Rotech Subsea are responsible for over 500 projects worldwide since 1994. Our track record demonstrates the wide range of locations and project types we have worked on in the Pre-Commissioning, Commissioning, Decommissioning and IRM stages of both the Renewables and Oil&Gas sectors.
| Project | Date | Scope of Work & Tooling | Location | Seabed Material | Water depth |
| C24-075 | June to July 2024 | Cable De-burial & Post-lay Trenching RS2 CFE System |
North Sea | Sand | 21m |
| C24-058 | July 2024 | Cable & Omega Joint Post-lay Trenching RS2 CFE System |
North Sea | Loose Sand | 30m |
| C23-233 | February to July 2024 | HDD Pit Excavation TRS1 CFE System |
USA – Coastal Virginia OWF | Sand & Gravel | 6m – 8m |
| C23-175 | May & June 2024 | Cable Remedial Lowering RS2 CFE System & RS3 Hybrid Jet Trencher |
SNS – Sofia OWF | Sand, Gravel & Hard Clay | 3.5m - 10m |
| C23-214 | April & May 2024 | Cable De-burial, Cutting, Recovery & Post-lay Trenching TRS1 CFE System & RSG-C Subsea Grab & Cutter |
North Sea (Dutch Sector) | Sand | 25m |
| C23-147 | January to March 2024 | Interconnector Remedial Burial Works TRS1 LD Jet Trencher |
North Sea | Silty Sands to Stiff Clay | 10m to 65m |
| C23-232 | November 2023 to February 2024 | Umbilical De-Burial & Joint Post Lay Burial RS2/RS2-3 Hybrid Jet Trencher |
Southern North Sea | Extremely hard clay with calcarenite areas | 28m |
| C23-033 | September 2023 to March 2024 | Umbilical De-Burial & Joint Post Lay Burial RS2 CFE System |
North Sea | Silty Sand, Sand, Firm to Very Stiff Clay | 15m |
| C22-197 | April to August 2023 | Sandwave / Route Clearance / Cable Trenching TRS2 CFE System / RS2-3 Hybrid Jet Trencher |
CFXD OWF | Soft Soil/Sand/Stiff Clay | 12m - 40m |
| C23-060 Case Study |
August & September 2023 | Pipeline De-burial TRS1 CFE System |
Danish Sector, North Sea | Silty Sand | 45m |
| C23-141 | August 2023 | Cable Trenching RS2-3 Hybrid Jet Trencher |
North Sea | Coarse Sand/Gravel & High Strength Clay | 3m to 6m |
| C23-097 | August 2023 | Cable Trenching TRS1LD Jet Trencher |
Southern North Sea | Soft Soil/Sand | 10m |
| C23-065 Case Study |
July to August 2023 | Cable Remedial Lowering TRS1 CFE System |
USA | Sand | 5m to 10m |
| C23-106 | July 2023 | Pipeline De-burial TRS2 CFE System |
North Sea | Sand | 22m |
| C23-090 Case Study |
June to July 2023 | Cable De-burial and Debris Clearance RS2 CFE System & RSG Boulder Grab |
Atlantic Ocean | Sand & Debris | 30m |
| C23-080 | May 2023 | Cable Trenching TRS1LD Jet Trencher |
North Sea | Sand | 28m to 36m |
| C22-193 Case Study |
March to May 2023 | Cable IRM / Cut & Recovery TRS2 CFE System & RSG-C Subsea Grab & Cutter |
North Sea | Extremely Dense Medium to Silty Sand |
22m to 26m |
| C23-048 Case Study |
April to May 2023 | Cable Trenching & Rock Removal TRS1LD Jet Trencher & RSBG Boulder Grab |
Seagreen, North Sea | Silty Sand | 3m to 4m |
| C23-084 | April to May 2023 | Cable Remedial Lowering TRS1 CFE System |
USA | Sand | 8m to 12m |
| C23-014 | April 2023 | Pipeline De-burial & Rock Dump Dispersal TRS2 CFE System |
North Sea | Rock Dump | 91m |
| C21-145 | April 2023 | Pipeline De-burial TRS1 CFE System |
North Sea, Danish Sector | Silty Sand | 65m |
| C22-183 | February to April 2023 | Interconnector Remedial Burial TRS2 CFE System |
North Sea | Silty Sands and Clay | 3m – 65m |
| C23-051 | March to April 2023 | Pipeline De-burial TRS1LD Jet Trencher |
North Sea | Sand | 30m |
| C22-204 | March 2023 | Umbilical Trenching RS2-3 Hybrid Jet Trencher |
North Sea | Medium Dense Silty Sands, Clay Layers | 110m - 121m |
| C22-178 | December 2022 to January 2023 | Pipeline De-burial TRS1 CFE System |
North Sea | Loose to Medium Dense Silty Sands | 35m - 39m |
| C22-157 | September to December 2022 | Umbilical Trenching RS1 LD-3 Hybrid Jet Trencher |
Black Sea | Sand & Clay | 2m to 20m |
| C22-090 | October to December 2022 | Cable Trenching – Phase 1 TRS1 CFE System |
Vineyard OWF, Atlantic Ocean | Sand, Medium Sand | 5m to 10m |
| C22-024 | March to December 2022 | Cable Trenching TRS2 CFE System & Jetting Pack |
