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General enquiries
Tel. +45 7916 6666


Semco Maritime
Esbjerg Brygge 30
DK- 6700 Esbjerg

Rig upgrades
and modification

Refurb, refit or upgrade your rig!

We facilitate complete rig upgrading solutions and assist with the complete spectrum of Out Of Service (OSS) yard stay.


Rig upgrades and modification

Extending your operational time

We facilitate complete rig upgrading solutions and assist with the complete spectrum of Out Of Service (OSS) yard stay. In ascertaining the condition of the structure, machinery installations, equipment and appliances, we can manage your Special Periodical Survey (SPS) from the initial survey, conceptual design, engineering, planning, the full-scope execution and installation as well as complete commissioning. In order to minimise the risk of injuries during project execution we use a comprehensive HSE system that covers all relevant procedures, routines and systems during operations.

Flexibility and mobility
  • We enable you to extend your operational time by limiting downtime.
  • Our engineering teams encompass all engineering disciplines.
  • HVAC, mechanical, piping, structural, electrical, etc.
Accommodation modules

Our purpose-built accommodation modules are designed for comfort. From mudlab modules to high-tech engineering cabins, our units meet the tough offshore requirements.

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Mechanical, structural and piping

In-house structural engineering competences with offshore experience - we make sure that your quality solutions are delivered on time and on budget.

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HVAC specialists
Customized HVAC solutions, modification of installed systems and service of your existing HVAC system. Our engineers have industry experience from onshore and offshore installations, rigs and vessels.
Scaffolding and rigging

Our experienced teams are experts in erecting scaffolds onshore and offshore for all applications within the oil & gas, marine and industrial markets.

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Shipyard in a box:

Flexible concept of rig and vessel upgrading onshore and offshore

Our shipyard in a box concept gives you maximum mobility and flexibility when it comes to asset upgrading. It also includes preventive maintenance.

Time spent in a yard can be considerably minimized by our preventive maintenance program performed offshore while your asset is still in operation.

Drilling equipment

All you need

Replacement of driller's cabins with skid-mounted units and connecting them to new control cabinets around the rig via all-new electrical, pneumatic and hydraulic systems.

Fire and gas systems

Fighting fires in tough environments

  • Emergency shutdown systems (ESD)
  • Over pressure protection systems (OPPS)
  • High integrity protection systems (HIPS)


We are specialise in your asset

Contact us to find out how we can support your operations!

Simon Wall

Semco Maritime A/S
Esbjerg Brygge 30
6700 Esbjerg

Robert Thoft Christensen

Head of Projects, Rig and Marine

Semco Maritime AS
Hanøytangen 130
5310 Hauglandshella