Offshore drilling services · Filyos & Çaycuma, Türkiye
Riser maintenance. Maintenance planning. Reactivation.
Mod Offshore maintains and inspects marine drilling risers and prepares them for recertification, works on SPS and maintenance planning for drillships, and supports drillship reactivations. Our centre is on Türkiye's Black Sea coast: our facility at Filyos Port and our office in Çaycuma.
From the surface to the seabed
2,000 m Water depth · illustrative
A drillship floats on the surface. The well is on the seabed.
Between them hangs the marine drilling riser: a string of steel joints, coupled end to end.
- Telescopic joint
- Riser joint
- Buoyancy module
In the Black Sea, that can mean around 2,000 metres of water.
Each joint carries load and pressure, and the auxiliary lines that run alongside the main tube.
- Choke & kill lines
- Booster line
On the seabed, the riser meets the blowout preventer.
- Flex joint
- Blowout preventer (BOP)
Every riser joint has to come back up.
Inspected, repaired where needed and tested before it returns to sea.
That work is what we do.
Ashore
Filyos Port, Zonguldak
Our riser maintenance facility is at Filyos Port on Türkiye's Black Sea coast — close to the offshore operations it serves.
01Service
Riser Maintenance & COC
Marine drilling risers must be inspected and recertified at set intervals to stay in service. We take riser joints through the full maintenance cycle and compile the inspection and test records required for the Certificate of Conformity (COC).
Carried out at our Filyos Port facility, in partnership with Oil States Industries.
- 01 / 09
Disassembly
The joint is taken apart so every component can be reached.
- 02 / 09
UHP washing
Ultra-high-pressure water strips marine growth and old deposits.
- 03 / 09
Blasting
Surfaces are blasted back to clean steel.
- 04 / 09
NDT
Welds and critical areas are examined by non-destructive testing.
- 05 / 09
Weld repair
Findings are repaired by welding and examined again.
- 06 / 09
Pressure testing
Lines are pressure tested and the results recorded.
- 07 / 09
Coating
A new protective coating is applied.
- 08 / 09
Reassembly
The joint is rebuilt and checked.
- 09 / 09
COC records
Inspection and test records are compiled for the Certificate of Conformity.
We manage the full scope, including specialist steps such as blasting and coating, and remain the client's single point of responsibility.
02Service
SPS & Maintenance Planning
Every piece of equipment on a drillship needs a defined maintenance routine, from daily checks to the Special Periodic Survey (SPS) every five years. We support the preparation of these plans.
- 01 / 05
Daily
What is checked every day.
- 02 / 05
Monthly
Work that is due every month.
- 03 / 05
Quarterly
Work that is due every quarter.
- 04 / 05
Annual
Work that is due once a year.
- 05 / 05
SPS · 5-yearly
The Special Periodic Survey, every five years.
SPS planning
We work on the maintenance content of the five-yearly SPS, structured around the vessel's equipment hierarchy.
Vessel maintenance mapping
We map routine maintenance across the vessel, equipment by equipment: what is checked every day, and what is due monthly, quarterly and annually.
03Service
Reactivation Projects
A drillship returning to service after a change of ownership needs modifications, commissioning and preparation before it can start work. We support that process.
Operations readiness
Modifications
Modifications required for return to service.
Commissioning support
Support while the vessel is commissioned.
Preparation for start of operations
Preparation before the drillship starts work.
Mod Offshore at a glance
- 2015Group roots: Mod Industrial Services founded
- 2023Mod Offshore established
- 2024Partnership with Oil States Industries
- 65People in our team
- 2Facilities: Filyos Port and Çaycuma
Who we work with
Our clients include:
- Drilling contractors
- Offshore equipment manufacturers (OEMs)
- Main contractors
Filyos · Çaycuma · Zonguldak
Facilities & Operations
We work from two sites in Zonguldak, on Türkiye's Black Sea coast: our facility at Filyos Port and our office in Çaycuma.
Filyos Port facility
Riser maintenance is carried out here, in partnership with Oil States Industries.
Çaycuma facility
Our Çaycuma facility is the office for the whole team. Our engineers run their projects here, in a comfortable, high-quality working environment.
Why Filyos
- Filyos is the onshore base of Türkiye's Black Sea gas development.
- Being at the port means equipment and people move between vessel and facility in a short time, without long-haul transport.
- We invested in the region to work alongside the offshore operations we serve.
Our head office is in Çekmeköy, Istanbul.
Work outside Türkiye
We have also worked outside Türkiye. In Las Palmas, Spain, Mod Offshore carried out flex joint maintenance in cooperation with Oil States Industries.
Who we are
About Mod Offshore
Mod Offshore is a Turkish offshore services company with its head office in Istanbul, a facility at Filyos Port and an office in Çaycuma.
Our story
Mod Industrial Services started in 2015 with services for refineries in Türkiye, and later expanded to petrochemical plants.
When natural gas was found in the Black Sea and offshore activity in Türkiye grew, the group moved into offshore work. To enter the sector with proven methods, the group chose to partner with an established international equipment manufacturer.
Mod Offshore was established in 2023 to take on the group's offshore work. Since 2024, that work has been delivered by Mod Offshore.
Partnership with Oil States Industries
Oil States Industries is an international manufacturer of offshore drilling and subsea equipment.
Mod Offshore has worked in partnership with Oil States Industries since 2024.
Riser maintenance at our Filyos Port facility is carried out in this partnership, and we have also worked together outside Türkiye, in Las Palmas.
An independent Turkish company
Mod Offshore is an independent Turkish company. We work for drilling contractors, equipment manufacturers and main contractors.
Health, safety and environment
HSE is a separate function in our organisation and reports directly to the General Manager.
The Mod group
Mod Offshore was set up by the team behind Mod Industrial Services.
Back to the surface
Talk to our team.
For riser, planning or reactivation work, write to us or call our head office in Istanbul.
Head office
Mod OffshoreÖmerli Mah. Beykoz Cad. No:15/1
34799 Çekmeköy / İstanbul
Türkiye
Filyos Port facility
Filyos Port, Zonguldak, Türkiye