Bahrain / Caspian Sea | Silty Sand, Gravel & Clay | 2m to 8m |
| C21-147 | September to November 2022 | Cable Trenching TRS1LD Jet Trencher |
CFXD OWF | Soft Soil & Stiff Clay | 12m – 40m |
| C21-147 | March to November 2022 | Sandwave / Route Clearance TRS2 CFE System |
CFXD OWF | Soft Soil / Sand | 12m – 40m |
| C21-147 | March to September 2022 | Debris Clearance RSBG – Subsea Grab |
CFXD OWF | N/A | 12m – 40m |
| C22-098 | October 2022 | Cable de-burial and Post-lay Trenching TRS2 CFE System & RSG-C Subsea Grab&Cutter |
Nordegrunde OWF | Loose Sand | 2m - 10m |
| C22-094 | October 2022 | Burial of 5 inline cable joints RS1-3 Hybrid Jet Trencher |
Ostwind 2 OWF | Soft Sand & Stiff Clay | 19m - 31m |
| C22-174 | September 2022 | Pipeline De-burial RS1 CFE System |
Southern North Sea | Soft Silty Sand | 35m |
| C22-138 | September 2022 | Cable De-burial and Post-lay Trenching TRS2 CFE System |
Taiwan - Greater Changhua OWF | Silt & Sand | 18m - 28m |
| C22-126 | August 2022 | Cable Repair TRS2 CFE System & RSG-C Subsea Grab&Cutter |
Wintershall / North Sea | Loose Sands | 35m – 37m |
| C19-144 ph1. | June-July 2022 | Sandwave Clearance TRS2 |
Yunlin OWF. Taiwan | Sand waves | |
| C19-144 ph2. | Mar-nov 2021 | Sandwave Clearance TRS2 |
Yunlin OWF. Taiwan | Sand waves | |
| C19-144 ph3. | Mar'21 - sept'22 | Sandwave & Route Clearance TRS2 |
Yunlin OWF. Taiwan | Sand waves | |
| C19-147 ph1. | Mar'22 - sept'22 | Sandwave & Route Clearance TRS2 |
Yunlin OWF. Taiwan | Sand waves | |
| C22-136 | August 2022 | F/O Cable Trenching TRS1LD Jet Trencher |
Belgium / SNS | Sand / Gravel | 35m & 40m |
| C22-089 | July 2022 | F/O Cable Trenching TRS1LD Jet Trencher |
Offshore Lowestoft | Sand / Gravel | 2.5m - 24m |
| C21-189 | July 2022 | Export Cable De-burial, Cut and Recovery & Post Lay Trenching RS1-3 Hybrid Jet Trencher & RSG-C |
Gwynt Y Mor | Silty Sand, Glacial Till & Gravelly Clay | 2.6m - 11m |
| C22-073 | June 2022 | 8"Pipeline Trenching TRS1 |
Trinidad & Tobago | Sand & Soft Clay | 17m -27m |
| C21-087 Case Study |
June 2022 | Cable Trenching TRS1LD Jet Trencher |
F2 OWF - Taiwan | Silty Sands, Clays, Very Dense Gravel & Cobbles. | 35m - 55m |
| C22-022 Case Study |
June 2022 | Cable De-burial and Post-lay Trenching RS2 |
St Nazaire OWF | Soft Sand | 27m |
| C22-087 | May 2022 | Cable De-burial, Cut and Recovery & Post Lay Trenching RS2-3 Hybrid Jet Trencher & RSG-C |
East Anglia One OWF | Silty Sands / Very Dense Gravelly Sand, Stiff Clays | 29m - 50m |
| C22-035 | April 2022 | Cable Lowering / Remedial Burial RS1-2 Hybrid Trencher |
Riffgat, Dolwin 1 & 2, Nordergrunde | Medium Dense to Very Dense Sand | 3m - 13m |
| C22-032 | April 2022 | Cable De-burial, Cut and Recovery & Post Lay Trenching RS2-3 Hybrid Jet Trencher & RSG-C |
Triton Knoll OWF | Boulder Clay | 12m - 15m |
| C21-191 | January 2022 | Cable Post-lay Trenching TRS1 |
Prinses Amalia Wind Park | Medium Sand | 20m - 25m |
| C21-157 | November 2021 | Berth Clearance TRS2 |
Glasgow, River Clyde | Silty Sand | 13m |
| C20-092 | November 2021 | Cable Joint Burial RS1-3 Hybrid Jet Trencher |
Ostwind 2 OWF | Sandy Soil to Dense Sand | 7m - 45m |
| C21-087 | October 2021 | Cable De-burial & Post-lay Trenching TRS1LD Jet Trencher |
Southern North Sea | Dense Sand | 3m - 15m |
| C21-119 | September 2021 | HDD Duct De-burial & FO Cable Trenching TRS2 |
Atlantic Coast | Fine Sand & Sand Banks | 5m - 12m |
| C21-139 | September 2021 | Cable De-burial, Cutting and Retrieval, Post Lay Trenching TRS1 & RSG Subsea Grab & Cutter |
North Coast of UK | Soft Sand | 80m - 85m |
| C21-103 | August 2021 | Cable De-burial & Post Lay Trenching RS2 |
Luchterduinen OWF | Soft Sand | 20m - 25m |
| C21-110 | August 2021 | Umbilical & Pipeline De-burial & Post Lay Trenching RS2 |
Buchan and Hannay Field | Soft Sandy Clay | 115m - 123m |
| C20-174 | August 2021 | Cable Post Lay Trenching TRS2 & Jetting Pack |
Ameland Export Cable | Loose, Fine Sand & Clay | 2m - 9m |
| C21-100 Case Study |
July 2021 | Pipeline De-burial TRS1 |
IOG Blythe & Vulcan | Soft Sand | 20m - 30m |
| C21-015 Case Study |
April 2021 | Cable Trenching RS2 |
