Company lists · Data refreshed September 2026

Top 25 Offshore well services based in Nigeria

Name: Offshore well services based in Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 414 companies tracked

RevenueBase identified 414 offshore well services headquartered in Nigeria as of September 2026 and tracks 7,649 professional contacts across them, including 923 with verified work emails. Port Harcourt is the largest hub.

This list covers offshore well services 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 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

414Companies

7,649Contacts tracked

923Verified emails

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The 25 largest offshore well services based in Nigeria

Ranked by team size

Top 25 of 414 offshore well services based in Nigeria, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to offshore well 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	Hydrodive Group	Partial evidence	Lagos, NigeriaHQ checked Sep 20, 2026	201-500	409 contacts →
	Partial evidence “HydroDive provides a broad range of Marine Vessels, Air, Mixed Gas and Saturation Diving, ROV, AUV and Survey Services primarily to the offshore & inshore Petroleum Industry of…” Source: RevenueBase Database · checked Sep 20, 2026
3	Marine Platforms Limited	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 20, 2026	201-500	377 contacts →
	Indirect evidence “Marine Platforms is an oil service company focused on providing diverse services to the upstream sector of the oil & gas industry in Nigeria and the African continent sustainably.” Source: RevenueBase Database · checked Sep 20, 2026
4	Geoplex Drillteq Limited	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 20, 2026	201-500	356 contacts →
	Indirect evidence “Geoplex Drillteq Limited is the fastest-growing indigenous service provider in Sub-Saharan Africa, proudly holding the API Q2 certification, a testament to our commitment to…” Source: RevenueBase Database · checked Sep 20, 2026
5	OES Energy Services Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 20, 2026	51-200	172 contacts →
	Indirect evidence “Vision To be the preferred Integrated Upstream Oilfield Services Provider in Africa creating value for all stakeholders.” Source: RevenueBase Database · checked Sep 20, 2026
6	Ponticelli Nigeria	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	501-1,000	151 contacts →
	Indirect evidence “PONTICELLI NIGERIA [PNL] is a subsidiary of PONTICELLI Frères Group, a leading European services supplier to companies in the energy, industrial, and infrastructural sectors.” Source: RevenueBase Database · checked Sep 20, 2026
7	Bell OIL & GAS	Indirect evidence	Lagos, NigeriaHQ checked Sep 20, 2026	51-200	129 contacts →
	Indirect evidence “Bell Oil & Gas has grown rapidly to become a leading indigenous oil service company in Nigeria.” Source: RevenueBase Database · checked Sep 20, 2026
8	Arion Energy Services Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 20, 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 20, 2026
9	Emval Nigeria Limited	Partial evidence	Lekki, NigeriaHQ checked Sep 20, 2026	51-200	109 contacts →
	Partial evidence “The Company Emval Nigeria Limited is a servicing company that provides onshore and offshore technical services to the Oil & Gas industry.” Source: RevenueBase Database · checked Sep 20, 2026
10	Depthwize	Partial evidence	Lagos, NigeriaHQ checked Sep 20, 2026	201-500	102 contacts →
	Partial evidence “Depthwize is a Nigerian Drilling Contractor with current assets in the swamp and shallow offshore drilling market.” Source: RevenueBase Database · checked Sep 20, 2026
11	Mariteam Nigeria LTD	Partial evidence	Lagos Island, NigeriaHQ checked Sep 20, 2026	11-50	88 contacts →
	Partial evidence “Mariteam Nigeria Ltd is a fully licensed Nigeria company actively involved in a range of services in offshore maritime and oil & gas sector in Nigeria.” Source: RevenueBase Database · checked Sep 20, 2026
12	Caverton Offshore Support Group PLC	Partial evidence	Victoria Island, NigeriaHQ checked Sep 20, 2026	501-1,000	88 contacts →
	Partial evidence “Caverton Offshore Support Group Plc is the public limited company holding Caverton Helicopters Limited and Caverton Marine Limited.” Source: RevenueBase Database · checked Sep 20, 2026
13	Hydroserve Group	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	86 contacts →
	Indirect 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
14	Kenyon International West Africa Company Limited	Indirect evidence	Portharcourt., NigeriaHQ checked Sep 20, 2026	51-200	74 contacts →
