Oil & Gas
Engineering upgrades, modifications, and custom equipment design for oil and gas assets with operational support and code compliance, delivered by a scalable team that prioritises safety.
Keeping your assets running safely and efficiently
From engineering upgrades and equipment modifications to operational support and life extension studies, Subco delivers the engineering your oil and gas assets need — without the overhead of growing your team. We work to recognised codes and class requirements, packaging everything into fixed-price work packs with full verification so you maintain compliance and keep operations moving.
Providing safe, compliant solutions
From brownfield modifications and FPSO pipework reroutes to bespoke equipment design and demobilisation planning, Subco Engineering accelerates engineering phases to meet shutdown windows and minimize downtime. Our multidisciplinary team of experienced professionals provides safe, compliant solutions backed by detailed technical documentation; reducing risk, extending asset life, and improving operational efficiency.
What we deliver
We deliver scoped, fixed‑price workpacks that plug straight into your project plan. Clear deliverables, documented assurance, and end‑to‑end ownership from concept to certified outputs. Our ISO‑aligned processes (ISO 9001 & ISO 27001) and client portal provide full visibility: better scoping, fewer surprises, and total accountability.
Brownfield asset life extension
Remnant life & fatigue checks, corrosion/erosion allowances, modification design, and compliance packs.
FPSO & topsides modifications
3D point‑cloud clash checks, pipework reroutes, supports, and tie‑ins; installation/commissioning workpacks aligned to ASME/API/UK regs.
Pressure systems & pipe stress
Analysis and verification to ASME B31.x; isometrics, supports, and MTOs for safe execution.
Lifting & handling verification (LOLER/PUWER)
Lift studies, temporary works, spreader frames, pad‑eyes, subsea clamps, and sea‑fastening removal plans.
Structural integrity & fatigue
FEA of frames, foundations, and interfaces; remnant life and upgrade options for critical items.
Demobilisation & de‑inventory
Equipment recovery sequences, lift plans, preservation, waste‑stream notes, and CoP‑ready documentation (vessels and FPSOs).
Focussed on delivery
As trusted partners for operators and suppliers, we help clients leverage advanced engineering expertise to deliver faster and strengthen their offering to end customers. Our team has executed FPSO workpacks, topsides pipework analysis, and deck-level temporary works for campaign upgrades and integrity remediation. Combining client collaboration with our engineering experience to deliver optimum solutions that safeguard production and reduce risk.
Meet our team