RTE St Nazaire | Gravel and Sand | 4m - 25m |
| C21-040 Case Study |
April 2021 | Cable De-burial & Post Lay Trenching TRS2 |
Brit-Ned Cable Repair #2 | Soft Sand | 40m |
| C20-047 Case Study |
March 2021 to June 2021 | Export & Array Cable Post-Lay Trenching TRS1 & TRS2 |
Changhua OWF / TPC Phase 2 Taiwan | Sand, Silty Sand, Silty Clay & Clay | 18m - 28m |
| C21-044 Case Study |
March 2021 | Cable Remedial Works Including Cutting and Recovery RSG Subsea Grab & Cutter |
Dolwin Alpha, Dolwin OWF | Soft Sand | 30m - 40m |
| C20-182 | January 2021 | Cable Remedial Works Including Cutting and Recovery RS2 & RSG Subsea Grab & Cutter |
Offshore USA | Dense Sand | 35m - 42m |
| C19-158 Case Study |
January 2021 | Umbilical Post-lay Trenching TRS1 |
West Baracouta, Australia | Medium to Coarse Grained Sand | 50m |
| C20-181 Case Study |
January 2021 | Dock Wall Clearance / Silt Removal RS2 |
Nigg, The Highlands | Silty Sand | 10m |
| C20-180 | November 2020 | Cable De-burial & Post Lay Trenching RS2 & RS1LD |
Hornsea 1 OWF | Loose Soil & Clay | 30m |
| C20-151 | November 2020 | Cable Recovery for Repair and Replacement RSG Subsea Grab |
Offshore Denmark | N/A | 30m |
| C20-047 Case Study |
March 2020 to October 2020 | Export & Array Cable Post-Lay Trenching TRS1LD Jet Trencher & TRS1 |
Changhua OWF / TPC Phase 1 Taiwan | Sand, Silty Sand, Silty Clay & Clay | 18m - 28m |
| C20-054 Case Study |
September 2020 | Template & Wellhead Excavation and Backfill. Recovery of PLET into Subsea Basket. TRS2 & RSG Subsea Grab |
Perenco Thames Phase 2 Decom | Sand / Consolidated Rock Dump | 40m |
| C20-008 | September 2020 | Sand wave Clearance & Cable Remedial Works TRS2 & RSG Subsea Grab |
OWF East Coast of UK | Sand waves | 9m to 22m |
| C20-140 Case Study |
September 2020 | Rock Dump Dispersal TRS2 |
Wintershall F16 | Rock dump | 40m |
| C20-158 | August 2020 | Cable Remedial Works Including Cutting and Recovery RS2 & RSG Subsea Grab & Cutter |
OWF East Coast of UK | Soft Sand to Dense Sand | 20m |
| C20-088 | July 2020 | Sand Wave Clearance & Cable Trenching TRS1 |
Triton Knoll OWF | Sand waves / Sand / Dense / Medium | 15m - 25m |
| C20-065 Case Study |
June 2020 | Mono Bucket De-burial TRS1 |
Deutsche Bucht OWF, North Sea | Sand / Loose Dense | 40m |
| C20-016 Case Study |
May 2020 | Flow Tests to Simulate Thrust Pressure Exerted on Dock Wall TRS2-H (2020) |
Liverpool Harbour | N/A | 2m - 8m |
| C19-181 | April 2020 | Pit Clearance & Cable Joint Post-Lay Trenching TRS1 & TRS1LD Jet Trencher |
Borssele OWF, SNS | Medium Sand / Dense Sand / Clay | 5m - 55m |
| C19-019 | January 2020 | Trench Clearing & Cable Post Lay Lowering RS1 |
IFA2 Interconnector (UK Side) | Sand / Silt | 0.6m - 4.5m |
| C19-076 Case Study |
October 2019 | Cable Retrieval to Deck for Decommissioning RSG Subsea Grab |
Norther OWF | N/A | 25m - 33m |
| C19-125 | October 2019 | Remedial Lowering of an HVDC Cable TRS1LD Jet Trencher & Jetting Pack |
IFA2 Interconnector (French Side) | Dense Sand to Stiff Clay | 6m - 23m |
| C19-113 Case Study |
September 2019 | Remedial Lowering of Export / HVDC Cable TRS1LD Jet Trencher & Jetting Pack Project Management of Entire Scope - including Vessel Charter |
Walney Extension OWF | Medium to Dense Sand | 6m - 23m |
| C19-022 | March 2019 to September 2019 | Cable De-burial & Post Trenching - Project 2 TRS1LD Jet Trencher |
SE Coast of UK | Medium to Dense Sand | 1m - 30m |
| C17-155 | August 2019 | Flow Tests to Simulate Thrust Pressure Exerted on Dock Wall TRS2-H (2019) |
Liverpool Harbour | N/A | 2m - 8m |
| C19-022 | May 2019 to August 2019 | Cable De-burial & Post Trenching - Project 1 TRS1 |
SE Coast of UK | Medium to Dense Sand | 3m - 30m |
| C19-077 Case Study |
July 2019 | Cable Post-lay Trenching & Rock Dump Dispersal RS2 |
Borkum Riffgrund OWF | Soft Sand & Soft Clay | 20m - 30m |
| C19-071 Case Study |
July 2019 | Sand wave Clearance for Tracked Trencher & Cable Trenching TRS2 |
Norther OWF | Soft to Medium Dense Sand | 25m - 33m |
| C19-093 | June 2019 | Cable De-burial / Post Trenching & Route Clearance RS1 & RS2 |
