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Mohn Drilling Track Record – Operations
Mohn Drilling (MD) is the sole supplier of offshore ROV, air diving, and saturation diving in Southern Argentina offshore Tierra del Fuego since the year 2000. Two main Clients; Enap and Total Austral.
Total Austral: first 10-year contract from 2000-2010, renewed to the year 2025. Dive team onboard 365 days per year. Air diving, saturation diving, and ROV services from DSV Skandi Patagonia. The partner is DOF Subsea. MD owns and operates air & saturation diving systems and WROV system. The WROV is an Argus Mariner XL.
Enap: 5-year contract from 2018, extended throughout 2026. Our partner is Bahia Grande. Air diving, saturation diving, and ROV services from DSV Normand Commander. MD owns and operates air & saturation diving systems and WROV system, divers on a call-out basis. The WROV is an Argus Mariner XL.
The work scope for both set-ups includes annual inspections, maintenance and repair of platforms, subsea production stations, and pipelines, in addition to various installation and light construction work.
In addition to the general inspection, maintenance, and repair work which are performed all the year around the following special projects have been undertaken. These projects involved sat diving, 24 hours/day air diving, and ROV services.
Total: Fenix Development. Spools and tie-ins, 24” and 4”. Saturation diving and ROV.
Total: Sleeper installation, ROV works from Normand Commander.
ENAP: ROV pipeline and platform inspections from Normand Commander.
Total: Fenix Development. Spools and tie-ins, 24” and 4”. Saturation diving and ROV.
ENAP: pipeline works from Normand Commander. Sat diving + ROV.
Total: ROV Pipeline survey from Skandi Patagonia
ENAP: Flexible riser changeout from Normand Commander. Sat diving + ROV.
YPF: Jan – Feb, May SBM inspection and remedial works from Skandi Patagonia,
San Sebastian Bay
Total: April, ROV Pipeline survey of Vega 24’’ line from Skandi Patagonia.
YPF: August, October – December, SBM remedial works from Skandi Patagonia,
San Sebastian Bay
ENAP: December, ROV Pipeline survey from Normand Commander
ENAP: Nov – Dec: Sat diving campaign form Normand Commander.
Preparatory work for riser installation PIAM and Free Span Correction.
Total:
ENAP: March – June, 83 days: PIAM project.
Installation of 8” guide clamps and 8” riser on AM2 platform in Area Magellanes.
Installation of spoolpieces.
ENAP: ROV Pipeline survey of 6’’ pipe, 70 days
Total: June – July: change out of subsea and floating hoses on SBM.
Total:
August: 24hrs air diving campaign. Inspection of Aries and Carina platforms
October/November: 24 hours air diving campaign. Inspection of Hidra Field installations, including intrafield sealines.
Total:
Argo Subsea stations 1 and 2: Various diving work in connection with plug and abandonment work – for economical and operational reasons it has been decided to plug and abandon the wells at Argo. Sat diving + ROV.
Vega Pleyades 24” ROV pipeline survey.
Argo Subsea Stations 1 and 2: wellheads inspection and TOV (Tele Operated Valves) change out. Sat diving + ROV.
Aries 24” pipeline free span correction. Sat diving and ROV
Total:
Argo Subsea Stations: change out of TOVs (Tele Operated Valves) to re-establish remote operation. Sat diving + ROV.
ROV drill support from drilling rig Noble Houston Colbert, ongoing to June 2016.
SBM: change of subsea hose, rectification of anchor chains + inspection
Air diving
Vega Pleyade: tie in of 24” line + 4” MEG line, metrology.
Sat diving + ROV
Stinger checks on board PJW3000 during 24” pipe laying from shore to Vega Platform
Air diving (Swiber)
Total:
ROV support during drilling operations
ROV inspection on Argo Subsea stations and platforms
Total:
Feb/Mar: Inspection of leaks on production pipeline at Argo Subsea stations. Change out of 2 pods. Sat diving + ROV
ROV Inspection of leaks at Argo Subsea stations
ROV inspection of platforms incl. FMD
Oct/Nov: Inspection/metrology as part of preparation for disconnection and replacement of spool piece.Sat diving + ROV
Total:
Change out of floating hoses at SBM
24 hrs air diving
Total:
Free span survey and rectification on 18” Aries and 24” Carina pipelines.
Sat diving + ROV
Platform inspection by ROV
Total:
Change-out of SBM for Apache, San Sebastian Bay, Tierra del Fuego, Argentina.
