

Ariosh, headquartered in Lagos, tops this list with the largest team on record.

Which city has the most subsea flow assurance companies?

Port Harcourt leads with 50 headquartered companies, followed by Lagos (26) and Lagos State (7).

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 137 verified decision-maker contacts tracked across these 139 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 22, 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.