Global Tech 1 OWF | Silty Clayey Fine Sand to Medium Dense | 37m - 42m |
| C19-069 | June 2019 | Cable De-burial & Post Trenching - Project 1 RS2 |
Western Link HVDC Irish Sea | Medium Sand | 4m - 10m |
| C18-157 | May 2019 | Cable Lowering / Remedial Work TRS1 |
Race Bank | Soft to Medium Sand | 20m - 30m |
| C19-035 Case Study |
April 2019 | Cable De-burial, Cable Recovery & Post Lay Trenching RS2 & RSG |
50Hz - Baltic Sea | Medium to Dense Sand | 15m - 20m |
| C19-048 Case Study |
April 2019 | Cable De-burial & Post Trenching - Project 2 RS2 |
Western Link HVDC Irish Sea | Medium Sand | 4m -10m |
| C19-024 | April 2019 | Rock Dump Dispersal RS2 |
Dunlin Oilfield | Rock Dump | 150m |
| C19-027 | March 2019 | Riverbed Rectification / High spot Clearance TRS2 |
Bangladesh | Soft / Medium Soil | 3m - 8m |
| C18-178 | January 2019 | Cable Post Trenching & Cable Recovery TRS1 & RSG |
Race Bank OWF | Soft Sand to Dense Sand | 20m |
| C18-095 | December 2018 | Cable Post Trenching TRS1 & Jetting Pack |
Hornsea1 OWF, SNS | Medium, Dense Sand Very Hard Dense Soil | 25m - 60m |
| C17-161 Case Study |
October2018 | Umbilical & Cable Post Trenching TRS1LD Jet Trencher & Jetting Pack |
Safaniya Oil Field, KSA | Firm Clay <250 kPa | 7m - 10m |
| C17-161 | October 2018 | 24" Pipeline Post Trenching TRS1LD Jet Trencher & Jetting Pack |
Safaniya Oil Field, KSA | Soft Clay <250m | 7m - 10m |
| C18-016 Case Study |
September 2018 | 42" Pipeline Post Trenching & Backfill TRS2 |
Manifa Oil Field, KSA | Soft Clay & Fine Sand | 10m -13m |
| C17-161 | September 2018 | 16" Pipeline Post Trenching TRS1LD Jet Trencher & Jetting Pack |
Safaniya Oil Field, KSA | Soft Clay & Dense Sand | 7m - 10m |
| C18-016 | September 2018 | 42" Pipeline Post Trenching TRS2 |
Manifa Project, KSA | Soft Clay | 8m - 12m |
| C18-119 | August 2018 | Cable Post Trenching RS1 |
North Sea Link (NSL) Project | Sand / Medium Sand | 15m - 20m |
| C18-021 | August 2018 | Pipeline Free-span Correction & Umbilical Post Trenching TRS2 & RS1 |
Phong Lan Dai PLD Project Vietnam | Silty Sand & Coarse Sand | 125m - 185m |
| C17-170 | May 2018 | Cable De-burial & Cutting / Retrieval / Rock Dump Removal RS2 & RSG |
CMS (Caithness and Moray) Project | Very Hard Dense Soil / Clay | 22m - 25m |
| C17-170 | May 2018 | Export Cable De-burial & Post Trenching TRS1 & Jetting Pack |
CMS (Caithness and Moray) Project / North Sea | Very Hard Dense Soil / Clay | 20m |
| C18-042 | April 2018 | Cable De-burial & Post Trenching for IRM RS1 |
Offshore Dunkirk, France | Dense Sand | 10m -12m |
| C16-060 | February 2018 | Pontoon Clearance / De-burial RS1 |
Montrose, Scotland | Soft Silty Sand & Mud | 5m - 10m |
| C17-105 Case Study |
December 2017 | LIVE 24" Pipeline Free-span Rectification TRS2 |
Yadana Field, Myanmar, Asia | Soft Clay | 10m - 12m |
| C17-165 | December 2017 | Cable Post Trenching @ Cable Crossing RS1 |
Cobra Cable HVDC Danish Sector / North Sea | Medium / Dense Sand | 20m - 24m |
| C17-134 Case Study |
November 2017 | Export Cable Post Trenching TRS1 & Jetting Pack |
Rentel OWF Belgium SNS | Loose Sand / Firm Clay | 3.5m - 30m |
| C17-109 | November 2017 | De-Burial and Post Trenching of 2 x HVDC Cables and F/O Cable RS1 |
Dolwin3 OWF German Sector | Sand | 27m - 30m |
| C17-079 | November 2017 | Cable Joint De-burial & Post Trenching RS1 |
HDVC Link, Baltic Sea | Granular Sand | 16m - 20m |
| C17-108 | October 2017 | Cable Joint Burial / Cable Post Trenching RS1 |
Borwin3 OWF German Sector / North Sea | Dense Sand | 21m - 23m |
| C17-109 | September 2017 | Cable Post Trenching RS1 |
Dolwin3 OWF German Sector | Medium Sand | 25m - 35m |
| C17-079 | August 2017 | LIVE Cable Remedial Post Trenching RS1 |
HVDC Link Baltic Sea | Granular Sand | 16m - 20m |
| C17-061 | June 2017 | Rock Dump Removal RS1 |
Western Link HVDC Irish Sea | Rock Dump | 20m - 150m |
| C17-061 | June 2017 | Cable De-burial & Post Trenching RS1 |
Western Link HVDC Irish Sea | Medium Sand | 20m - 150m |
| C17-047 | May 2017 | Cable De-burial & Post Trenching TRS2 |
Southern North Sea (SNS) | Dense Sand | 25m |