24 hrs air diving
Total:
Argo subsea stations: inspection, anode installation and install new hose between Argo 1 and 2.
Sat diving + ROV
Total:
Argo 2: one well head pod changed out. Defective hydraulic connectors on wellheads changed out on Argo 1 and 2.
Sat diving + ROV
Change out of risers at AM2 and AM3 platform for Sipetrol.
Metrology, fabrication and installation of rigid spool-piece at AM3-BRM.
Sat diving + ROV
Connect flexible risers on DU-1 and DU-2 platforms to new 8” pipeline including rigid pipeline elbow for ENAP. Sat diving + ROV
Total:
Repair of 6 5/8” gas lift line and install new 8 5/8” riser on Anguila 1 platform for ENAP. Sat diving + ROV
Removal and recovery of 8” riser AM3 platform, removal of flexible spool, install blind flanges of abondened 8” pipeline, removal of AM2 flexible line etc, Sipetrol.
Sat diving + ROV
Flooded Member Detection on Hidra Centre and Hidra North platforms.
Sat diving + ROV
Changed out one wellhead pod at Argo 2 subsea station. Sat diving + ROV
Annual platform inspection/free span surveys by ROV
Total:
Installed repair clamps on pipeline from DU-1 to DU-2 at Dungenes Field for ENAP.
Sat diving + ROV
Free span rectification/platform inspection by ROV
Total:
Installed 8” Plidco repair clamps on risers, AM2 platform for Sipetrol.
Sat diving + ROV
Total:
All diving in connection with the installation of Carina and Aries platforms and associated pipelines for McDermott. The work also included installation of Tee Structure and tie-ins of the 18” and 24” pipelines and MEG lines to the platforms and Tee Structure.
Sat diving + ROV
Total:
Change out 10” flexible spool at Poseidon Field for Sipetrol.
Sat diving + ROV
Intervention on Argo subsea stations.
Sat diving + ROV
Total:
Pipeline freespan rectification.
Intervention on Argo 1 and Argo 2 subsea stations – change out umbilicals and connectors.
Sat diving + ROV
Change out subsea hoses on SBM, Hidra Field.
24 hrs air diving.
Total:
Core Drilling from DSV Skandi Patagonia.
Change out of SBM at Hidra Field, offshore Tierra del Fuego.
24 hrs air diving.
Intervention on Argo subsea stations – inspection and repair of hydraulic leaks.
Sat diving + ROV
Total:
Core Drilling from DSV Skandi Patagonia.
Change out of SBM at Hidra Field, offshore Tierra del Fuego.
24 hrs air diving.
Intervention on Argo subsea stations – inspection and repair of hydraulic leaks.
Sat diving + ROV
Total:
Grout repair of 28 platform members for Maersk Oil, Danish sector, North Sea
Total:
Saturation diving and ROV work offshore Egypt/ Red Sea for Gupco/Petrojet, grouting, pipeline rectification, debris removal. ROV: Argus Mariner.
Total:
Trenching and cable laying in North Sea, for Alcatel Kabel Norge with CapJet 1000.
Sat diving, ROV work and trenching offshore Egypt from August 1999 to February 2000. ROV: Argus Mariner.
Total:
Supply services/ROV support, North Sea.
Installation of risers/ROV support for pipeline repair operations at Åsgard/Visund for Statoil and Norsk Hydro. ROV: Argus Mariner.
Total:
From October 1997 to July 1998: diving and ROV operations for Quatar National Navigation & Transport offshore Quatar.
Installation of strengthening clamps on J-tubes, Troll B Platform, for Stolt Comex
ROV support for various construction work in North Sea for Stolt Comex, Esso, EMC, Coflexip Stena, Racal Survey and others.
Location and recovery of ditched Sea Harrier aircraft off Tunisian coast for UK Ministry of Defense, using side scan sonar, ROV and ship’s crane. ROV: Argus Mariner.
Total:
ROV/construction support for various clients: Stolt Comex, Noordhoek Diving, Transocean, Amoco, Norsk Hydro. ROV: Argus Mariner.
Mohn Drilling AS is a diving and ROV contractor based in Bergen, Norway, and the main area of activity is offshore Tierra del Fuego, Argentina.
Mohn Drilling AS is a diving and ROV contractor based in Bergen, Norway, and the main area of activity is offshore Tierra del Fuego, Argentina.