	Indirect evidence “Kenyon International West Africa Company Limited is one of the leading and fastest-growing energy servicing companies in Nigeria with robust technical expertise, offering vital…” Source: RevenueBase Database · checked Sep 20, 2026
15	Aviam Offshore Engineering Company Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 20, 2026	201-500	73 contacts →
	Partial evidence “AOECL provides Drilling & Well completion, Manpower, Procurement, Dredging, Inspection, and EPCI services (Engineering, Procurement, Technical Consultancy, Facility Maintenance…” Source: RevenueBase Database · checked Sep 20, 2026
16	Peso Energy Services	Indirect evidence	Lekki Phase 1, NigeriaHQ checked Sep 20, 2026	201-500	72 contacts →
	Indirect 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 20, 2026
17	Bricks Mursten Mattoni LTD	Indirect evidence	Apapa, NigeriaHQ checked Sep 20, 2026	51-200	71 contacts →
	Indirect evidence “BRICKS was established in 2008 with the aim of providing a comprehensive package of services, tailored to our client’s requirements in the chain of sectors.” Source: RevenueBase Database · checked Sep 20, 2026
18	Pegis Global Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	11-50	57 contacts →
	Indirect 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
19	Sellafield Energy	Indirect evidence	Lekki, NigeriaHQ checked Sep 20, 2026	11-50	56 contacts →
	Indirect evidence “Sellafield Energy is a leading oil and gas support provider that has within a short time, emerged as a reference point in recruitment services and technical manpower support…” Source: RevenueBase Database · checked Sep 20, 2026
20	Cakasa Maintenance Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	51-200	52 contacts →
	Indirect evidence “Cakasa Maintenance Services Limited is a global oil servicing company in Nigeria, with Head Office in PortHarcourt.” Source: RevenueBase Database · checked Sep 20, 2026
21	OIL Quest International Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	201-500	50 contacts →
	Indirect 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
22	Ashbard Energy Company Limited	Indirect evidence	Port - Harcourt, NigeriaHQ checked Sep 20, 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 20, 2026
23	Field Offshore Design Engineering LTD	Indirect evidence	Lagos, NigeriaHQ checked Sep 20, 2026	51-200	48 contacts →
	Indirect evidence “Oil and Gas servicing company.” Source: RevenueBase Database · checked Sep 20, 2026
24	NEW Energy Services Company Limited	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 20, 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 20, 2026
25	Fedoz Nigeria Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 20, 2026	201-500	41 contacts →
	Indirect evidence “Fedoz Nigeria Limited (FNL) is a wholly indigenous oil and gas services company specializing in Engineering, Procurement, Construction, Installation, and Maintenance (EPCIM).” 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: offshore well 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 offshore well services.
Partial evidence: Its own public description names part of offshore well services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore well 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 414 offshore well services based in Nigeria

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Offshore well services based in Nigeria at a glance

As of Sep 20, 2026

12.1%Verified-email coverage

18.5Average contacts per company

11-50Median size (employees)

28.5%Largest-city concentration · Port Harcourt

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

177

51-200

112

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 414 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 offshore well 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 Nigeria whose own description of what they do matches “offshore well 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 offshore well 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 offshore well services, 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, 923 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.

Offshore well services by metro

Offshore well services in Port Harcourt118
Offshore well services in Lagos85

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 offshore well 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 offshore well services are there based in Nigeria?

RevenueBase identified 414 offshore well services 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 offshore well services?

Port Harcourt leads with 118 headquartered companies, followed by Lagos (85) and Lagos State (22).

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 923 verified decision-maker contacts tracked across these 414 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.