| C16-054 | April 2017 | Cable Post Trenching RS1 |
Irish Sea West of Duddon Sands OWF | Soft Soil - 20kPa | 30m |
| C17-003 | March 2017 | De-burial & Seabed Preparation TRS1 |
North Sea Race Bank OWF | Soft Sand | 21m |
| C17-025 | March 2017 | Cable Post Trenching TRS2 |
North Sea Race Bank OWF | Soft Soil | 1.5m - 8m |
| C16-086 Case Study |
January 2017 | Export Cable Post Trenching TRS2 |
North Sea Race Bank OWF | Soft Sand | 8m |
| C17-035 | January 2017 | Export Cable Post Trenching TRS1 |
Irish Sea Burbo Bank OWF | Sand & Clay | 11m - 16m |
| C16-002 Case Study |
October 2016 | Cable Ends Post Trenching TRS2 |
Germany Nordergrunde OWF | Soft Silty Sand | 1.5m - 4m |
| C16-050 | October 2016 | Harbour Pontoon Clearance RS1 |
Immingham, England | Soft Silty Sand | 2m - 6m |
| C16-066 | September 2016 | Umbilical De-burial & Post Trenching TRS1 |
Ravenspurn SNS | Medium Soil - 60kPa | 50m |
| C15-038 | August 2016 | Cable De-burial - Out of Service Cables (OOS) TRS1 & Jetting Pack |
Galloper OWF SNS | Stiff Clay - 180kPa | 27m - 36m |
| C15-012 | August 2016 | Cable De-burial & Post Trenching TRS1 |
Irish Sea Burbo Bank OWF | Loose Sand | 11m - 16m |
| C15-012 | July 2016 | Cable De-burial & Post Trenching TRS1 |
Irish Sea Burbo Bank OWG | Sand & Clay | 11m - 16m |
| C15-059 | April 2016 | Cable Post Trenching RS1 |
Isle of Jura, Inner Hebrides | Dense Sand | 5m - 50m |
| C15-002 | November 2015 | Cable De-burial & Post Trenching TRS1 |
Irish Sea, Gwynt y Môr OWF | Soft Sand | 5m |
| C15-001 | August 2015 | Harbour Deepening & Clearance RS1 & RS2 |
Montrose, Scotland | Mud & Soft Silty Sand | 10m |
CABLE TRENCHINGtop
| Scope of Work - Cable Trenching | Location | Seabed Material | Water Depth |
| Cable Post Trenching | Southern North Sea (SNS) | Medium Clay & Chalk | 2m - 35m |
| Cable Pos Trenching | Qatar | Soft Sandy Clay | 65m |
| Cable Post Trenching | North Sea | Sand | 2m - 5m |
| Cable Post Trenching | Mexico | Firm Clay | 30 - 55m |
| Cable Post Trenching - 200mm Dia | North Sea | Soft Clay | 8m - 12m |
| Cable Post Trenching - 6" Cable Conduit | Scotland | Sand & Light Clay | 2m - 10m |
| Cable PostTrenching - 35mm Dia Fibre Cable | Scotland | Sand & Light Clay | 10m - 15m |
| Cable Post Trenching | Germany | Medium Clay | 40m |
| Cable Lowering - BritNed Cable | North Sea | Medium Soft Sand | 70m |
| Cable Post Trenching | Ireland | Cohesive Soil | 4m |
| Cable Post Trenching | Southern North Sea (SNS) | Sand | 30m |
| Pre-Sweeping approaches to Wind Turbines | Belgium | Rock Dump | 20m |
IRMtop
| Scope of Work - IRM | Location | Seabed Material | Water Depth |
| Footprint Excavation | North Sea | Cohesive Soil | 90m |
| Cable De-burial | Southern North Sea (SNS) | Gravelly Clay & Cobbles | 40m |
| Pipeline Trenching | US G.O.M | Soft & Hard Soil | 15m |
| Umbilical Trenching | US G.O.M | Soft & Very Hard Soil | 60m |
| Pipeline Trenching | Norway | Soft Soil | 70m |
| Debris Clearance | India | Rock Dump | 65m |
| Conductor Clearance | US G.O.M | Soft Clay | 91m |
| Cofferdam Excavation | US G.O.M | Sand & Shell Fragments | 33m |
| Seabed Preparation | Turkmenistan | Hard Clay | 61m |
| Drill Cuttings Clearance | China | Mixed Clay | 107m |
| Rock Dump Clearance | Russia | Rock Dump | 50m |
| Drill Cuttings Clearance | Romania | Soft Clay | 95m |
| Toppled Platform De-burial | US G.O.M | Soft Mud & Hard Clay - <140 kPa | 37m |
| Pipeline Trenching | US G.O.M | Soft Clay | 84m |
| Pipeline Excavation - 36" Pipeline | US G.O.M | Soft Mud | 18m |
| VK 20" Visual Inspection | US G.O.M | Mudslide Area | 204m |
| Rock Dump Clearance - 8" Pipeline | North Sea | Rock Dump | 116m |
| Lift Boat Excavation | US G.O.M | Soft Mud | 15m |
| Pipeline Excavation - 12" Pipeline | US G.O.M | Soft Clay & Sand | 120m |
| Pipeline Excavation | US G.O.M | Medium Clay | 167m |
| Cable De-burial - 132mm Dia | North Sea | Sand | 2m - 7m |
| Pipeline De-burial - 10" Dia | Australia | Silt & Sand | 15m |
| Pipeline De-burial - 10" Dia | NW Australia | Silty Sand & Shells | 150m |
| Pipeline Excavation - 24" Dia | US G.O.M | Soft Clay | 60m |
