22:59:22 New York, NY
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Subsea BOP & Well Control Maintenance Specialists
Subseaquence delivers specialised offshore engineering and maintenance services to the world’s leading drilling contractors. With proven expertise in BOPs, subsea systems, and well control equipment, we ensure every operation is performed safely, reliably, and to the highest standards.
When it comes to well control, experience matters. With over 12 years of demonstrated performance, Subseaquence has refined its capabilities through over 1000 operations, providing customers with confidence, consistency and experience.
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With over 1,000 completed projects and a perfect safety TRIR of 0.00%, we combine technical excellence with an unwavering commitment to safety. Our comprehensive service offering includes project management, in-between well maintenance (IBWM), subsea inspections, commissioning, and Special Periodic Surveys (SPS), ensuring every operation is executed with precision and reliability.
Since 2013, we have partnered with leading drilling contractors across platforms, jack-ups, semi-submersibles, and drillships, delivering tailored solutions that meet the unique demands of each offshore environment. Headquartered in the UK and operating across global offshore locations, Subseaquence stands for expertise, reliability, and excellence beneath the surface.
At Subsequence, our team of 30 engineers sets the industry standard. With unmatched expertise and a culture of collaboration, they push each other to innovate, solve complex challenges, and deliver outstanding results. Together, their experience, dedication, and teamwork make us the best in the business.
1000th Project
“For over 12 years, Subseaquence has been turning bold ideas into world-class subsea solutions. Today, we’re celebrating our 1,000th project—a milestone made possible by our amazing team and partners. Whatever your challenge, we’re ready to help you take the next step with confidence.”
Team of 30 industry renowned well control specialists
“Unmatched Expertise, Delivered on Demand”
Subsequence works exclusively with exceptional, industry-renowned talent, engaging leading professionals on a contract basis to deliver world-class results. Our model allows us to hand-select the very best specialists for each project, combining deep expertise, creative excellence, and proven industry credibility. This approach ensures unmatched flexibility, efficiency, and consistently high standards, enabling Subsequence to deliver outstanding work that meets the demands of the most ambitious and complex briefs.
Our team includes specialists for all types of equipment.
‘OEM’s specialist for a fraction of the cost’
Whatever type of equipment your project requires, our team has the expertise to support it. We work with several ex-OEM professionals who bring extensive subsea experience and in-depth technical knowledge. These experts are often deployed directly to jobs, providing high-quality solutions while operating at a fraction of the typical OEM cost. Their hands-on experience allows them to quickly diagnose, maintain, and optimise equipment, ensuring projects run smoothly and efficiently. By combining industry expertise with cost-effective deployment, we deliver reliable, high-performance results without compromising on quality, helping clients achieve their objectives on time and within budget.
Surface BOP’s platforms and Jack Ups
Written procedures and quality plans included
We specialise in surface BOPs for platforms and jack-ups, delivering unmatched expertise and operational excellence. Our project managers, with extensive hands-on experience, oversee every task with rigor, following comprehensive written procedures and quality plans. All processes comply fully with API 53, ensuring inspections, maintenance, and operations meet the highest industry standards.By combining technical know-how with strong project management, we deliver efficient, safe, and reliable results. With thorough documentation, strict quality controls, and experienced personnel on every project, clients can trust us to execute surface BOP operations seamlessly, maintain regulatory compliance, minimize risk, and keep projects on schedule and within budget.
BOP Electrical & Hydraulic Control Units
Subseaquence, we pride ourselves on decades of expertise in offshore BOP maintenance and are expanding to provide full maintenance services for BOP control units and MUX multiplex systems from leading manufacturers including Cameron, NOV, and GE-Hydril. Our team of ex-OEM specialists brings deep, hands-on knowledge, delivering OEM-level quality and reliability at a fraction of the typical cost.
Every project is executed under robust procedures, quality plans, and strict API standards, ensuring consistent, high-quality results. By combining BOP, control unit, and MUX system maintenance, Subseaquence offers a complete, cost-effective solution for offshore operations reducing downtime, extending equipment life, and giving clients the confidence of relying on experienced professionals.
End-to-End BOP and Control Unit Maintenance with OEM-Level Expertise at Lower Cost
Subsequence works with a curated network of 30+ industry-leading contractors, bringing together exceptional talent across technical, creative, and operational disciplines. Rather than relying on a fixed in-house team, we assemble bespoke project teams for every brief — hand-selecting the most suitable specialists to match each scope.
This flexible model gives our clients direct access to senior-level expertise, proven industry credibility, and deep practical experience. The result is greater agility, efficient delivery, and consistently high standards, enabling Subsequence to support even the most ambitious and complex projects with confidence.
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