TRACK
RECORD

TRACK
RECORD

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 year 2000. Two main Clients; Enap and Total Austral.

Total Austral: first 10-year contract from 2000-2010, renewed to 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 a Argus Mariner XL.

Enap: 5-year contract from 2018 with 3 yrs option. 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 call-out basis. The WROV is a 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 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.

2020

Total:

YPF: Jan – Feb, May SBM inspection and remedial works from Skandi Patagonia,

San Sebastian Bay

2019

Total:

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.

2018

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.

2017

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.

2016

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

2015

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)

2014

Total:

ROV support during drilling operations

ROV inspection on Argo Subsea stations and platforms

2013

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

2012

Total:

Change out of floating hoses at SBM

24 hrs air diving

2011

Total:

Free span survey and rectification on 18” Aries and 24” Carina pipelines.

Sat diving + ROV

Platform inspection by ROV

2010

Total:

Change-out of SBM for Apache, San Sebastian Bay, Tierra del Fuego, Argentina.

24 hrs air diving

2009

Total:

Argo subsea stations:  inspection, anode installation and install new hose between Argo 1 and 2.

Sat diving + ROV

2008

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

2007

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

2006

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

2005

Total:

Installed 8” Plidco repair clamps on risers, AM2 platform for Sipetrol.

Sat diving + ROV

2003-2005

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

2003

Total:

Change out 10” flexible spool at Poseidon Field for Sipetrol.

Sat diving + ROV

Intervention on Argo subsea stations.

Sat diving + ROV

2002

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.

2001

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

2001

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

From 1996 to 2001 - Projects with DP Support Vessel Bergen Viking:

2000-2001

Total:

Grout repair of 28 platform members for Maersk Oil, Danish sector, North Sea

2000

Total:

Saturation diving and ROV work offshore Egypt/ Red Sea for Gupco/Petrojet, grouting, pipeline rectification, debris removal. ROV: Argus Mariner.

1999

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.

1998

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.

1997

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.

1996

Total:

ROV/construction support for various clients: Stolt Comex, Noordhoek Diving, Transocean, Amoco, Norsk Hydro. ROV: Argus Mariner.