| Pipeline De-burial - 10" Dia | US G.O.M | Firm Clay | 152m |
| Pipeline De-burial - 6" Dia | US G.O.M | Soft Mud | 67m |
| Pipeline De-burial - 12" Dia | US G.O.M | Soft Mud | 80m |
| Pipeline De-Burial - 6" Dia | US G.O.M | Soft Clay | 67m |
| Cable De-Burial & Post Trenching | North Sea | Sand & Silt | 2m - 12m |
| Pipeline De-burial | North Sea | Soft Clay | 140m |
| Valve Cover Clearance | US G.O.M | Soft Clay | 50m |
| Pipeline De-burial | North Sea | Soft Clay | 30m |
| Pipeline De-burial | US G.O.M | Firm Clay | 20m |
| Pipeline De-burial | US G.O.M | Firm Clay | 20m |
| Pipeline Trenching for Repair | US G.O.M | Soft Mud | 187m |
| Pipeline Trenching for Repair | US G.O.M | Soft Mud | 230m |
| Pipeline Trenching for Repair | US G.O.M | Soft Mud | 200m |
| Pipeline Post Trenching - 30" Dia | US G.O.M | Compacted Sand / Clay | 3m |
| Post Hurricane Pipeline Repair | US G.O.M | Mud | 1000m |
| Post Hurricane Repair Work | US G.O.M | Mud | 10m |
| Pipeline Post Trenching - 44" Dia | US G.O.M | Sand | 3m - 6m |
| Post Hurricane Repair Work | US G.O.M | Mud | 20m - 40m |
| Pipeline De-burial for inspection - 32" & 24" Dia | North Sea | Rock Dump Clearance | 110m |
| Pipeline De-burial | North Sea | Sand | 15m - 25m |
| Seabed Preparation & Pipeline Post Trenching - 24" Dia | Egypt | Sand & Soft Clay | 12m - 40m |
| Seabed Preparation for Habitat Installation | North Sea | Sand & Soft Clay | 45m |
| Pipeline De-burial | US G.O.M | Sand | 210m |
| Pipeline De-burial | US G.O.M | Mud | 40m - 60m |
| Pipeline De-burial | US G.O.M | Mud | 290m |
| Pipeline De-burial | US G.O.M | Mud | 75m |
| De-burial of Mine Outfall Pipes & Area Clearance | North Sea | Silt | 14m |
| Freespan Correction | Gulf of Thailand | Mud Waves | 80m |
| Seabed Preparation for Jack-up Rig Spud Cans | Bay of Bengal | Sand | 100m |
| Seabed Preparation for Jacket installation | East Timor Sea | Sands & Clay | 85m |
| Seabed Preparation for Rock dumping | Irish Sea | Silty Sand | 10m |
Decommissioning & Salvage Worktop
| Scope of Work - DECOM | Location | Seabed Material | Water Depth |
| Conductor Excavation | US G.O.M | Sand | 16m |
| Platform Excavation | US G.O.M | Soft Soils | 64m |
| De-burial of a Tunnel Boring Machine | Australia | Sand / Soft Clay | 20m |
| Subsea Assembly | US G.O.M | Hard Clays | 17m |
| Platform Excavation | US G.O.M | Soft Soils | 34m |
| Platform Salvage | US G.O.M | Mud | 183m |
| Wellhead Excavation | US G.O.M | 23kPa | 30m |
| Backfill Removal | US G.O.M | Medium Clay | 55m |
| Caisson Excavation | US G.O.M | Mixed Clay | 43m |
| Caisson Excavation | US G.O.M | Soft Backfill | 42m |
| Caisson Excavation | US G.O.M | Soft to Medium Clay | 54m |
| Platform Excavation | US G.O.M | Soft Clay | 47m |
| Caisson Excavation | US G.O.M | Mixed Clay | 40m |
| Caisson Excavation | US G.O.M | Soft Clay | 95m |
| Platform Leg Excavation | US G.O.M | Mixed Clay | 22m |
| Debris Removal | US G.O.M | Mixed Clay | 40m |
| Caisson Excavation | US G.O.M | Soft Mud | 62m |
| Debris Removal | US G.O.M | Soft Clay | 50m |
| Jacket Excavation | US G.O.M | Medium Clay | 51m |
| Debris Removal | US G.O.M | Soft Clay | 66m |
| Jacket Excavation | US G.O.M | Soft Clay | 72m |
| Deck Salvage Excavation | US G.O.M | Soft Mud | 69m |
| Jacket and Debris Excavation | US G.O.M | Soft Clay | 61m |
| Caisson Excavation | US G.O.M | Silty Sand | 20m |
| Caisson Excavation | US G.O.M | Soft Clay | 76m |
| Platform Salvage | US G.O.M | Soft Clay | 70m |
| Well Head Excavation | US G.O.M | Medium Clay | 25m |
| Well Head Excavation | US G.O.M | Medium Clay | 60m |
| Platform Recovery | US G.O.M | Medium Clay | 70m |
| Platform Recovery | US G.O.M | Medium Clay | 76m |
| 20" Pipeline De-burial | US G.O.M | Soft Clay | 204m |
| Platform Recovery | US G.O.M | Medium Clay | 30m |
| Debris basket collection and deck salvage | US G.O.M | Medium Clay | 25m |
| Two 26" Well Heads 15' BML | US G.O.M | Medium Clay | 72m |
| Barge Salvage | US G.O.M | Sandy / Silty Clay | 3.5m |
| Platform Abandonment | US G.O.M | Soft Mud | 27m |
| Heat Exchanger Burial | East Timor | Sandy / Silty Clay | 80m - 100m |
| Trunk line Excavation | US G.O.M | Soft Mud | 38m |
| Conductor Excavation | US G.O.M | oft Clay | 37m |
| Platform Salvage | US G.O.M | Soft Clay | 70m |
| Platform Salvage | US G.O.M | Soft Clay | 70m |
| Platform Salvage | US G.O.M | Soft Clay | 72m |
| Platform Deck Salvage | US G.O.M | Soft Clay | 70m |
| Well Intervention | US G.O.M | Soft Clay | 42m |
| Conductor Excavation | US G.O.M | Soft Clay | 40m |
| Platform Salvage | US G.O.M | Soft Clay | 72m |
| Mooring Wire Abandonment | New Zealand | Silt | 115m |
| 60" Caisson Excavation | US G.O.M | Soft Clay | 8m |
| Well-Head Excavation | US G.O.M | Medium Clay | 46m |
| Well-Head Excavation | US G.O.M | Medium Clay | 40m |
| Well-Head Excavation | US G.O.M | Soft Clay | 45m |
| Platform Salvage Excavation | US G.O.M | Soft Clay | 70m |
| Platform Leg Excavation | US G.O.M | Soft to Medium Clay | 70m |
| Jacket Leg Excavations | US G.O.M | Soft Clay | 50m |
| Platform Salvage/Well Excavations | US G.O.M | Soft to Firm Clay | 40m |
| Conductor Excavation | US G.O.M | Soft Mud | 70m |
| Conductor Excavation | US G.O.M | Soft Clay | 30m |
| Wellhead & Jacket Leg Excavation | US G.O.M | Soft Clay | 32m |
| Wellhead Excavation | US G.O.M | Firm Clay | 30m |
| Backfilling Well Excavation | US G.O.M | Soft Mud | 50m |
| Wellhead Excavation | US G.O.M | Soft Mud | 50m |
| Wellhead Excavation | US G.O.M | Firm Clay | 30m |
| Wellhead Excavation | US G.O.M | Firm Clay | 45m |
| Jacket Leg Excavation - Decommissioning | US G.O.M | Mud | 70m |
| Post Hurricane Conductor De-burial | US G.O.M | Mud | 40m |
| Jacket Leg Excavation - Decommissioning | Indonesia | Sand & Soft Clay | 85m |
| Jack-up Rig Leg Recovery | US G.O.M | Firm Clay | 110m |
| Providing Access for Hydraulic Pipeline Cutter | Singapore | Rock & Backfill Removal | 20m |
| De-burial of Jack-up Spud Cans | North Sea - Dutch Sector | Sand to Firm Clay | 50m - 60m |
| Well Head De-burial | Malaysia | Sand & Light Clay | 80m |
| Spud Can Excavation | Vietnam | Sand | 5m |
Pipeline Trenchingtop
| Scope of Work - Pipeline Trenching | Location | Seabed Material | Water Depth |
| Pipeline Post Trenching | Bahamas | Sand | 28m |
| Pipeline Post Trenching | Mexico | Clay | 50m |
| Pipeline Post Trenching | Mexico | Clay | 50m |
| Pipeline Crossing Remediation | Trinidad & Tobago | Clayey Soils | 55m |
| Pipeline Post Trenching | US G.O.M | Soft pre-disturbed material | 61m |
| Pipeline Trenching & Free-span Rectification | Iran | Soft, Silty Clay | 64m |
| Pipeline Post Trenching - 20" Dia | US G.O.M | Soft Clay & Sand | 76m |
| Pipeline Post Trenching - 16" Dia | Persian Gulf | Soft Clay & Sand | 3m - 7m |
| Pipeline Post Trenching | Mexico | Medium Clay | 50m |
| Pipeline Post Trenching | Indonesia | Silty Clay | 12m |
| Flexible Pipeline De-burial | Norway | Soft Clay | 12m |
| Pipeline Installation | Venezuela | Soft mud/clay | 150m |
| Seabed Levelling | U.S. G.O.M | Soft Clay | 40m |
| Pipeline Crossings | Mexico | Firm Clay | 35m |
| Pipeline Post Trenching - 20" & 24" Dia | Mexico | Firm Clay | 80m |
| Pipeline Post Trenching - 24" & 36" Dia | Mexico | Firm Clay | 35m |
| Pipeline Post Trenching - 20" Dia | Mexico | Firm Clay | 40m |
| Pipeline Post Trenching - 12" Dia | Venezuela | Soft Mud | 10m |
| Pipeline Post Trenching - 36" Dia | Mexico | Firm Clay | 40m |
| Pipeline Post Trenching - 20" Dia | Middle East | Sandy Silt | 5m - 21m |
| PipelinePost Trenching - 16" Dia | Mexico | Firm Clay | 50m |
| Pipeline Post Trenching - 12" Dia | US G.O.M | Soft Clay | 40m |
| Pipeline Crossings | Saudi Arabia | Clayey Sand | 9m - 36m |
| Pipeline Post Trenching - 12" Dia | Venezuela | Soft Mud | 5m - 25m |
| Pipeline Post Trenching - 16" Dia | Mexico | Firm Clay | 33m |
| Pipeline Post Trenching - 8" Dia | US G.O.M | Soft Clay | 40m |
| Pipeline Post Trenching - 16" Dia | Mexico | Firm Clay | 33m |
| Pipeline Post Trenching - 8" Dia | US G.O.M | Soft Clay | 40m |
| Sandwave Clearance & Post Trenching 20" Dia | India | Soft Sand & Clay | 25m - 40m |
| Pipeline Post Trenching - 24" Dia | Mexico | Firm Clay | 50m |
| Post Trenching Pipeline | Mexico | Firm Clay | 50m |
| Pipe Crossing Post Trenching - 12" & 36" Dia | Mexico | Sand & Mud | 50m |
| Pipeline Trenching | US G.O.M | Sand | 46m |
| Pipeline Post Trenching - 12", 24" & 36" Dia | Mexico | Sand & Clay | 66m |
| Pipeline Post Trenching - 8" & 10" Dia | US G.O.M | Soft Mud | 65m |
| Pipeline Post Trenching - 36" Dia | Mexico | Soft Mud | 80m |
| Pipeline Post Trenching - 12" Dia | US G.O.M | Soft Mud | 70m |
| Pipeline Trenching | Mexico | Soft Clay | 60m |
| Pipeline Trenching | U.S. G.O.M | Soft Clay | 40m |
| Pipeline Trenching | U.S. G.O.M | Firm Clay | 25m |
| Post Trenching 24" Pipelines | Mexico | Soft Clay | 80m |
| Post Trenching Pipeline | Mexico | Soft Clay | 45m - 65m |
| Post Trenching 12" Pipeline | U.S. G.O.M | Soft Clay | 15m |
| Pipeline Trenching | Trinidad | Soft Mud | 75m |
| Post Trenching 12", 18" & 20" Pipelines | Mexico | Firm Clay | 40m - 55m |
| Pipeline Crossing Preparation | Mexico | Firm Clay | 50m |
| Pipeline Trenching & Crossing Preparation | Mexico | Firm Clay | 40m - 60m |
| Pipeline Trenching 30" Pipeline | Mexico | Clay | 45m |
| Post Trenching 20" Pipeline | Mexico | Firm Clay | 40m - 55m |
| Post Trenching 30" Pipeline | Mexico | Clay | 45m |
| Post Trenching 11" Pipeline | Mexico | Clay | 20m - 30m |
| Post Trenching 10" Pipeline | Mexico | Clay | 20m - 30m |
| Post Trenching 10" Pipeline | Mexico | Firm Clay | 50m |
| Post Trenching 10" Pipeline | Mexico | Clay | 20m - 30m |
| Post Trenching 11" Pipeline | Mexico | Clay | 20m - 30m |
| Post Trenching 10" Pipeline | Mexico | Clay | 50m |
| Post Trenching 2 x 12" Pipelines | India | Firm Clay | 4m - 20m |
| Pipeline Post Trenching - 12" Dia | India | Firm Clay | 2m - 5m |
| Pipeline Post Trenching - 8" Dia | Mexico | Firm Clay | 40m - 50m |
| Pipeline Post Trenching - 24" Dia | Mexico | Firm Clay | 40m - 50m |
| Pipeline Post Trenching - 20" Dia | Indonesia | Firm Clay | 5m - 10m |
| Numerous Pipe Crossings - 6" & 8" Dia | Mexico | Firm Clay | 38m - 55m |
| Pipeline Post Trenching - 20" & 24" Dia | Mexico | Firm Clay | 40m - 50m |
| Pipeline Trenching | Mexico | Firm Clay | 40m - 60m |
| Pipeline Post Trenching - 24" Dia | Indonesia | Firm Clay | 5m |
| Pipeline Post Trenching Shore Approach - 30" Dia | Cameroon | Sand & Clay | 3m - 8m |
| Pipeline & Umbilical Post Trenching | Egypt | Sand & Clay | 8m - 20m |
| Pipeline Post Trenching - Various Sizes | Egypt | Sand with No Cohesion | 2m - 10m |
| Pipeline Post Trenching | Mexico | Clay | 40m - 60m |
| Pipeline Post Trenching - Various Sizes | Mexico | Sands & Clay | 40m - 60m |
| Pipeline Post Trenching - Various Sizes | Egypt | Sand with No Cohesion | 2m - 8m |
| Pipeline Post Trenching - 36" Dia | Egypt | Sands & Light Clay | 5m - 65m |
| Backfilling of a 45km trench | Mexico | Sand & Clay | 40m - 60m |
Pipeline Tie-Instop
| Scope of Work | Location | Seabed Material | Water Depth |
| Subsea Tie-In Excavation | U.S. G.O.M | Soft Mud | 55m |
| Trench Clearing/Rock Dump Removal | Sakhalin | Sandy Sediment | 35m |
| Subsea Tie-In Trenching | U.S. G.O.M | Firm Clay | 30m |
| Subsea Tie-In/8" Pipeline De-burial | U.S. G.O.M | Soft Clay | 210m |
| Pipeline De-burial | North Sea | Sand | 110m |
| Rock Dump Removal | Sakhalin, Russia | Large & Small Rocks | 30m |
| Pre & Post Trenching | Sakhalin, Russia | Sand | 10m - 30m |
| Rock Dump Removal 300 - 400 mm | W Australia | Rock Dump Removal | 125m |
| Tie-in Excavation | U.S. G.O.M | Soft Mud | 206m |
| Rock Dump Removal for Pipeline De-burial | North Sea | Rock dump 100mm | 100m - 110m |
| Seabed Preparation for Tie-In Installation | North Sea | Sands & Very Soft Clay | 43m |
| Post Trenching of two Pipelines | North Sea | Sand | 2m - 5m |
Harbour Clearancetop
| Scope of Work | Location | Seabed Material | Water Depth |
| Harbour Clearance | Scotland | Stiff Mud | 12m |
| Berth Clearance | Scotland | Mud/Silt | 4m - 8m |
| Jetty Clearance - Multiple | Indonesia | Silt/Mud | 11m - 20m |
| Jetty Clearance - Decommissioning | Azerbaijan | Silt, Mud & Soft Clay | 4m - 6m |
| Harbour Clearance | Scotland | Silt | 5m |
